Merge commit '2c563880ea' into work.xattr

pick xattr_handler conversion from lustre tree

30 files changed, 242 insertions, 1206 deletions

diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig
index 06e41d24ec62..6c00d6f765c6 100644
--- a/drivers/staging/android/Kconfig
+++ b/drivers/staging/android/Kconfig
@@ -24,19 +24,6 @@ config ANDROID_LOW_MEMORY_KILLER
 	  scripts (/init.rc), and it defines priority values with minimum free memory size
 	  for each priority.
 
-config SW_SYNC
-	bool "Software synchronization framework"
-	default n
-	depends on SYNC_FILE
-	depends on DEBUG_FS
-	---help---
-	  A sync object driver that uses a 32bit counter to coordinate
-	  synchronization.  Useful when there is no hardware primitive backing
-	  the synchronization.
-
-	  WARNING: improper use of this can result in deadlocking kernel
-	  drivers from userspace. Intended for test and debug only.
-
 source "drivers/staging/android/ion/Kconfig"
 
 endif # if ANDROID
diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile
index 7ca61b77a8d4..7ed1be798909 100644
--- a/drivers/staging/android/Makefile
+++ b/drivers/staging/android/Makefile
@@ -4,4 +4,3 @@ obj-y					+= ion/
 
 obj-$(CONFIG_ASHMEM)			+= ashmem.o
 obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER)	+= lowmemorykiller.o
-obj-$(CONFIG_SW_SYNC)			+= sw_sync.o sync_debug.o
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index a2cf93b59016..88dd17e8b19a 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -205,19 +205,16 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
 			goto err2;
 	}
 
-	buffer->dev = dev;
-	buffer->size = len;
-
-	table = heap->ops->map_dma(heap, buffer);
-	if (WARN_ONCE(table == NULL,
-			"heap->ops->map_dma should return ERR_PTR on error"))
-		table = ERR_PTR(-EINVAL);
-	if (IS_ERR(table)) {
+	if (buffer->sg_table == NULL) {
+		WARN_ONCE(1, "This heap needs to set the sgtable");
 		ret = -EINVAL;
 		goto err1;
 	}
 
-	buffer->sg_table = table;
+	table = buffer->sg_table;
+	buffer->dev = dev;
+	buffer->size = len;
+
 	if (ion_buffer_fault_user_mappings(buffer)) {
 		int num_pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
 		struct scatterlist *sg;
@@ -226,7 +223,7 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
 		buffer->pages = vmalloc(sizeof(struct page *) * num_pages);
 		if (!buffer->pages) {
 			ret = -ENOMEM;
-			goto err;
+			goto err1;
 		}
 
 		for_each_sg(table->sgl, sg, table->nents, i) {
@@ -260,8 +257,6 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
 	mutex_unlock(&dev->buffer_lock);
 	return buffer;
 
-err:
-	heap->ops->unmap_dma(heap, buffer);
 err1:
 	heap->ops->free(buffer);
 err2:
@@ -273,7 +268,6 @@ void ion_buffer_destroy(struct ion_buffer *buffer)
 {
 	if (WARN_ON(buffer->kmap_cnt > 0))
 		buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
-	buffer->heap->ops->unmap_dma(buffer->heap, buffer);
 	buffer->heap->ops->free(buffer);
 	vfree(buffer->pages);
 	kfree(buffer);
@@ -551,7 +545,8 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
 }
 EXPORT_SYMBOL(ion_alloc);
 
-static void ion_free_nolock(struct ion_client *client, struct ion_handle *handle)
+static void ion_free_nolock(struct ion_client *client,
+			    struct ion_handle *handle)
 {
 	bool valid_handle;
 
@@ -576,32 +571,6 @@ void ion_free(struct ion_client *client, struct ion_handle *handle)
 }
 EXPORT_SYMBOL(ion_free);
 
-int ion_phys(struct ion_client *client, struct ion_handle *handle,
-	     ion_phys_addr_t *addr, size_t *len)
-{
-	struct ion_buffer *buffer;
-	int ret;
-
-	mutex_lock(&client->lock);
-	if (!ion_handle_validate(client, handle)) {
-		mutex_unlock(&client->lock);
-		return -EINVAL;
-	}
-
-	buffer = handle->buffer;
-
-	if (!buffer->heap->ops->phys) {
-		pr_err("%s: ion_phys is not implemented by this heap (name=%s, type=%d).\n",
-			__func__, buffer->heap->name, buffer->heap->type);
-		mutex_unlock(&client->lock);
-		return -ENODEV;
-	}
-	mutex_unlock(&client->lock);
-	ret = buffer->heap->ops->phys(buffer->heap, buffer, addr, len);
-	return ret;
-}
-EXPORT_SYMBOL(ion_phys);
-
 static void *ion_buffer_kmap_get(struct ion_buffer *buffer)
 {
 	void *vaddr;
@@ -917,26 +886,6 @@ void ion_client_destroy(struct ion_client *client)
 }
 EXPORT_SYMBOL(ion_client_destroy);
 
-struct sg_table *ion_sg_table(struct ion_client *client,
-			      struct ion_handle *handle)
-{
-	struct ion_buffer *buffer;
-	struct sg_table *table;
-
-	mutex_lock(&client->lock);
-	if (!ion_handle_validate(client, handle)) {
-		pr_err("%s: invalid handle passed to map_dma.\n",
-		       __func__);
-		mutex_unlock(&client->lock);
-		return ERR_PTR(-EINVAL);
-	}
-	buffer = handle->buffer;
-	table = buffer->sg_table;
-	mutex_unlock(&client->lock);
-	return table;
-}
-EXPORT_SYMBOL(ion_sg_table);
-
 static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
 				       struct device *dev,
 				       enum dma_data_direction direction);
@@ -1358,7 +1307,8 @@ static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		struct ion_handle *handle;
 
 		mutex_lock(&client->lock);
-		handle = ion_handle_get_by_id_nolock(client, data.handle.handle);
+		handle = ion_handle_get_by_id_nolock(client,
+						     data.handle.handle);
 		if (IS_ERR(handle)) {
 			mutex_unlock(&client->lock);
 			return PTR_ERR(handle);
@@ -1588,8 +1538,7 @@ void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap)
 {
 	struct dentry *debug_file;
 
-	if (!heap->ops->allocate || !heap->ops->free || !heap->ops->map_dma ||
-	    !heap->ops->unmap_dma)
+	if (!heap->ops->allocate || !heap->ops->free)
 		pr_err("%s: can not add heap with invalid ops struct.\n",
 		       __func__);
 
@@ -1703,37 +1652,3 @@ void ion_device_destroy(struct ion_device *dev)
 }
 EXPORT_SYMBOL(ion_device_destroy);
 
-void __init ion_reserve(struct ion_platform_data *data)
-{
-	int i;
-
-	for (i = 0; i < data->nr; i++) {
-		if (data->heaps[i].size == 0)
-			continue;
-
-		if (data->heaps[i].base == 0) {
-			phys_addr_t paddr;
-
-			paddr = memblock_alloc_base(data->heaps[i].size,
-						    data->heaps[i].align,
-						    MEMBLOCK_ALLOC_ANYWHERE);
-			if (!paddr) {
-				pr_err("%s: error allocating memblock for heap %d\n",
-					__func__, i);
-				continue;
-			}
-			data->heaps[i].base = paddr;
-		} else {
-			int ret = memblock_reserve(data->heaps[i].base,
-					       data->heaps[i].size);
-			if (ret)
-				pr_err("memblock reserve of %zx@%lx failed\n",
-				       data->heaps[i].size,
-				       data->heaps[i].base);
-		}
-		pr_info("%s: %s reserved base %lx size %zu\n", __func__,
-			data->heaps[i].name,
-			data->heaps[i].base,
-			data->heaps[i].size);
-	}
-}
diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h
index a1331fc169a1..93dafb4586e4 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -73,17 +73,6 @@ struct ion_platform_data {
 };
 
 /**
- * ion_reserve() - reserve memory for ion heaps if applicable
- * @data:	platform data specifying starting physical address and
- *		size
- *
- * Calls memblock reserve to set aside memory for heaps that are
- * located at specific memory addresses or of specific sizes not
- * managed by the kernel
- */
-void ion_reserve(struct ion_platform_data *data);
-
-/**
  * ion_client_create() -  allocate a client and returns it
  * @dev:		the global ion device
  * @name:		used for debugging
@@ -130,36 +119,6 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
 void ion_free(struct ion_client *client, struct ion_handle *handle);
 
 /**
- * ion_phys - returns the physical address and len of a handle
- * @client:	the client
- * @handle:	the handle
- * @addr:	a pointer to put the address in
- * @len:	a pointer to put the length in
- *
- * This function queries the heap for a particular handle to get the
- * handle's physical address.  It't output is only correct if
- * a heap returns physically contiguous memory -- in other cases
- * this api should not be implemented -- ion_sg_table should be used
- * instead.  Returns -EINVAL if the handle is invalid.  This has
- * no implications on the reference counting of the handle --
- * the returned value may not be valid if the caller is not
- * holding a reference.
- */
-int ion_phys(struct ion_client *client, struct ion_handle *handle,
-	     ion_phys_addr_t *addr, size_t *len);
-
-/**
- * ion_map_dma - return an sg_table describing a handle
- * @client:	the client
- * @handle:	the handle
- *
- * This function returns the sg_table describing
- * a particular ion handle.
- */
-struct sg_table *ion_sg_table(struct ion_client *client,
-			      struct ion_handle *handle);
-
-/**
  * ion_map_kernel - create mapping for the given handle
  * @client:	the client
  * @handle:	handle to map
diff --git a/drivers/staging/android/ion/ion_carveout_heap.c b/drivers/staging/android/ion/ion_carveout_heap.c
index 1fb0d81556da..c4f0795fb62e 100644
--- a/drivers/staging/android/ion/ion_carveout_heap.c
+++ b/drivers/staging/android/ion/ion_carveout_heap.c
@@ -25,6 +25,8 @@
 #include "ion.h"
 #include "ion_priv.h"
 
