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hfsplus: convert the extents_lock in a mutex 

Apple Extended HFS file system: The semaphore extents lock is used as a
mutex.  Convert it to the mutex API.

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2008-07-25 01:46:36 -07:00 committed by Linus Torvalds
parent 39f8d472f2
commit 895c23f8c3
4 changed files with 12 additions and 11 deletions
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14
fs/hfsplus/extents.c
View File

@ -199,16 +199,16 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
goto done;
}
down(&HFSPLUS_I(inode).extents_lock);
mutex_lock(&HFSPLUS_I(inode).extents_lock);
res = hfsplus_ext_read_extent(inode, ablock);
if (!res) {
dblock = hfsplus_ext_find_block(HFSPLUS_I(inode).cached_extents, ablock -
HFSPLUS_I(inode).cached_start);
} else {
up(&HFSPLUS_I(inode).extents_lock);
mutex_unlock(&HFSPLUS_I(inode).extents_lock);
return -EIO;
}
up(&HFSPLUS_I(inode).extents_lock);
mutex_unlock(&HFSPLUS_I(inode).extents_lock);
done:
dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock);
@ -355,7 +355,7 @@ int hfsplus_file_extend(struct inode *inode)
return -ENOSPC;
}
down(&HFSPLUS_I(inode).extents_lock);
mutex_lock(&HFSPLUS_I(inode).extents_lock);
if (HFSPLUS_I(inode).alloc_blocks == HFSPLUS_I(inode).first_blocks)
goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).first_extents);
else {
@ -408,7 +408,7 @@ int hfsplus_file_extend(struct inode *inode)
goto insert_extent;
}
out:
up(&HFSPLUS_I(inode).extents_lock);
mutex_unlock(&HFSPLUS_I(inode).extents_lock);
if (!res) {
HFSPLUS_I(inode).alloc_blocks += len;
mark_inode_dirty(inode);
@ -465,7 +465,7 @@ void hfsplus_file_truncate(struct inode *inode)
if (blk_cnt == alloc_cnt)
goto out;
down(&HFSPLUS_I(inode).extents_lock);
mutex_lock(&HFSPLUS_I(inode).extents_lock);
hfs_find_init(HFSPLUS_SB(sb).ext_tree, &fd);
while (1) {
if (alloc_cnt == HFSPLUS_I(inode).first_blocks) {
@ -492,7 +492,7 @@ void hfsplus_file_truncate(struct inode *inode)
hfs_brec_remove(&fd);
}
hfs_find_exit(&fd);
up(&HFSPLUS_I(inode).extents_lock);
mutex_unlock(&HFSPLUS_I(inode).extents_lock);
HFSPLUS_I(inode).alloc_blocks = blk_cnt;
out:

3
fs/hfsplus/hfsplus_fs.h
View File

@ -11,6 +11,7 @@
#define _LINUX_HFSPLUS_FS_H
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include "hfsplus_raw.h"
@ -154,7 +155,7 @@ struct hfsplus_sb_info {
struct hfsplus_inode_info {
struct semaphore extents_lock;
struct mutex extents_lock;
u32 clump_blocks, alloc_blocks;
sector_t fs_blocks;
/* Allocation extents from catalog record or volume header */

4
fs/hfsplus/inode.c
View File

@ -163,7 +163,7 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dent
inode->i_ino = dir->i_ino;
INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
init_MUTEX(&HFSPLUS_I(inode).extents_lock);
mutex_init(&HFSPLUS_I(inode).extents_lock);
HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
@ -316,7 +316,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
inode->i_nlink = 1;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
init_MUTEX(&HFSPLUS_I(inode).extents_lock);
mutex_init(&HFSPLUS_I(inode).extents_lock);
atomic_set(&HFSPLUS_I(inode).opencnt, 0);
HFSPLUS_I(inode).flags = 0;
memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));

2
fs/hfsplus/super.c
View File

@ -34,7 +34,7 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
return inode;
INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
init_MUTEX(&HFSPLUS_I(inode).extents_lock);
mutex_init(&HFSPLUS_I(inode).extents_lock);
HFSPLUS_I(inode).flags = 0;
HFSPLUS_I(inode).rsrc_inode = NULL;
atomic_set(&HFSPLUS_I(inode).opencnt, 0);