Merge branch 'akpm' (patches from Andrew Morton)

Merge misc fixes from Andrew Morton:
 "Nine fixes"

* emailed patches from Andrew Morton akpm@linux-foundation.org>:
  cris: convert ffs from an object-like macro to a function-like macro
  hfsplus: add HFSX subfolder count support
  tools/testing/selftests/ipc/msgque.c: handle msgget failure return correctly
  MAINTAINERS: blackfin: add git repository
  revert "kallsyms: fix absolute addresses for kASLR"
  mm/Kconfig: fix URL for zsmalloc benchmark
  fs/proc/base.c: fix GPF in /proc/$PID/map_files
  mm/compaction: break out of loop on !PageBuddy in isolate_freepages_block
  mm: fix GFP_THISNODE callers and clarify

5 files changed, 56 insertions, 2 deletions

diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c
index 968ce411db53..32602c667b4a 100644
--- a/fs/hfsplus/catalog.c
+++ b/fs/hfsplus/catalog.c
@@ -103,6 +103,8 @@ static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
 		folder = &entry->folder;
 		memset(folder, 0, sizeof(*folder));
 		folder->type = cpu_to_be16(HFSPLUS_FOLDER);
+		if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags))
+			folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT);
 		folder->id = cpu_to_be32(inode->i_ino);
 		HFSPLUS_I(inode)->create_date =
 			folder->create_date =
@@ -203,6 +205,36 @@ int hfsplus_find_cat(struct super_block *sb, u32 cnid,
 	return hfs_brec_find(fd, hfs_find_rec_by_key);
 }
 
+static void hfsplus_subfolders_inc(struct inode *dir)
+{
+	struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
+
+	if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
+		/*
+		 * Increment subfolder count. Note, the value is only meaningful
+		 * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
+		 */
+		HFSPLUS_I(dir)->subfolders++;
+	}
+}
+
+static void hfsplus_subfolders_dec(struct inode *dir)
+{
+	struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
+
+	if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
+		/*
+		 * Decrement subfolder count. Note, the value is only meaningful
+		 * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
+		 *
+		 * Check for zero. Some subfolders may have been created
+		 * by an implementation ignorant of this counter.
+		 */
+		if (HFSPLUS_I(dir)->subfolders)
+			HFSPLUS_I(dir)->subfolders--;
+	}
+}
+
 int hfsplus_create_cat(u32 cnid, struct inode *dir,
 		struct qstr *str, struct inode *inode)
 {
@@ -247,6 +279,8 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir,
 		goto err1;
 
 	dir->i_size++;
+	if (S_ISDIR(inode->i_mode))
+		hfsplus_subfolders_inc(dir);
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
 	hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
 
@@ -336,6 +370,8 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
 		goto out;
 
 	dir->i_size--;
+	if (type == HFSPLUS_FOLDER)
+		hfsplus_subfolders_dec(dir);
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
 	hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
 
@@ -380,6 +416,7 @@ int hfsplus_rename_cat(u32 cnid,
 
 	hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
 				src_fd.entrylength);
+	type = be16_to_cpu(entry.type);
 
 	/* create new dir entry with the data from the old entry */
 	hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
@@ -394,6 +431,8 @@ int hfsplus_rename_cat(u32 cnid,
 	if (err)
 		goto out;
 	dst_dir->i_size++;
+	if (type == HFSPLUS_FOLDER)
+		hfsplus_subfolders_inc(dst_dir);
 	dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
 
 	/* finally remove the old entry */
@@ -405,6 +444,8 @@ int hfsplus_rename_cat(u32 cnid,
 	if (err)
 		goto out;
 	src_dir->i_size--;
+	if (type == HFSPLUS_FOLDER)
+		hfsplus_subfolders_dec(src_dir);
 	src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
 
 	/* remove old thread entry */
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 08846425b67f..62d571eb69ba 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -242,6 +242,7 @@ struct hfsplus_inode_info {
 	 */
 	sector_t fs_blocks;
 	u8 userflags;		/* BSD user file flags */
+	u32 subfolders;		/* Subfolder count (HFSX only) */
 	struct list_head open_dir_list;
 	loff_t phys_size;
 
diff --git a/fs/hfsplus/hfsplus_raw.h b/fs/hfsplus/hfsplus_raw.h
index 8ffb3a8ffe75..5a126828d85e 100644
--- a/fs/hfsplus/hfsplus_raw.h
+++ b/fs/hfsplus/hfsplus_raw.h
@@ -261,7 +261,7 @@ struct hfsplus_cat_folder {
 	struct DInfo user_info;
 	struct DXInfo finder_info;
 	__be32 text_encoding;
-	u32 reserved;
+	__be32 subfolders;	/* Subfolder count in HFSX. Reserved in HFS+. */
 } __packed;
 
 /* HFS file info (stolen from hfs.h) */
@@ -301,11 +301,13 @@ struct hfsplus_cat_file {
 	struct hfsplus_fork_raw rsrc_fork;
 } __packed;
 
-/* File attribute bits */
+/* File and folder flag bits */
 #define HFSPLUS_FILE_LOCKED		0x0001
 #define HFSPLUS_FILE_THREAD_EXISTS	0x0002
 #define HFSPLUS_XATTR_EXISTS		0x0004
 #define HFSPLUS_ACL_EXISTS		0x0008
+#define HFSPLUS_HAS_FOLDER_COUNT	0x0010	/* Folder has subfolder count
+						 * (HFSX only) */
 
 /* HFS+ catalog thread (part of a cat_entry) */
 struct hfsplus_cat_thread {
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index fa929f325f87..a4f45bd88a63 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -375,6 +375,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
 	hip->extent_state = 0;
 	hip->flags = 0;
 	hip->userflags = 0;
+	hip->subfolders = 0;
 	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 	hip->alloc_blocks = 0;
@@ -494,6 +495,10 @@ int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 		inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 		HFSPLUS_I(inode)->create_date = folder->create_date;
 		HFSPLUS_I(inode)->fs_blocks = 0;
+		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
+			HFSPLUS_I(inode)->subfolders =
+				be32_to_cpu(folder->subfolders);
+		}
 		inode->i_op = &hfsplus_dir_inode_operations;
 		inode->i_fop = &hfsplus_dir_operations;
 	} else if (type == HFSPLUS_FILE) {
@@ -566,6 +571,10 @@ int hfsplus_cat_write_inode(struct inode *inode)
 		folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 		folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 		folder->valence = cpu_to_be32(inode->i_size - 2);
+		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
+			folder->subfolders =
+				cpu_to_be32(HFSPLUS_I(inode)->subfolders);
+		}
 		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 					 sizeof(struct hfsplus_cat_folder));
 	} else if (HFSPLUS_IS_RSRC(inode)) {
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 51507065263b..b9760628e1fd 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1824,6 +1824,7 @@ static int proc_map_files_get_link(struct dentry *dentry, struct path *path)
 	if (rc)
 		goto out_mmput;
 
+	rc = -ENOENT;
 	down_read(&mm->mmap_sem);
 	vma = find_exact_vma(mm, vm_start, vm_end);
 	if (vma && vma->vm_file) {