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authorDmitri Vorobiev <dmitri.vorobiev@movial.fi>2008-07-25 19:44:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:03 -0700
commit3f165e4cf2af042af7d2440d688299c0d2a48b1f (patch)
treefe49b0b9771fb20b2be844e43bc8360e7b831aba /fs/bfs/inode.c
parent75b25b4cabb7ce956c36442bf8225659b1864866 (diff)
downloadop-kernel-dev-3f165e4cf2af042af7d2440d688299c0d2a48b1f.zip
op-kernel-dev-3f165e4cf2af042af7d2440d688299c0d2a48b1f.tar.gz
bfs: kill BKL
Replace the BKL-based locking scheme used in the bfs driver by a private filesystem-wide mutex. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi> Cc: Tigran Aivazian <tigran_aivazian@symantec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/bfs/inode.c')
-rw-r--r--fs/bfs/inode.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index c8b3982..053e690 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -104,6 +104,7 @@ static int bfs_write_inode(struct inode *inode, int unused)
struct bfs_inode *di;
struct buffer_head *bh;
int block, off;
+ struct bfs_sb_info *info = BFS_SB(inode->i_sb);
dprintf("ino=%08x\n", ino);
@@ -112,13 +113,13 @@ static int bfs_write_inode(struct inode *inode, int unused)
return -EIO;
}
- lock_kernel();
+ mutex_lock(&info->bfs_lock);
block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
bh = sb_bread(inode->i_sb, block);
if (!bh) {
printf("Unable to read inode %s:%08x\n",
inode->i_sb->s_id, ino);
- unlock_kernel();
+ mutex_unlock(&info->bfs_lock);
return -EIO;
}
@@ -145,7 +146,7 @@ static int bfs_write_inode(struct inode *inode, int unused)
mark_buffer_dirty(bh);
brelse(bh);
- unlock_kernel();
+ mutex_unlock(&info->bfs_lock);
return 0;
}
@@ -170,7 +171,7 @@ static void bfs_delete_inode(struct inode *inode)
inode->i_size = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
- lock_kernel();
+ mutex_lock(&info->bfs_lock);
mark_inode_dirty(inode);
block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
@@ -178,7 +179,7 @@ static void bfs_delete_inode(struct inode *inode)
if (!bh) {
printf("Unable to read inode %s:%08lx\n",
inode->i_sb->s_id, ino);
- unlock_kernel();
+ mutex_unlock(&info->bfs_lock);
return;
}
off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
@@ -204,14 +205,16 @@ static void bfs_delete_inode(struct inode *inode)
info->si_lf_eblk = bi->i_sblock - 1;
mark_buffer_dirty(info->si_sbh);
}
- unlock_kernel();
+ mutex_unlock(&info->bfs_lock);
clear_inode(inode);
}
static void bfs_put_super(struct super_block *s)
{
struct bfs_sb_info *info = BFS_SB(s);
+
brelse(info->si_sbh);
+ mutex_destroy(&info->bfs_lock);
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
@@ -236,11 +239,13 @@ static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
static void bfs_write_super(struct super_block *s)
{
- lock_kernel();
+ struct bfs_sb_info *info = BFS_SB(s);
+
+ mutex_lock(&info->bfs_lock);
if (!(s->s_flags & MS_RDONLY))
- mark_buffer_dirty(BFS_SB(s)->si_sbh);
+ mark_buffer_dirty(info->si_sbh);
s->s_dirt = 0;
- unlock_kernel();
+ mutex_unlock(&info->bfs_lock);
}
static struct kmem_cache *bfs_inode_cachep;
@@ -409,6 +414,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
s->s_dirt = 1;
}
dump_imap("read_super", s);
+ mutex_init(&info->bfs_lock);
return 0;
out:
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