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new helper: iterate_supers()

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... and switch the simple "loop over superblocks and do something"
loops to it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-03-23 06:06:58 -04:00
parent 35cf7ba0b4
commit 01a05b337a
6 changed files with 57 additions and 83 deletions
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26
fs/buffer.c
View file

@ -560,25 +560,17 @@ repeat:
return err;
}
static void do_thaw_one(struct super_block *sb, void *unused)
{
char b[BDEVNAME_SIZE];
while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
printk(KERN_WARNING "Emergency Thaw on %s\n",
bdevname(sb->s_bdev, b));
}
static void do_thaw_all(struct work_struct *work)
{
struct super_block *sb, *n;
char b[BDEVNAME_SIZE];
spin_lock(&sb_lock);
list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
if (list_empty(&sb->s_instances))
continue;
sb->s_count++;
spin_unlock(&sb_lock);
down_read(&sb->s_umount);
while (sb->s_bdev && !thaw_bdev(sb->s_bdev, sb))
printk(KERN_WARNING "Emergency Thaw on %s\n",
bdevname(sb->s_bdev, b));
up_read(&sb->s_umount);
spin_lock(&sb_lock);
}
spin_unlock(&sb_lock);
iterate_supers(do_thaw_one, NULL);
kfree(work);
printk(KERN_WARNING "Emergency Thaw complete\n");
}