This is a note to let you know that I've just added the patch titled
ext4: simplify calculation of blkoff in ext4_mb_new_blocks_simple
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext4-simplify-calculation-of-blkoff-in-ext4_mb_new_b.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fd649a9960459ece5e516030dce6809b20ffdb25
Author: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Date: Sat Mar 4 01:21:20 2023 +0800
ext4: simplify calculation of blkoff in ext4_mb_new_blocks_simple
[ Upstream commit 253cacb0de89235673ad5889d61f275a73dbee79 ]
We try to allocate a block from goal in ext4_mb_new_blocks_simple. We
only need get blkoff in first group with goal and set blkoff to 0 for
the rest groups.
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230303172120.3800725-21-shikemeng@xxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Stable-dep-of: 3f4830abd236 ("ext4: fix potential unnitialized variable")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8dba416aa6c1e..c2fcdee223317 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -5908,9 +5908,6 @@ static ext4_fsblk_t ext4_mb_new_blocks_simple(handle_t *handle,
return 0;
}
- ext4_get_group_no_and_offset(sb,
- max(ext4_group_first_block_no(sb, group), goal),
- NULL, &blkoff);
while (1) {
i = mb_find_next_zero_bit(bitmap_bh->b_data, max,
blkoff);
@@ -5925,6 +5922,8 @@ static ext4_fsblk_t ext4_mb_new_blocks_simple(handle_t *handle,
brelse(bitmap_bh);
if (i < max)
break;
+
+ blkoff = 0;
}
if (group >= ext4_get_groups_count(sb) || i >= max) {
