ext4: Change unsigned long to unsigned int

Convert the unsigned longs that are most responsible for bloating the
stack usage on 64-bit systems.

Nearly all places in the ext3/4 code which uses "unsigned long" is
probably a bug, since on 32-bit systems a ulong a 32-bits, which means
we are wasting stack space on 64-bit systems.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 10 insertions, 12 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e9aacecfbf41..558545d1fead 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -94,9 +94,9 @@ struct ext4_allocation_request {
         /* phys. block for ^^^ */
         ext4_fsblk_t pright;
         /* how many blocks we want to allocate */
-        unsigned long len;
+        unsigned int len;
         /* flags. see above EXT4_MB_HINT_* */
-        unsigned long flags;
+        unsigned int flags;
 };
 
 /*
@@ -997,6 +997,9 @@ do {									\
 # define ATTRIB_NORET   __attribute__((noreturn))
 # define NORET_AND      noreturn,
 
+/* bitmap.c */
+extern unsigned int ext4_count_free(struct buffer_head *, unsigned);
+
 /* balloc.c */
 extern unsigned int ext4_block_group(struct super_block *sb,
                         ext4_fsblk_t blocknr);
@@ -1024,7 +1027,7 @@ extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
 /* dir.c */
 extern int ext4_check_dir_entry(const char *, struct inode *,
                                 struct ext4_dir_entry_2 *,
-                                struct buffer_head *, unsigned long);
+                                struct buffer_head *, unsigned int);
 extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
                                     __u32 minor_hash,
                                     struct ext4_dir_entry_2 *dirent);
@@ -1044,7 +1047,6 @@ extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
 extern unsigned long ext4_count_free_inodes(struct super_block *);
 extern unsigned long ext4_count_dirs(struct super_block *);
 extern void ext4_check_inodes_bitmap(struct super_block *);
-extern unsigned long ext4_count_free(struct buffer_head *, unsigned);
 
 /* mballoc.c */
 extern long ext4_mb_stats;
@@ -1074,10 +1076,6 @@ struct buffer_head *ext4_bread(handle_t *, struct inode *,
                                                 ext4_lblk_t, int, int *);
 int ext4_get_block(struct inode *inode, sector_t iblock,
                                 struct buffer_head *bh_result, int create);
-int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
-                                ext4_lblk_t iblock, unsigned long maxblocks,
-                                struct buffer_head *bh_result,
-                                int create, int extend_disksize);
 
 extern struct inode *ext4_iget(struct super_block *, unsigned long);
 extern int  ext4_write_inode(struct inode *, int);
@@ -1276,16 +1274,16 @@ extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
 extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
                                        int chunk);
 extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
-                        ext4_lblk_t iblock,
-                        unsigned long max_blocks, struct buffer_head *bh_result,
-                        int create, int extend_disksize);
+                               ext4_lblk_t iblock, unsigned int max_blocks,
+                               struct buffer_head *bh_result,
+                               int create, int extend_disksize);
 extern void ext4_ext_truncate(struct inode *);
 extern void ext4_ext_init(struct super_block *);
 extern void ext4_ext_release(struct super_block *);
 extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
                           loff_t len);
 extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode,
-                        sector_t block, unsigned long max_blocks,
+                        sector_t block, unsigned int max_blocks,
                         struct buffer_head *bh, int create,
                         int extend_disksize, int flag);
 #endif  /* __KERNEL__ */