+#define ION_CARVEOUT_ALLOCATE_FAIL	-1
+
 struct ion_carveout_heap {
 	struct ion_heap heap;
 	struct gen_pool *pool;
@@ -56,19 +58,6 @@ void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
 	gen_pool_free(carveout_heap->pool, addr, size);
 }
 
-static int ion_carveout_heap_phys(struct ion_heap *heap,
-				  struct ion_buffer *buffer,
-				  ion_phys_addr_t *addr, size_t *len)
-{
-	struct sg_table *table = buffer->priv_virt;
-	struct page *page = sg_page(table->sgl);
-	ion_phys_addr_t paddr = PFN_PHYS(page_to_pfn(page));
-
-	*addr = paddr;
-	*len = buffer->size;
-	return 0;
-}
-
 static int ion_carveout_heap_allocate(struct ion_heap *heap,
 				      struct ion_buffer *buffer,
 				      unsigned long size, unsigned long align,
@@ -95,7 +84,7 @@ static int ion_carveout_heap_allocate(struct ion_heap *heap,
 	}
 
 	sg_set_page(table->sgl, pfn_to_page(PFN_DOWN(paddr)), size, 0);
-	buffer->priv_virt = table;
+	buffer->sg_table = table;
 
 	return 0;
 
@@ -109,7 +98,7 @@ err_free:
 static void ion_carveout_heap_free(struct ion_buffer *buffer)
 {
 	struct ion_heap *heap = buffer->heap;
-	struct sg_table *table = buffer->priv_virt;
+	struct sg_table *table = buffer->sg_table;
 	struct page *page = sg_page(table->sgl);
 	ion_phys_addr_t paddr = PFN_PHYS(page_to_pfn(page));
 
@@ -124,23 +113,9 @@ static void ion_carveout_heap_free(struct ion_buffer *buffer)
 	kfree(table);
 }
 
-static struct sg_table *ion_carveout_heap_map_dma(struct ion_heap *heap,
-						  struct ion_buffer *buffer)
-{
-	return buffer->priv_virt;
-}
-
-static void ion_carveout_heap_unmap_dma(struct ion_heap *heap,
-					struct ion_buffer *buffer)
-{
-}
-
 static struct ion_heap_ops carveout_heap_ops = {
 	.allocate = ion_carveout_heap_allocate,
 	.free = ion_carveout_heap_free,
-	.phys = ion_carveout_heap_phys,
-	.map_dma = ion_carveout_heap_map_dma,
-	.unmap_dma = ion_carveout_heap_unmap_dma,
 	.map_user = ion_heap_map_user,
 	.map_kernel = ion_heap_map_kernel,
 	.unmap_kernel = ion_heap_unmap_kernel,
diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c
index e0553fee9b8a..560cf907aed5 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -75,7 +75,7 @@ static int ion_chunk_heap_allocate(struct ion_heap *heap,
 		sg = sg_next(sg);
 	}
 
-	buffer->priv_virt = table;
+	buffer->sg_table = table;
 	chunk_heap->allocated += allocated_size;
 	return 0;
 err:
@@ -95,7 +95,7 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
 	struct ion_heap *heap = buffer->heap;
 	struct ion_chunk_heap *chunk_heap =
 		container_of(heap, struct ion_chunk_heap, heap);
-	struct sg_table *table = buffer->priv_virt;
+	struct sg_table *table = buffer->sg_table;
 	struct scatterlist *sg;
 	int i;
 	unsigned long allocated_size;
@@ -117,22 +117,9 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
 	kfree(table);
 }
 
-static struct sg_table *ion_chunk_heap_map_dma(struct ion_heap *heap,
-					       struct ion_buffer *buffer)
-{
-	return buffer->priv_virt;
-}
-
-static void ion_chunk_heap_unmap_dma(struct ion_heap *heap,
-				     struct ion_buffer *buffer)
-{
-}
-
 static struct ion_heap_ops chunk_heap_ops = {
 	.allocate = ion_chunk_heap_allocate,
 	.free = ion_chunk_heap_free,
-	.map_dma = ion_chunk_heap_map_dma,
-	.unmap_dma = ion_chunk_heap_unmap_dma,
 	.map_user = ion_heap_map_user,
 	.map_kernel = ion_heap_map_kernel,
 	.unmap_kernel = ion_heap_unmap_kernel,
diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c
index a3446da4fdc2..d5ff3a282dfd 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -78,6 +78,7 @@ static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
 		goto free_table;
 	/* keep this for memory release */
 	buffer->priv_virt = info;
+	buffer->sg_table = info->table;
 	dev_dbg(dev, "Allocate buffer %p\n", buffer);
 	return 0;
 
@@ -105,36 +106,6 @@ static void ion_cma_free(struct ion_buffer *buffer)
 	kfree(info);
 }
 
-/* return physical address in addr */
-static int ion_cma_phys(struct ion_heap *heap, struct ion_buffer *buffer,
-			ion_phys_addr_t *addr, size_t *len)
-{
-	struct ion_cma_heap *cma_heap = to_cma_heap(buffer->heap);
-	struct device *dev = cma_heap->dev;
-	struct ion_cma_buffer_info *info = buffer->priv_virt;
-
-	dev_dbg(dev, "Return buffer %p physical address %pa\n", buffer,
-		&info->handle);
-
-	*addr = info->handle;
-	*len = buffer->size;
-
-	return 0;
-}
-
-static struct sg_table *ion_cma_heap_map_dma(struct ion_heap *heap,
-					     struct ion_buffer *buffer)
-{
-	struct ion_cma_buffer_info *info = buffer->priv_virt;
-
-	return info->table;
-}
-
-static void ion_cma_heap_unmap_dma(struct ion_heap *heap,
-				   struct ion_buffer *buffer)
-{
-}
-
 static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer,
 			struct vm_area_struct *vma)
 {
@@ -162,9 +133,6 @@ static void ion_cma_unmap_kernel(struct ion_heap *heap,
 static struct ion_heap_ops ion_cma_ops = {
 	.allocate = ion_cma_allocate,
 	.free = ion_cma_free,
-	.map_dma = ion_cma_heap_map_dma,
-	.unmap_dma = ion_cma_heap_unmap_dma,
-	.phys = ion_cma_phys,
 	.map_user = ion_cma_mmap,
 	.map_kernel = ion_cma_map_kernel,
 	.unmap_kernel = ion_cma_unmap_kernel,
diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h
index 0239883bffb7..25e4bb2dac87 100644
--- a/drivers/staging/android/ion/ion_priv.h
+++ b/drivers/staging/android/ion/ion_priv.h
@@ -42,8 +42,6 @@ struct ion_buffer *ion_handle_buffer(struct ion_handle *handle);
  * @size:		size of the buffer
  * @priv_virt:		private data to the buffer representable as
  *			a void *
- * @priv_phys:		private data to the buffer representable as
- *			an ion_phys_addr_t (and someday a phys_addr_t)
  * @lock:		protects the buffers cnt fields
  * @kmap_cnt:		number of times the buffer is mapped to the kernel
  * @vaddr:		the kernel mapping if kmap_cnt is not zero
@@ -69,10 +67,7 @@ struct ion_buffer {
 	unsigned long flags;
 	unsigned long private_flags;
 	size_t size;
-	union {
-		void *priv_virt;
-		ion_phys_addr_t priv_phys;
-	};
+	void *priv_virt;
 	struct mutex lock;
 	int kmap_cnt;
 	void *vaddr;
@@ -91,10 +86,6 @@ void ion_buffer_destroy(struct ion_buffer *buffer);
  * struct ion_heap_ops - ops to operate on a given heap
  * @allocate:		allocate memory
  * @free:		free memory
- * @phys		get physical address of a buffer (only define on
- *			physically contiguous heaps)
- * @map_dma		map the memory for dma to a scatterlist
- * @unmap_dma		unmap the memory for dma
  * @map_kernel		map memory to the kernel
  * @unmap_kernel	unmap memory to the kernel
  * @map_user		map memory to userspace
@@ -111,11 +102,6 @@ struct ion_heap_ops {
 			struct ion_buffer *buffer, unsigned long len,
 			unsigned long align, unsigned long flags);
 	void (*free)(struct ion_buffer *buffer);
-	int (*phys)(struct ion_heap *heap, struct ion_buffer *buffer,
-		    ion_phys_addr_t *addr, size_t *len);
-	struct sg_table * (*map_dma)(struct ion_heap *heap,
-				     struct ion_buffer *buffer);
-	void (*unmap_dma)(struct ion_heap *heap, struct ion_buffer *buffer);
 	void * (*map_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
 	void (*unmap_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
 	int (*map_user)(struct ion_heap *mapper, struct ion_buffer *buffer,
@@ -328,20 +314,6 @@ struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *);
 void ion_cma_heap_destroy(struct ion_heap *);
 
