Merge branch 'akpm' (second patch-bomb from Andrew)

Merge second patchbomb from Andrew Morton:
 - the rest of MM
 - misc fs fixes
 - add execveat() syscall
 - new ratelimit feature for fault-injection
 - decompressor updates
 - ipc/ updates
 - fallocate feature creep
 - fsnotify cleanups
 - a few other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (99 commits)
  cgroups: Documentation: fix trivial typos and wrong paragraph numberings
  parisc: percpu: update comments referring to __get_cpu_var
  percpu: update local_ops.txt to reflect this_cpu operations
  percpu: remove __get_cpu_var and __raw_get_cpu_var macros
  fsnotify: remove destroy_list from fsnotify_mark
  fsnotify: unify inode and mount marks handling
  fallocate: create FAN_MODIFY and IN_MODIFY events
  mm/cma: make kmemleak ignore CMA regions
  slub: fix cpuset check in get_any_partial
  slab: fix cpuset check in fallback_alloc
  shmdt: use i_size_read() instead of ->i_size
  ipc/shm.c: fix overly aggressive shmdt() when calls span multiple segments
  ipc/msg: increase MSGMNI, remove scaling
  ipc/sem.c: increase SEMMSL, SEMMNI, SEMOPM
  ipc/sem.c: change memory barrier in sem_lock() to smp_rmb()
  lib/decompress.c: consistency of compress formats for kernel image
  decompress_bunzip2: off by one in get_next_block()
  usr/Kconfig: make initrd compression algorithm selection not expert
  fault-inject: add ratelimit option
  ratelimit: add initialization macro
  ...

1 files changed, 9 insertions, 14 deletions

diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index d8d9fe3f685c..0d105aeff82f 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -155,22 +155,14 @@ xip_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
 EXPORT_SYMBOL_GPL(xip_file_read);
 
 /*
- * __xip_unmap is invoked from xip_unmap and
- * xip_write
+ * __xip_unmap is invoked from xip_unmap and xip_write
  *
  * This function walks all vmas of the address_space and unmaps the
  * __xip_sparse_page when found at pgoff.
  */
-static void
-__xip_unmap (struct address_space * mapping,
-		     unsigned long pgoff)
+static void __xip_unmap(struct address_space * mapping, unsigned long pgoff)
 {
 	struct vm_area_struct *vma;
-	struct mm_struct *mm;
-	unsigned long address;
-	pte_t *pte;
-	pte_t pteval;
-	spinlock_t *ptl;
 	struct page *page;
 	unsigned count;
 	int locked = 0;
@@ -182,11 +174,14 @@ __xip_unmap (struct address_space * mapping,
 		return;
 
 retry:
-	mutex_lock(&mapping->i_mmap_mutex);
+	i_mmap_lock_read(mapping);
 	vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
-		mm = vma->vm_mm;
-		address = vma->vm_start +
+		pte_t *pte, pteval;
+		spinlock_t *ptl;
+		struct mm_struct *mm = vma->vm_mm;
+		unsigned long address = vma->vm_start +
 			((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
+
 		BUG_ON(address < vma->vm_start || address >= vma->vm_end);
 		pte = page_check_address(page, mm, address, &ptl, 1);
 		if (pte) {
@@ -202,7 +197,7 @@ retry:
 			page_cache_release(page);
 		}
 	}
-	mutex_unlock(&mapping->i_mmap_mutex);
+	i_mmap_unlock_read(mapping);
 
 	if (locked) {
 		mutex_unlock(&xip_sparse_mutex);