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exofs: remove BKL from super operations 

the two places inside exofs that where taking the BKL were:
exofs_put_super() - .put_super
and
exofs_sync_fs() - which is .sync_fs and is also called from
                  .write_super.

Now exofs_sync_fs() is protected from itself by also taking
the sb_lock.

exofs_put_super() directly calls exofs_sync_fs() so there is no
danger between these two either.

In anyway there is absolutely nothing dangerous been done
inside exofs_sync_fs().

Unless there is some subtle race with the actual lifetime of
the super_block in regard to .put_super and some other parts
of the VFS. Which is highly unlikely.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Boaz Harrosh 2009-08-19 17:56:46 +03:00 committed by Al Viro
parent 88a0a53d70
commit 1ba50bbe93
1 changed files with 0 additions and 6 deletions
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6
fs/exofs/super.c
View File

@ -214,7 +214,6 @@ int exofs_sync_fs(struct super_block *sb, int wait)
}
lock_super(sb);
lock_kernel();
sbi = sb->s_fs_info;
fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
fscb->s_numfiles = cpu_to_le32(sbi->s_numfiles);
@ -245,7 +244,6 @@ int exofs_sync_fs(struct super_block *sb, int wait)
out:
if (or)
osd_end_request(or);
unlock_kernel();
unlock_super(sb);
kfree(fscb);
return ret;
@ -268,8 +266,6 @@ static void exofs_put_super(struct super_block *sb)
int num_pend;
struct exofs_sb_info *sbi = sb->s_fs_info;
lock_kernel();
if (sb->s_dirt)
exofs_write_super(sb);
@ -286,8 +282,6 @@ static void exofs_put_super(struct super_block *sb)
osduld_put_device(sbi->s_dev);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
unlock_kernel();
}
/*