 /**
- * kernel api to allocate/free from carveout -- used when carveout is
- * used to back an architecture specific custom heap
- */
-ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap, unsigned long size,
-				      unsigned long align);
-void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
-		       unsigned long size);
-/**
- * The carveout heap returns physical addresses, since 0 may be a valid
- * physical address, this is used to indicate allocation failed
- */
-#define ION_CARVEOUT_ALLOCATE_FAIL -1
-
-/**
  * functions for creating and destroying a heap pool -- allows you
  * to keep a pool of pre allocated memory to use from your heap.  Keeping
  * a pool of memory that is ready for dma, ie any cached mapping have been
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index b69dfc706440..b697c6da0c3a 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -164,7 +164,7 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
 		list_del(&page->lru);
 	}
 
-	buffer->priv_virt = table;
+	buffer->sg_table = table;
 	return 0;
 
 free_table:
@@ -199,17 +199,6 @@ static void ion_system_heap_free(struct ion_buffer *buffer)
 	kfree(table);
 }
 
-static struct sg_table *ion_system_heap_map_dma(struct ion_heap *heap,
-						struct ion_buffer *buffer)
-{
-	return buffer->priv_virt;
-}
-
-static void ion_system_heap_unmap_dma(struct ion_heap *heap,
-				      struct ion_buffer *buffer)
-{
-}
-
 static int ion_system_heap_shrink(struct ion_heap *heap, gfp_t gfp_mask,
 					int nr_to_scan)
 {
@@ -243,8 +232,6 @@ static int ion_system_heap_shrink(struct ion_heap *heap, gfp_t gfp_mask,
 static struct ion_heap_ops system_heap_ops = {
 	.allocate = ion_system_heap_allocate,
 	.free = ion_system_heap_free,
-	.map_dma = ion_system_heap_map_dma,
-	.unmap_dma = ion_system_heap_unmap_dma,
 	.map_kernel = ion_heap_map_kernel,
 	.unmap_kernel = ion_heap_unmap_kernel,
 	.map_user = ion_heap_map_user,
@@ -358,7 +345,7 @@ static int ion_system_contig_heap_allocate(struct ion_heap *heap,
 
 	sg_set_page(table->sgl, page, len, 0);
 
-	buffer->priv_virt = table;
+	buffer->sg_table = table;
 
 	ion_pages_sync_for_device(NULL, page, len, DMA_BIDIRECTIONAL);
 
@@ -375,7 +362,7 @@ free_pages:
 
 static void ion_system_contig_heap_free(struct ion_buffer *buffer)
 {
-	struct sg_table *table = buffer->priv_virt;
+	struct sg_table *table = buffer->sg_table;
 	struct page *page = sg_page(table->sgl);
 	unsigned long pages = PAGE_ALIGN(buffer->size) >> PAGE_SHIFT;
 	unsigned long i;
@@ -386,34 +373,9 @@ static void ion_system_contig_heap_free(struct ion_buffer *buffer)
 	kfree(table);
 }
 
