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md/bitmap: remove bitmap_mask_state 

This function isn't really needed.  It sets or clears a flag in both
bitmap->flags and sb->state.
However both times it is called, bitmap_update_sb is called soon
afterwards which copies bitmap->flags to sb->state.
So just make changes to bitmap->flags, and open-code those rather than
hiding in a function.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-05-22 13:55:13 +10:00
parent bc9891a885
commit edbb79df67
1 changed files with 3 additions and 34 deletions
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37
drivers/md/bitmap.c
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@ -640,38 +640,6 @@ out_no_sb:
return err;
}
enum bitmap_mask_op {
MASK_SET,
MASK_UNSET
};
/* record the state of the bitmap in the superblock. Return the old value */
static int bitmap_mask_state(struct bitmap *bitmap, enum bitmap_state bits,
enum bitmap_mask_op op)
{
bitmap_super_t *sb;
int old;
if (!bitmap->storage.sb_page) /* can't set the state */
return 0;
sb = kmap_atomic(bitmap->storage.sb_page);
old = le32_to_cpu(sb->state) & bits;
switch (op) {
case MASK_SET:
sb->state |= cpu_to_le32(bits);
bitmap->flags |= bits;
break;
case MASK_UNSET:
sb->state &= cpu_to_le32(~bits);
bitmap->flags &= ~bits;
break;
default:
BUG();
}
kunmap_atomic(sb);
return old;
}
/*
* general bitmap file operations
*/
@ -828,7 +796,8 @@ static void bitmap_file_kick(struct bitmap *bitmap)
{
char *path, *ptr = NULL;
if (bitmap_mask_state(bitmap, BITMAP_STALE, MASK_SET) == 0) {
if (!(bitmap->flags & BITMAP_STALE)) {
bitmap->flags |= BITMAP_STALE;
bitmap_update_sb(bitmap);
if (bitmap->storage.file) {
@ -1830,7 +1799,7 @@ int bitmap_load(struct mddev *mddev)
if (err)
goto out;
bitmap_mask_state(bitmap, BITMAP_STALE, MASK_UNSET);
bitmap->flags &= ~BITMAP_STALE;
/* Kick recovery in case any bits were set */
set_bit(MD_RECOVERY_NEEDED, &bitmap->mddev->recovery);