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mark_files_ro(): don't bother with mntget/mntput 

mnt_drop_write_file() is safe under any lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-23 22:41:54 +04:00
parent c4107b3097
commit 85d7d618c1
1 changed files with 1 additions and 8 deletions
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9
fs/file_table.c
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@ -483,10 +483,8 @@ void mark_files_ro(struct super_block *sb)
{
struct file *f;
retry:
lg_global_lock(&files_lglock);
do_file_list_for_each_entry(sb, f) {
struct vfsmount *mnt;
if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
continue;
if (!file_count(f))
@ -499,12 +497,7 @@ retry:
if (file_check_writeable(f) != 0)
continue;
file_release_write(f);
mnt = mntget(f->f_path.mnt);
/* This can sleep, so we can't hold the spinlock. */
lg_global_unlock(&files_lglock);
mnt_drop_write(mnt);
mntput(mnt);
goto retry;
mnt_drop_write_file(f);
} while_file_list_for_each_entry;
lg_global_unlock(&files_lglock);
}