-static int ion_system_contig_heap_phys(struct ion_heap *heap,
-				       struct ion_buffer *buffer,
-				       ion_phys_addr_t *addr, size_t *len)
-{
-	struct sg_table *table = buffer->priv_virt;
-	struct page *page = sg_page(table->sgl);
-	*addr = page_to_phys(page);
-	*len = buffer->size;
-	return 0;
-}
-
-static struct sg_table *ion_system_contig_heap_map_dma(struct ion_heap *heap,
-						struct ion_buffer *buffer)
-{
-	return buffer->priv_virt;
-}
-
-static void ion_system_contig_heap_unmap_dma(struct ion_heap *heap,
-					     struct ion_buffer *buffer)
-{
-}
-
 static struct ion_heap_ops kmalloc_ops = {
 	.allocate = ion_system_contig_heap_allocate,
 	.free = ion_system_contig_heap_free,
-	.phys = ion_system_contig_heap_phys,
-	.map_dma = ion_system_contig_heap_map_dma,
-	.unmap_dma = ion_system_contig_heap_unmap_dma,
 	.map_kernel = ion_heap_map_kernel,
 	.unmap_kernel = ion_heap_unmap_kernel,
 	.map_user = ion_heap_map_user,
diff --git a/drivers/staging/android/sw_sync.c b/drivers/staging/android/sw_sync.c
deleted file mode 100644
index 115c9174705f..000000000000
--- a/drivers/staging/android/sw_sync.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*
- * drivers/dma-buf/sw_sync.c
- *
- * Copyright (C) 2012 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/uaccess.h>
-#include <linux/slab.h>
-#include <linux/sync_file.h>
-
-#include "sync_debug.h"
-
-#define CREATE_TRACE_POINTS
-#include "trace/sync.h"
-
-struct sw_sync_create_fence_data {
-	__u32	value;
-	char	name[32];
-	__s32	fence; /* fd of new fence */
-};
-
-#define SW_SYNC_IOC_MAGIC	'W'
-
-#define SW_SYNC_IOC_CREATE_FENCE	_IOWR(SW_SYNC_IOC_MAGIC, 0,\
-		struct sw_sync_create_fence_data)
-#define SW_SYNC_IOC_INC			_IOW(SW_SYNC_IOC_MAGIC, 1, __u32)
-
-static const struct fence_ops timeline_fence_ops;
-
-static inline struct sync_pt *fence_to_sync_pt(struct fence *fence)
-{
-	if (fence->ops != &timeline_fence_ops)
-		return NULL;
-	return container_of(fence, struct sync_pt, base);
-}
-
-/**
- * sync_timeline_create() - creates a sync object
- * @name:	sync_timeline name
- *
- * Creates a new sync_timeline. Returns the sync_timeline object or NULL in
- * case of error.
- */
-struct sync_timeline *sync_timeline_create(const char *name)
-{
-	struct sync_timeline *obj;
-
-	obj = kzalloc(sizeof(*obj), GFP_KERNEL);
-	if (!obj)
-		return NULL;
-
-	kref_init(&obj->kref);
-	obj->context = fence_context_alloc(1);
-	strlcpy(obj->name, name, sizeof(obj->name));
-
-	INIT_LIST_HEAD(&obj->child_list_head);
-	INIT_LIST_HEAD(&obj->active_list_head);
-	spin_lock_init(&obj->child_list_lock);
-
-	sync_timeline_debug_add(obj);
-
-	return obj;
-}
-
-static void sync_timeline_free(struct kref *kref)
-{
-	struct sync_timeline *obj =
-		container_of(kref, struct sync_timeline, kref);
-
-	sync_timeline_debug_remove(obj);
-
-	kfree(obj);
-}
-
-static void sync_timeline_get(struct sync_timeline *obj)
-{
-	kref_get(&obj->kref);
-}
-
-static void sync_timeline_put(struct sync_timeline *obj)
-{
-	kref_put(&obj->kref, sync_timeline_free);
-}
-
-/**
- * sync_timeline_signal() - signal a status change on a sync_timeline
- * @obj:	sync_timeline to signal
- * @inc:	num to increment on timeline->value
- *
- * A sync implementation should call this any time one of it's fences
- * has signaled or has an error condition.
- */
-static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
-{
-	unsigned long flags;
-	struct sync_pt *pt, *next;
-
-	trace_sync_timeline(obj);
-
-	spin_lock_irqsave(&obj->child_list_lock, flags);
-
-	obj->value += inc;
-
-	list_for_each_entry_safe(pt, next, &obj->active_list_head,
-				 active_list) {
-		if (fence_is_signaled_locked(&pt->base))
-			list_del_init(&pt->active_list);
-	}
-
-	spin_unlock_irqrestore(&obj->child_list_lock, flags);
-}
-
-/**
- * sync_pt_create() - creates a sync pt
- * @parent:	fence's parent sync_timeline
- * @size:	size to allocate for this pt
- * @inc:	value of the fence
- *
- * Creates a new sync_pt as a child of @parent.  @size bytes will be
- * allocated allowing for implementation specific data to be kept after
- * the generic sync_timeline struct. Returns the sync_pt object or
- * NULL in case of error.
- */
-static struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size,
-			     unsigned int value)
-{
-	unsigned long flags;
-	struct sync_pt *pt;
-
-	if (size < sizeof(*pt))
-		return NULL;
-
-	pt = kzalloc(size, GFP_KERNEL);
-	if (!pt)
-		return NULL;
-
-	spin_lock_irqsave(&obj->child_list_lock, flags);
-	sync_timeline_get(obj);
-	fence_init(&pt->base, &timeline_fence_ops, &obj->child_list_lock,
-		   obj->context, value);
-	list_add_tail(&pt->child_list, &obj->child_list_head);
-	INIT_LIST_HEAD(&pt->active_list);
-	spin_unlock_irqrestore(&obj->child_list_lock, flags);
-	return pt;
-}
-
-static const char *timeline_fence_get_driver_name(struct fence *fence)
-{
-	return "sw_sync";
-}
-
-static const char *timeline_fence_get_timeline_name(struct fence *fence)
-{
-	struct sync_timeline *parent = fence_parent(fence);
-
-	return parent->name;
-}
-
-static void timeline_fence_release(struct fence *fence)
-{
-	struct sync_pt *pt = fence_to_sync_pt(fence);
-	struct sync_timeline *parent = fence_parent(fence);
-	unsigned long flags;
-
-	spin_lock_irqsave(fence->lock, flags);
-	list_del(&pt->child_list);
-	if (WARN_ON_ONCE(!list_empty(&pt->active_list)))
-		list_del(&pt->active_list);
-	spin_unlock_irqrestore(fence->lock, flags);
-
-	sync_timeline_put(parent);
-	fence_free(fence);
-}
-
-static bool timeline_fence_signaled(struct fence *fence)
-{
-	struct sync_timeline *parent = fence_parent(fence);
-
-	return (fence->seqno > parent->value) ? false : true;
-}
-
-static bool timeline_fence_enable_signaling(struct fence *fence)
-{
-	struct sync_pt *pt = fence_to_sync_pt(fence);
-	struct sync_timeline *parent = fence_parent(fence);
-
-	if (timeline_fence_signaled(fence))
-		return false;
-
-	list_add_tail(&pt->active_list, &parent->active_list_head);
-	return true;
-}
-
-static void timeline_fence_value_str(struct fence *fence,
-				    char *str, int size)
-{
-	snprintf(str, size, "%d", fence->seqno);
-}
-
-static void timeline_fence_timeline_value_str(struct fence *fence,
-					     char *str, int size)
-{
-	struct sync_timeline *parent = fence_parent(fence);
-
-	snprintf(str, size, "%d", parent->value);
-}
-
-static const struct fence_ops timeline_fence_ops = {
-	.get_driver_name = timeline_fence_get_driver_name,
-	.get_timeline_name = timeline_fence_get_timeline_name,
-	.enable_signaling = timeline_fence_enable_signaling,
-	.signaled = timeline_fence_signaled,
-	.wait = fence_default_wait,
-	.release = timeline_fence_release,
-	.fence_value_str = timeline_fence_value_str,
-	.timeline_value_str = timeline_fence_timeline_value_str,
-};
-
-/*
- * *WARNING*
- *
- * improper use of this can result in deadlocking kernel drivers from userspace.
- */
-
-/* opening sw_sync create a new sync obj */
-static int sw_sync_debugfs_open(struct inode *inode, struct file *file)
-{
-	struct sync_timeline *obj;
-	char task_comm[TASK_COMM_LEN];
-
-	get_task_comm(task_comm, current);
-
-	obj = sync_timeline_create(task_comm);
-	if (!obj)
-		return -ENOMEM;
-
-	file->private_data = obj;
-
-	return 0;
-}
-
-static int sw_sync_debugfs_release(struct inode *inode, struct file *file)
-{
-	struct sync_timeline *obj = file->private_data;
-
-	smp_wmb();
-
-	sync_timeline_put(obj);
-	return 0;
-}
-
-static long sw_sync_ioctl_create_fence(struct sync_timeline *obj,
-				       unsigned long arg)
-{
-	int fd = get_unused_fd_flags(O_CLOEXEC);
-	int err;
-	struct sync_pt *pt;
-	struct sync_file *sync_file;
-	struct sw_sync_create_fence_data data;
-
-	if (fd < 0)
-		return fd;
-
-	if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {
-		err = -EFAULT;
-		goto err;
-	}
-
-	pt = sync_pt_create(obj, sizeof(*pt), data.value);
-	if (!pt) {
-		err = -ENOMEM;
-		goto err;
-	}
-
-	sync_file = sync_file_create(&pt->base);
-	if (!sync_file) {
-		fence_put(&pt->base);
-		err = -ENOMEM;
-		goto err;
-	}
-
-	data.fence = fd;
-	if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
-		fput(sync_file->file);
-		err = -EFAULT;
-		goto err;
-	}
-
-	fd_install(fd, sync_file->file);
-
-	return 0;
-
-err:
-	put_unused_fd(fd);
-	return err;
-}
-
-static long sw_sync_ioctl_inc(struct sync_timeline *obj, unsigned long arg)
-{
-	u32 value;
-
-	if (copy_from_user(&value, (void __user *)arg, sizeof(value)))
-		return -EFAULT;
-
-	sync_timeline_signal(obj, value);
-
-	return 0;
-}
-
-static long sw_sync_ioctl(struct file *file, unsigned int cmd,
-			  unsigned long arg)
-{
-	struct sync_timeline *obj = file->private_data;
-
-	switch (cmd) {
-	case SW_SYNC_IOC_CREATE_FENCE:
-		return sw_sync_ioctl_create_fence(obj, arg);
-
-	case SW_SYNC_IOC_INC:
-		return sw_sync_ioctl_inc(obj, arg);
-
-	default:
-		return -ENOTTY;
-	}
-}
-
-const struct file_operations sw_sync_debugfs_fops = {
-	.open           = sw_sync_debugfs_open,
-	.release        = sw_sync_debugfs_release,
-	.unlocked_ioctl = sw_sync_ioctl,
-	.compat_ioctl	= sw_sync_ioctl,
-};
diff --git a/drivers/staging/android/sync_debug.c b/drivers/staging/android/sync_debug.c
deleted file mode 100644
index 4c5a85595a85..000000000000
--- a/drivers/staging/android/sync_debug.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * drivers/base/sync.c
- *
- * Copyright (C) 2012 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/debugfs.h>
-#include "sync_debug.h"
-
-static struct dentry *dbgfs;
-
-static LIST_HEAD(sync_timeline_list_head);
-static DEFINE_SPINLOCK(sync_timeline_list_lock);
-static LIST_HEAD(sync_file_list_head);
-static DEFINE_SPINLOCK(sync_file_list_lock);
-
-void sync_timeline_debug_add(struct sync_timeline *obj)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&sync_timeline_list_lock, flags);
-	list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head);
-	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
-}
-
-void sync_timeline_debug_remove(struct sync_timeline *obj)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&sync_timeline_list_lock, flags);
-	list_del(&obj->sync_timeline_list);
-	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
-}
-
-void sync_file_debug_add(struct sync_file *sync_file)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&sync_file_list_lock, flags);
-	list_add_tail(&sync_file->sync_file_list, &sync_file_list_head);
-	spin_unlock_irqrestore(&sync_file_list_lock, flags);
-}
-
-void sync_file_debug_remove(struct sync_file *sync_file)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&sync_file_list_lock, flags);
-	list_del(&sync_file->sync_file_list);
-	spin_unlock_irqrestore(&sync_file_list_lock, flags);
-}
-
-static const char *sync_status_str(int status)
-{
-	if (status == 0)
-		return "signaled";
-
-	if (status > 0)
-		return "active";
-
-	return "error";
-}
-
-static void sync_print_fence(struct seq_file *s, struct fence *fence, bool show)
-{
-	int status = 1;
-	struct sync_timeline *parent = fence_parent(fence);
-
-	if (fence_is_signaled_locked(fence))
-		status = fence->status;
-
-	seq_printf(s, "  %s%sfence %s",
-		   show ? parent->name : "",
-		   show ? "_" : "",
-		   sync_status_str(status));
-
-	if (status <= 0) {
-		struct timespec64 ts64 =
-			ktime_to_timespec64(fence->timestamp);
-
-		seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec);
-	}
-
-	if (fence->ops->timeline_value_str &&
-		fence->ops->fence_value_str) {
-		char value[64];
-		bool success;
-
-		fence->ops->fence_value_str(fence, value, sizeof(value));
-		success = strlen(value);
-
-		if (success) {
-			seq_printf(s, ": %s", value);
-
-			fence->ops->timeline_value_str(fence, value,
-						       sizeof(value));
-
-			if (strlen(value))
-				seq_printf(s, " / %s", value);
-		}
-	}
-
-	seq_puts(s, "\n");
-}
-
-static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
-{
-	struct list_head *pos;
-	unsigned long flags;
-
-	seq_printf(s, "%s: %d\n", obj->name, obj->value);
-
-	spin_lock_irqsave(&obj->child_list_lock, flags);
-	list_for_each(pos, &obj->child_list_head) {
-		struct sync_pt *pt =
-			container_of(pos, struct sync_pt, child_list);
-		sync_print_fence(s, &pt->base, false);
-	}
-	spin_unlock_irqrestore(&obj->child_list_lock, flags);
-}
-
-static void sync_print_sync_file(struct seq_file *s,
-				  struct sync_file *sync_file)
-{
-	int i;
-
-	seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file->name,
-		   sync_status_str(atomic_read(&sync_file->status)));
-
-	for (i = 0; i < sync_file->num_fences; ++i)
-		sync_print_fence(s, sync_file->cbs[i].fence, true);
-}
-
-static int sync_debugfs_show(struct seq_file *s, void *unused)
-{
-	unsigned long flags;
-	struct list_head *pos;
-
-	seq_puts(s, "objs:\n--------------\n");
-
-	spin_lock_irqsave(&sync_timeline_list_lock, flags);
-	list_for_each(pos, &sync_timeline_list_head) {
-		struct sync_timeline *obj =
-			container_of(pos, struct sync_timeline,
-				     sync_timeline_list);
-
-		sync_print_obj(s, obj);
-		seq_puts(s, "\n");
-	}
-	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
-
-	seq_puts(s, "fences:\n--------------\n");
-
-	spin_lock_irqsave(&sync_file_list_lock, flags);
-	list_for_each(pos, &sync_file_list_head) {
-		struct sync_file *sync_file =
-			container_of(pos, struct sync_file, sync_file_list);
-
-		sync_print_sync_file(s, sync_file);
-		seq_puts(s, "\n");
-	}
-	spin_unlock_irqrestore(&sync_file_list_lock, flags);
-	return 0;
-}
-
-static int sync_info_debugfs_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, sync_debugfs_show, inode->i_private);
-}
-
-static const struct file_operations sync_info_debugfs_fops = {
-	.open           = sync_info_debugfs_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
-
-static __init int sync_debugfs_init(void)
-{
-	dbgfs = debugfs_create_dir("sync", NULL);
-
-	/*
-	 * The debugfs files won't ever get removed and thus, there is
-	 * no need to protect it against removal races. The use of
-	 * debugfs_create_file_unsafe() is actually safe here.
-	 */
-	debugfs_create_file_unsafe("info", 0444, dbgfs, NULL,
-				   &sync_info_debugfs_fops);
-	debugfs_create_file_unsafe("sw_sync", 0644, dbgfs, NULL,
-				   &sw_sync_debugfs_fops);
-
-	return 0;
-}
-late_initcall(sync_debugfs_init);
-
-#define DUMP_CHUNK 256
-static char sync_dump_buf[64 * 1024];
-void sync_dump(void)
-{
-	struct seq_file s = {
-		.buf = sync_dump_buf,
-		.size = sizeof(sync_dump_buf) - 1,
-	};
-	int i;
-
-	sync_debugfs_show(&s, NULL);
-
-	for (i = 0; i < s.count; i += DUMP_CHUNK) {
-		if ((s.count - i) > DUMP_CHUNK) {
-			char c = s.buf[i + DUMP_CHUNK];
-
-			s.buf[i + DUMP_CHUNK] = 0;
-			pr_cont("%s", s.buf + i);
-			s.buf[i + DUMP_CHUNK] = c;
-		} else {
-			s.buf[s.count] = 0;
-			pr_cont("%s", s.buf + i);
-		}
-	}
-}
diff --git a/drivers/staging/android/sync_debug.h b/drivers/staging/android/sync_debug.h
deleted file mode 100644
index fab66396d421..000000000000
--- a/drivers/staging/android/sync_debug.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * include/linux/sync.h
- *
- * Copyright (C) 2012 Google, Inc.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _LINUX_SYNC_H
-#define _LINUX_SYNC_H
-
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/fence.h>
-
-#include <linux/sync_file.h>
-#include <uapi/linux/sync_file.h>
-
-/**
- * struct sync_timeline - sync object
- * @kref:		reference count on fence.
- * @name:		name of the sync_timeline. Useful for debugging
- * @child_list_head:	list of children sync_pts for this sync_timeline
- * @child_list_lock:	lock protecting @child_list_head and fence.status
- * @active_list_head:	list of active (unsignaled/errored) sync_pts
- * @sync_timeline_list:	membership in global sync_timeline_list
- */
-struct sync_timeline {
-	struct kref		kref;
-	char			name[32];
-
-	/* protected by child_list_lock */
-	u64			context;
-	int			value;
-
-	struct list_head	child_list_head;
-	spinlock_t		child_list_lock;
-
-	struct list_head	active_list_head;
-
-	struct list_head	sync_timeline_list;
-};
-
-static inline struct sync_timeline *fence_parent(struct fence *fence)
-{
-	return container_of(fence->lock, struct sync_timeline,
-			    child_list_lock);
-}
-
-/**
- * struct sync_pt - sync_pt object
- * @base: base fence object
- * @child_list: sync timeline child's list
- * @active_list: sync timeline active child's list
- */
-struct sync_pt {
-	struct fence base;
-	struct list_head child_list;
-	struct list_head active_list;
-};
-
-#ifdef CONFIG_SW_SYNC
-
-extern const struct file_operations sw_sync_debugfs_fops;
-
-void sync_timeline_debug_add(struct sync_timeline *obj);
-void sync_timeline_debug_remove(struct sync_timeline *obj);
-void sync_file_debug_add(struct sync_file *fence);
-void sync_file_debug_remove(struct sync_file *fence);
-void sync_dump(void);
-
-#else
-# define sync_timeline_debug_add(obj)
-# define sync_timeline_debug_remove(obj)
-# define sync_file_debug_add(fence)
-# define sync_file_debug_remove(fence)
-# define sync_dump()
-#endif
-
-#endif /* _LINUX_SYNC_H */
diff --git a/drivers/staging/android/trace/sync.h b/drivers/staging/android/trace/sync.h
deleted file mode 100644
index 6b5ce9640ddd..000000000000
--- a/drivers/staging/android/trace/sync.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#undef TRACE_SYSTEM
-#define TRACE_INCLUDE_PATH ../../drivers/staging/android/trace
-#define TRACE_SYSTEM sync
-
-#if !defined(_TRACE_SYNC_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_SYNC_H
-
-#include "../sync_debug.h"
-#include <linux/tracepoint.h>
-
-TRACE_EVENT(sync_timeline,
-	TP_PROTO(struct sync_timeline *timeline),
-
-	TP_ARGS(timeline),
-
-	TP_STRUCT__entry(
-			__string(name, timeline->name)
-			__field(u32, value)
-	),
-
-	TP_fast_assign(
-			__assign_str(name, timeline->name);
-			__entry->value = timeline->value;
-	),
-
-	TP_printk("name=%s value=%d", __get_str(name), __entry->value)
-);
-
-#endif /* if !defined(_TRACE_SYNC_H) || defined(TRACE_HEADER_MULTI_READ) */
-
-/* This part must be outside protection */
-#include <trace/define_trace.h>
diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index 10f94ec34536..608403c7586b 100644
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -946,10 +946,8 @@ static int usbduxfast_auto_attach(struct comedi_device *dev,
 	}
 
 	devpriv->urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!devpriv->urb) {
-		dev_err(dev->class_dev, "Could not alloc. urb\n");
+	if (!devpriv->urb)
 		return -ENOMEM;
-	}
 
 	devpriv->inbuf = kmalloc(SIZEINBUF, GFP_KERNEL);
 	if (!devpriv->inbuf)
diff --git a/drivers/staging/ks7010/ks7010_sdio.c b/drivers/staging/ks7010/ks7010_sdio.c
index b7337fd813d5..47b69cbdb45b 100644
--- a/drivers/staging/ks7010/ks7010_sdio.c
+++ b/drivers/staging/ks7010/ks7010_sdio.c
@@ -297,11 +297,10 @@ static int enqueue_txdev(struct ks_wlan_private *priv, unsigned char *p,
 static int write_to_device(struct ks_wlan_private *priv, unsigned char *buffer,
 			   unsigned long size)
 {
-	int rc, retval;
+	int retval;
 	unsigned char rw_data;
 	struct hostif_hdr *hdr;
 	hdr = (struct hostif_hdr *)buffer;
-	rc = 0;
 
 	DPRINTK(4, "size=%d\n", hdr->size);
 	if (hdr->event < HIF_DATA_REQ || HIF_REQ_MAX < hdr->event) {
@@ -711,7 +710,6 @@ static int ks7010_sdio_update_index(struct ks_wlan_private *priv, u32 index)
 	int rc = 0;
 	int retval;
 	unsigned char *data_buf;
-	data_buf = NULL;
 
 	data_buf = kmalloc(sizeof(u32), GFP_KERNEL);
 	if (!data_buf) {
@@ -732,8 +730,7 @@ static int ks7010_sdio_update_index(struct ks_wlan_private *priv, u32 index)
 		goto error_out;
 	}
  error_out:
-	if (data_buf)
-		kfree(data_buf);
+	kfree(data_buf);
 	return rc;
 }
 
@@ -744,7 +741,7 @@ static int ks7010_sdio_data_compare(struct ks_wlan_private *priv, u32 address,
 	int rc = 0;
 	int retval;
 	unsigned char *read_buf;
-	read_buf = NULL;
+
 	read_buf = kmalloc(ROM_BUFF_SIZE, GFP_KERNEL);
 	if (!read_buf) {
 		rc = 1;
@@ -763,8 +760,7 @@ static int ks7010_sdio_data_compare(struct ks_wlan_private *priv, u32 address,
 		goto error_out;
 	}
  error_out:
-	if (read_buf)
-		kfree(read_buf);
+	kfree(read_buf);
 	return rc;
 }
 
@@ -778,8 +774,6 @@ static int ks7010_upload_firmware(struct ks_wlan_private *priv,
 	int length;
 	const struct firmware *fw_entry = NULL;
 
-	rom_buf = NULL;
-
 	/* buffer allocate */
 	rom_buf = kmalloc(ROM_BUFF_SIZE, GFP_KERNEL);
 	if (!rom_buf) {
@@ -879,8 +873,7 @@ static int ks7010_upload_firmware(struct ks_wlan_private *priv,
 	release_firmware(fw_entry);
  error_out0:
 	sdio_release_host(card->func);
-	if (rom_buf)
-		kfree(rom_buf);
+	kfree(rom_buf);
 	return rc;
 }
 
@@ -1141,7 +1134,6 @@ static void ks7010_sdio_remove(struct sdio_func *func)
 	int ret;
 	struct ks_sdio_card *card;
 	struct ks_wlan_private *priv;
-	struct net_device *netdev;
 	DPRINTK(1, "ks7010_sdio_remove()\n");
 
 	card = sdio_get_drvdata(func);
@@ -1151,8 +1143,9 @@ static void ks7010_sdio_remove(struct sdio_func *func)
 
 	DPRINTK(1, "priv = card->priv\n");
 	priv = card->priv;
-	netdev = priv->net_dev;
 	if (priv) {
+		struct net_device *netdev = priv->net_dev;
+
 		ks_wlan_net_stop(netdev);
 		DPRINTK(1, "ks_wlan_net_stop\n");
 
@@ -1199,9 +1192,7 @@ static void ks7010_sdio_remove(struct sdio_func *func)
 		unregister_netdev(netdev);
 
 		trx_device_exit(priv);
-		if (priv->ks_wlan_hw.read_buf) {
-			kfree(priv->ks_wlan_hw.read_buf);
-		}
+		kfree(priv->ks_wlan_hw.read_buf);
 		free_netdev(priv->net_dev);
 		card->priv = NULL;
 	}
diff --git a/drivers/staging/ks7010/michael_mic.c b/drivers/staging/ks7010/michael_mic.c
index e14c109b3cab..d332678781d2 100644
--- a/drivers/staging/ks7010/michael_mic.c
+++ b/drivers/staging/ks7010/michael_mic.c
@@ -20,15 +20,21 @@
 #define getUInt32( A, B ) 	(uint32_t)(A[B+0] << 0) + (A[B+1] << 8) + (A[B+2] << 16) + (A[B+3] << 24)
 
 // Convert from UInt32 to Byte[] in a portable way
-#define putUInt32( A, B, C ) 	A[B+0] = (uint8_t) (C & 0xff);		\
-				A[B+1] = (uint8_t) ((C>>8) & 0xff);	\
-				A[B+2] = (uint8_t) ((C>>16) & 0xff);	\
-				A[B+3] = (uint8_t) ((C>>24) & 0xff)
+#define putUInt32(A, B, C)					\
+do {								\
+	A[B + 0] = (uint8_t)(C & 0xff);				\
+	A[B + 1] = (uint8_t)((C >> 8) & 0xff);			\
+	A[B + 2] = (uint8_t)((C >> 16) & 0xff);			\
+	A[B + 3] = (uint8_t)((C >> 24) & 0xff);			\
+} while (0)
 
 // Reset the state to the empty message.
-#define MichaelClear( A ) 	A->L = A->K0; \
-				A->R = A->K1; \
-				A->nBytesInM = 0;
+#define MichaelClear(A)			\
+do {					\
+	A->L = A->K0;			\
+	A->R = A->K1;			\
+	A->nBytesInM = 0;		\
+} while (0)
 
 static
 void MichaelInitializeFunction(struct michel_mic_t *Mic, uint8_t * key)
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c
index 07ec540946cd..cbc9a9c5385f 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c
@@ -1468,11 +1468,6 @@ ksocknal_close_conn_locked(struct ksock_conn *conn, int error)
 
 		conn->ksnc_route = NULL;
 
-#if 0	   /* irrelevant with only eager routes */
-		/* make route least favourite */
-		list_del(&route->ksnr_list);
-		list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
-#endif
 		ksocknal_route_decref(route);     /* drop conn's ref on route */
 	}
 
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
index 303576d815c6..d53da552bd61 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
@@ -2008,13 +2008,6 @@ ksocknal_connect(struct ksock_route *route)
 		list_splice_init(&peer->ksnp_tx_queue, &zombies);
 	}
 
-#if 0	   /* irrelevant with only eager routes */
-	if (!route->ksnr_deleted) {
-		/* make this route least-favourite for re-selection */
-		list_del(&route->ksnr_list);
-		list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
-	}
-#endif
 	write_unlock_bh(&ksocknal_data.ksnd_global_lock);
 
 	ksocknal_peer_failed(peer);
diff --git a/drivers/staging/lustre/lnet/lnet/lib-msg.c b/drivers/staging/lustre/lnet/lnet/lib-msg.c
index 910e106e221d..0897e588bd54 100644
--- a/drivers/staging/lustre/lnet/lnet/lib-msg.c
+++ b/drivers/staging/lustre/lnet/lnet/lib-msg.c
@@ -449,23 +449,7 @@ lnet_finalize(lnet_ni_t *ni, lnet_msg_t *msg, int status)
 
 	if (!msg)
 		return;
-#if 0
-	CDEBUG(D_WARNING, "%s msg->%s Flags:%s%s%s%s%s%s%s%s%s%s%s txp %s rxp %s\n",
-	       lnet_msgtyp2str(msg->msg_type), libcfs_id2str(msg->msg_target),
-	       msg->msg_target_is_router ? "t" : "",
-	       msg->msg_routing ? "X" : "",
-	       msg->msg_ack ? "A" : "",
-	       msg->msg_sending ? "S" : "",
-	       msg->msg_receiving ? "R" : "",
-	       msg->msg_delayed ? "d" : "",
-	       msg->msg_txcredit ? "C" : "",
-	       msg->msg_peertxcredit ? "c" : "",
-	       msg->msg_rtrcredit ? "F" : "",
-	       msg->msg_peerrtrcredit ? "f" : "",
-	       msg->msg_onactivelist ? "!" : "",
-	       !msg->msg_txpeer ? "<none>" : libcfs_nid2str(msg->msg_txpeer->lp_nid),
-	       !msg->msg_rxpeer ? "<none>" : libcfs_nid2str(msg->msg_rxpeer->lp_nid));
-#endif
+
 	msg->msg_ev.status = status;
 
 	if (msg->msg_md) {
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 57281b9e31ff..58a7401046e0 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -3213,10 +3213,10 @@ const struct inode_operations ll_file_inode_operations = {
 	.setattr	= ll_setattr,
 	.getattr	= ll_getattr,
 	.permission	= ll_inode_permission,
-	.setxattr	= ll_setxattr,
-	.getxattr	= ll_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= ll_listxattr,
-	.removexattr	= ll_removexattr,
+	.removexattr	= generic_removexattr,
 	.fiemap		= ll_fiemap,
 	.get_acl	= ll_get_acl,
 };
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index 4d6d589a1677..27d3f7706d44 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -42,6 +42,7 @@
 #include "../include/lustre_mdc.h"
 #include "../include/lustre_intent.h"
 #include <linux/compat.h>
+#include <linux/xattr.h>
 #include <linux/posix_acl_xattr.h>
 #include "vvp_internal.h"
 
@@ -933,12 +934,9 @@ static inline __u64 ll_file_maxbytes(struct inode *inode)
 }
 
 /* llite/xattr.c */
-int ll_setxattr(struct dentry *dentry, struct inode *inode,
-		const char *name, const void *value, size_t size, int flags);
-ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
-		    const char *name, void *buffer, size_t size);
+extern const struct xattr_handler *ll_xattr_handlers[];
+
 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int ll_removexattr(struct dentry *dentry, const char *name);
 
 /**
  * Common IO arguments for various VFS I/O interfaces.
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 546063e728db..75d568f5bb90 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -418,6 +418,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 
 	sb->s_op = &lustre_super_operations;
+	sb->s_xattr = ll_xattr_handlers;
 #if THREAD_SIZE >= 8192 /*b=17630*/
 	sb->s_export_op = &lustre_export_operations;
 #endif
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index 2c4dc69731e8..09e180170de2 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -1106,10 +1106,10 @@ const struct inode_operations ll_dir_inode_operations = {
 	.setattr	    = ll_setattr,
 	.getattr	    = ll_getattr,
 	.permission	 = ll_inode_permission,
-	.setxattr	   = ll_setxattr,
-	.getxattr	   = ll_getxattr,
+	.setxattr	   = generic_setxattr,
+	.getxattr	   = generic_getxattr,
 	.listxattr	  = ll_listxattr,
-	.removexattr	= ll_removexattr,
+	.removexattr	= generic_removexattr,
 	.get_acl	    = ll_get_acl,
 };
 
@@ -1117,9 +1117,9 @@ const struct inode_operations ll_special_inode_operations = {
 	.setattr	= ll_setattr,
 	.getattr	= ll_getattr,
 	.permission     = ll_inode_permission,
-	.setxattr       = ll_setxattr,
-	.getxattr       = ll_getxattr,
+	.setxattr       = generic_setxattr,
+	.getxattr       = generic_getxattr,
 	.listxattr      = ll_listxattr,
-	.removexattr    = ll_removexattr,
+	.removexattr    = generic_removexattr,
 	.get_acl	    = ll_get_acl,
 };
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c
index 8c8bdfe1ad71..4601be94dd22 100644
--- a/drivers/staging/lustre/lustre/llite/symlink.c
+++ b/drivers/staging/lustre/lustre/llite/symlink.c
@@ -155,8 +155,8 @@ const struct inode_operations ll_fast_symlink_inode_operations = {
 	.get_link	= ll_get_link,
 	.getattr	= ll_getattr,
 	.permission	= ll_inode_permission,
-	.setxattr	= ll_setxattr,
-	.getxattr	= ll_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= ll_listxattr,
-	.removexattr	= ll_removexattr,
+	.removexattr	= generic_removexattr,
 };
diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index 98303cf85815..a02b80269b5c 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -99,46 +99,57 @@ int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
 	return 0;
 }
 
-static
-int ll_setxattr_common(struct inode *inode, const char *name,
-		       const void *value, size_t size,
-		       int flags, __u64 valid)
+static int
+ll_xattr_set_common(const struct xattr_handler *handler,
+		    struct dentry *dentry, struct inode *inode,
+		    const char *name, const void *value, size_t size,
+		    int flags)
 {
+	char fullname[strlen(handler->prefix) + strlen(name) + 1];
 	struct ll_sb_info *sbi = ll_i2sbi(inode);
 	struct ptlrpc_request *req = NULL;
-	int xattr_type, rc;
 	const char *pv = value;
+	__u64 valid;
+	int rc;
+
+	if (flags == XATTR_REPLACE) {
+		ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
+		valid = OBD_MD_FLXATTRRM;
+	} else {
+		ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
+		valid = OBD_MD_FLXATTR;
+	}
 
-	xattr_type = get_xattr_type(name);
-	rc = xattr_type_filter(sbi, xattr_type);
+	rc = xattr_type_filter(sbi, handler->flags);
 	if (rc)
 		return rc;
 
-	if ((xattr_type == XATTR_ACL_ACCESS_T ||
-	     xattr_type == XATTR_ACL_DEFAULT_T) &&
+	if ((handler->flags == XATTR_ACL_ACCESS_T ||
+	     handler->flags == XATTR_ACL_DEFAULT_T) &&
 	    !inode_owner_or_capable(inode))
 		return -EPERM;
 
 	/* b10667: ignore lustre special xattr for now */
-	if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
-	    (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
+	if ((handler->flags == XATTR_TRUSTED_T && !strcmp(name, "lov")) ||
+	    (handler->flags == XATTR_LUSTRE_T && !strcmp(name, "lov")))
 		return 0;
 
 	/* b15587: ignore security.capability xattr for now */
-	if ((xattr_type == XATTR_SECURITY_T &&
-	     strcmp(name, "security.capability") == 0))
+	if ((handler->flags == XATTR_SECURITY_T &&
+	     !strcmp(name, "capability")))
 		return 0;
 
 	/* LU-549:  Disable security.selinux when selinux is disabled */
-	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
-	    strcmp(name, "security.selinux") == 0)
+	if (handler->flags == XATTR_SECURITY_T && !selinux_is_enabled() &&
+	    strcmp(name, "selinux") == 0)
 		return -EOPNOTSUPP;
 
+	sprintf(fullname, "%s%s\n", handler->prefix, name);
 	rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode),
-			 valid, name, pv, size, 0, flags,
+			 valid, fullname, pv, size, 0, flags,
 			 ll_i2suppgid(inode), &req);
 	if (rc) {
-		if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
+		if (rc == -EOPNOTSUPP && handler->flags == XATTR_USER_T) {
 			LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
 			sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 		}
@@ -149,8 +160,10 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	return 0;
 }
 
-int ll_setxattr(struct dentry *dentry, struct inode *inode,
-		const char *name, const void *value, size_t size, int flags)
+static int ll_xattr_set(const struct xattr_handler *handler,
+			struct dentry *dentry, struct inode *inode,
+			const char *name, const void *value, size_t size,
+			int flags)
 {
 	LASSERT(inode);
 	LASSERT(name);
@@ -158,20 +171,24 @@ int ll_setxattr(struct dentry *dentry, struct inode *inode,
 	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
 	       PFID(ll_inode2fid(inode)), inode, name);
 
-	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
-
-	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
-		     sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
-	     strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
-	    (strncmp(name, XATTR_LUSTRE_PREFIX,
-		     sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
-	     strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
+	if (!strcmp(name, "lov")) {
 		struct lov_user_md *lump = (struct lov_user_md *)value;
+		int op_type = flags == XATTR_REPLACE ? LPROC_LL_REMOVEXATTR :
+						       LPROC_LL_SETXATTR;
 		int rc = 0;
 
+		ll_stats_ops_tally(ll_i2sbi(inode), op_type, 1);
+
 		if (size != 0 && size < sizeof(struct lov_user_md))
 			return -EINVAL;
 
+		/*
+		 * It is possible to set an xattr to a "" value of zero size.
+		 * For this case we are going to treat it as a removal.
+		 */
+		if (!size && lump)
+			lump = NULL;
+
 		/* Attributes that are saved via getxattr will always have
 		 * the stripe_offset as 0.  Instead, the MDS should be
 		 * allowed to pick the starting OST index.   b=17846
@@ -194,92 +211,27 @@ int ll_setxattr(struct dentry *dentry, struct inode *inode,
 
 		return rc;
 
-	} else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
-		   strcmp(name, XATTR_NAME_LINK) == 0)
+	} else if (!strcmp(name, "lma") || !strcmp(name, "link")) {
+		ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
 		return 0;
+	}
 
-	return ll_setxattr_common(inode, name, value, size, flags,
-				  OBD_MD_FLXATTR);
-}
-
-int ll_removexattr(struct dentry *dentry, const char *name)
-{
-	struct inode *inode = d_inode(dentry);
-
-	LASSERT(inode);
-	LASSERT(name);
-
-	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
-	       PFID(ll_inode2fid(inode)), inode, name);
-
-	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
-	return ll_setxattr_common(inode, name, NULL, 0, 0,
-				  OBD_MD_FLXATTRRM);
+	return ll_xattr_set_common(handler, dentry, inode, name, value, size,
+				   flags);
 }
 
-static
-int ll_getxattr_common(struct inode *inode, const char *name,
-		       void *buffer, size_t size, __u64 valid)
+static int
+ll_xattr_list(struct inode *inode, const char *name, int type, void *buffer,
+	      size_t size, __u64 valid)
 {
+	struct ll_inode_info *lli = ll_i2info(inode);
 	struct ll_sb_info *sbi = ll_i2sbi(inode);
 	struct ptlrpc_request *req = NULL;
 	struct mdt_body *body;
-	int xattr_type, rc;
 	void *xdata;
-	struct ll_inode_info *lli = ll_i2info(inode);
-
-	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
-	       PFID(ll_inode2fid(inode)), inode);
-
-	/* listxattr have slightly different behavior from of ext3:
-	 * without 'user_xattr' ext3 will list all xattr names but
-	 * filtered out "^user..*"; we list them all for simplicity.
-	 */
-	if (!name) {
-		xattr_type = XATTR_OTHER_T;
-		goto do_getxattr;
-	}
-
-	xattr_type = get_xattr_type(name);
-	rc = xattr_type_filter(sbi, xattr_type);
-	if (rc)
-		return rc;
-
-	/* b15587: ignore security.capability xattr for now */
-	if ((xattr_type == XATTR_SECURITY_T &&
-	     strcmp(name, "security.capability") == 0))
-		return -ENODATA;
-
-	/* LU-549:  Disable security.selinux when selinux is disabled */
-	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
-	    strcmp(name, "security.selinux") == 0)
-		return -EOPNOTSUPP;
-
-#ifdef CONFIG_FS_POSIX_ACL
-	/* posix acl is under protection of LOOKUP lock. when calling to this,
-	 * we just have path resolution to the target inode, so we have great
-	 * chance that cached ACL is uptodate.
-	 */
-	if (xattr_type == XATTR_ACL_ACCESS_T) {
-		struct posix_acl *acl;
-
-		spin_lock(&lli->lli_lock);
-		acl = posix_acl_dup(lli->lli_posix_acl);
-		spin_unlock(&lli->lli_lock);
-
-		if (!acl)
-			return -ENODATA;
+	int rc;
 
-		rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
-		posix_acl_release(acl);
-		return rc;
-	}
-	if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
-		return -ENODATA;
-#endif
-
-do_getxattr:
-	if (sbi->ll_xattr_cache_enabled && xattr_type != XATTR_ACL_ACCESS_T) {
+	if (sbi->ll_xattr_cache_enabled && type != XATTR_ACL_ACCESS_T) {
 		rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
 		if (rc == -EAGAIN)
 			goto getxattr_nocache;
@@ -340,7 +292,7 @@ getxattr_nocache:
 	}
 
 out_xattr:
-	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
+	if (rc == -EOPNOTSUPP && type == XATTR_USER_T) {
 		LCONSOLE_INFO(
 			"%s: disabling user_xattr feature because it is not supported on the server: rc = %d\n",
 			ll_get_fsname(inode->i_sb, NULL, 0), rc);
@@ -351,8 +303,63 @@ out:
 	return rc;
 }
 
-ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
-		    const char *name, void *buffer, size_t size)
+static int ll_xattr_get_common(const struct xattr_handler *handler,
+			       struct dentry *dentry, struct inode *inode,
+			       const char *name, void *buffer, size_t size)
+{
+	char fullname[strlen(handler->prefix) + strlen(name) + 1];
+	struct ll_sb_info *sbi = ll_i2sbi(inode);
+	struct ll_inode_info *lli = ll_i2info(inode);
+	int rc;
+
+	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
+	       PFID(ll_inode2fid(inode)), inode);
+
+	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
+
+	rc = xattr_type_filter(sbi, handler->flags);
+	if (rc)
+		return rc;
+
+	/* b15587: ignore security.capability xattr for now */
+	if ((handler->flags == XATTR_SECURITY_T && !strcmp(name, "capability")))
+		return -ENODATA;
+
+	/* LU-549:  Disable security.selinux when selinux is disabled */
+	if (handler->flags == XATTR_SECURITY_T && !selinux_is_enabled() &&
+	    !strcmp(name, "selinux"))
+		return -EOPNOTSUPP;
+
+#ifdef CONFIG_FS_POSIX_ACL
+	/* posix acl is under protection of LOOKUP lock. when calling to this,
+	 * we just have path resolution to the target inode, so we have great
+	 * chance that cached ACL is uptodate.
+	 */
+	if (handler->flags == XATTR_ACL_ACCESS_T) {
+		struct posix_acl *acl;
+
+		spin_lock(&lli->lli_lock);
+		acl = posix_acl_dup(lli->lli_posix_acl);
+		spin_unlock(&lli->lli_lock);
+
+		if (!acl)
+			return -ENODATA;
+
+		rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
+		posix_acl_release(acl);
+		return rc;
+	}
+	if (handler->flags == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
+		return -ENODATA;
+#endif
+	sprintf(fullname, "%s%s\n", handler->prefix, name);
+	return ll_xattr_list(inode, fullname, handler->flags, buffer, size,
+			     OBD_MD_FLXATTR);
+}
+
+static int ll_xattr_get(const struct xattr_handler *handler,
+			struct dentry *dentry, struct inode *inode,
+			const char *name, void *buffer, size_t size)
 {
 	LASSERT(inode);
 	LASSERT(name);
@@ -360,20 +367,15 @@ ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
 	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
 	       PFID(ll_inode2fid(inode)), inode, name);
 
-	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
-
-	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
-		     sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
-	     strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
-	    (strncmp(name, XATTR_LUSTRE_PREFIX,
-		     sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
-	     strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
+	if (!strcmp(name, "lov")) {
 		struct lov_stripe_md *lsm;
 		struct lov_user_md *lump;
 		struct lov_mds_md *lmm = NULL;
 		struct ptlrpc_request *request = NULL;
 		int rc = 0, lmmsize = 0;
 
+		ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
+
 		if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
 			return -ENODATA;
 
@@ -439,7 +441,7 @@ out:
 		return rc;
 	}
 
-	return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
+	return ll_xattr_get_common(handler, dentry, inode, name, buffer, size);
 }
 
 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
@@ -457,7 +459,8 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 
 	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
 
-	rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
+	rc = ll_xattr_list(inode, NULL, XATTR_OTHER_T, buffer, size,
+			   OBD_MD_FLXATTRLS);
 	if (rc < 0)
 		goto out;
 
@@ -518,3 +521,57 @@ out:
 
 	return rc;
 }
+
+static const struct xattr_handler ll_user_xattr_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.flags = XATTR_USER_T,
+	.get = ll_xattr_get_common,
+	.set = ll_xattr_set_common,
+};
+
+static const struct xattr_handler ll_trusted_xattr_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.flags = XATTR_TRUSTED_T,
+	.get = ll_xattr_get,
+	.set = ll_xattr_set,
+};
+
+static const struct xattr_handler ll_security_xattr_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.flags = XATTR_SECURITY_T,
+	.get = ll_xattr_get_common,
+	.set = ll_xattr_set_common,
+};
+
+static const struct xattr_handler ll_acl_access_xattr_handler = {
+	.prefix = XATTR_NAME_POSIX_ACL_ACCESS,
+	.flags = XATTR_ACL_ACCESS_T,
+	.get = ll_xattr_get_common,
+	.set = ll_xattr_set_common,
+};
+
+static const struct xattr_handler ll_acl_default_xattr_handler = {
+	.prefix = XATTR_NAME_POSIX_ACL_DEFAULT,
+	.flags = XATTR_ACL_DEFAULT_T,
+	.get = ll_xattr_get_common,
+	.set = ll_xattr_set_common,
+};
+
+static const struct xattr_handler ll_lustre_xattr_handler = {
+	.prefix = XATTR_LUSTRE_PREFIX,
+	.flags = XATTR_LUSTRE_T,
+	.get = ll_xattr_get,
+	.set = ll_xattr_set,
+};
+
+const struct xattr_handler *ll_xattr_handlers[] = {
+	&ll_user_xattr_handler,
+	&ll_trusted_xattr_handler,
+	&ll_security_xattr_handler,
+#ifdef CONFIG_FS_POSIX_ACL
+	&ll_acl_access_xattr_handler,
+	&ll_acl_default_xattr_handler,
+#endif
+	&ll_lustre_xattr_handler,
+	NULL,
+};
diff --git a/drivers/staging/media/lirc/lirc_imon.c b/drivers/staging/media/lirc/lirc_imon.c
index ff1926ca1f96..a183e68ec320 100644
--- a/drivers/staging/media/lirc/lirc_imon.c
+++ b/drivers/staging/media/lirc/lirc_imon.c
@@ -797,16 +797,11 @@ static int imon_probe(struct usb_interface *interface,
 		goto free_rbuf;
 	}
 	rx_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!rx_urb) {
-		dev_err(dev, "%s: usb_alloc_urb failed for IR urb\n", __func__);
+	if (!rx_urb)
 		goto free_lirc_buf;
-	}
 	tx_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!tx_urb) {
-		dev_err(dev, "%s: usb_alloc_urb failed for display urb\n",
-		    __func__);
+	if (!tx_urb)
 		goto free_rx_urb;
-	}
 
 	mutex_init(&context->ctx_lock);
 	context->vfd_proto_6p = vfd_proto_6p;
diff --git a/drivers/staging/media/lirc/lirc_sasem.c b/drivers/staging/media/lirc/lirc_sasem.c
index 2218d0042030..b080fde6d740 100644
--- a/drivers/staging/media/lirc/lirc_sasem.c
+++ b/drivers/staging/media/lirc/lirc_sasem.c
@@ -758,17 +758,12 @@ static int sasem_probe(struct usb_interface *interface,
 	}
 	rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 	if (!rx_urb) {
-		dev_err(&interface->dev,
-			"%s: usb_alloc_urb failed for IR urb\n", __func__);
 		alloc_status = 5;
 		goto alloc_status_switch;
 	}
 	if (vfd_ep_found) {
 		tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 		if (!tx_urb) {
-			dev_err(&interface->dev,
-				"%s: usb_alloc_urb failed for VFD urb",
-				__func__);
 			alloc_status = 6;
 			goto alloc_status_switch;
 		}
diff --git a/drivers/staging/most/hdm-usb/hdm_usb.c b/drivers/staging/most/hdm-usb/hdm_usb.c
index aeae071f2823..9ec29788c047 100644
--- a/drivers/staging/most/hdm-usb/hdm_usb.c
+++ b/drivers/staging/most/hdm-usb/hdm_usb.c
@@ -650,10 +650,8 @@ static int hdm_enqueue(struct most_interface *iface, int channel,
 		return -ENODEV;
 
 	urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_ATOMIC);
-	if (!urb) {
-		dev_err(dev, "Failed to allocate URB\n");
+	if (!urb)
 		return -ENOMEM;
-	}
 
 	anchor = kzalloc(sizeof(*anchor), GFP_ATOMIC);
 	if (!anchor) {
diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index dd0970facdf5..7af1af8c6616 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -1702,11 +1702,8 @@ short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
 		}
 		if (bSend0Byte) {
 			tx_urb_zero = usb_alloc_urb(0, GFP_ATOMIC);
-			if (!tx_urb_zero) {
-				RT_TRACE(COMP_ERR,
-					 "can't alloc urb for zero byte\n");
+			if (!tx_urb_zero)
 				return -ENOMEM;
-			}
 			usb_fill_bulk_urb(tx_urb_zero, udev,
 					  usb_sndbulkpipe(udev, idx_pipe),
 					  &zero, 0, tx_zero_isr, dev);
diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index ac4fecb30d0e..0594828bdabf 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -440,10 +440,8 @@ static bool vnt_alloc_bufs(struct vnt_private *priv)
 
 		/* allocate URBs */
 		tx_context->urb = usb_alloc_urb(0, GFP_KERNEL);
-		if (!tx_context->urb) {
-			dev_err(&priv->usb->dev, "alloc tx urb failed\n");
+		if (!tx_context->urb)
 			goto free_tx;
-		}
 
 		tx_context->in_use = false;
 	}
@@ -462,10 +460,8 @@ static bool vnt_alloc_bufs(struct vnt_private *priv)
 
 		/* allocate URBs */
 		rcb->urb = usb_alloc_urb(0, GFP_KERNEL);
-		if (!rcb->urb) {
-			dev_err(&priv->usb->dev, "Failed to alloc rx urb\n");
+		if (!rcb->urb)
 			goto free_rx_tx;
-		}
 
 		rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
 		if (!rcb->skb)
@@ -479,10 +475,8 @@ static bool vnt_alloc_bufs(struct vnt_private *priv)
 	}
 
 	priv->interrupt_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!priv->interrupt_urb) {
-		dev_err(&priv->usb->dev, "Failed to alloc int urb\n");
+	if (!priv->interrupt_urb)
 		goto free_rx_tx;
-	}
 
 	priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
 	if (!priv->int_buf.data_buf) {