[RFC 03/11] ext4: mballoc: Fix getting the right group desc in ext4_mb_prefetch_fini
From: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Date: 2023-01-27 12:38:11
Also in:
linux-fsdevel, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
group descriptor and group info are not of the same group in ext4_mb_prefetch_fini(). This problem was found during code review/walkthrough and seems like a bug, so fix it. Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com> --- fs/ext4/mballoc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 572e79a698d4..8b22cc07b054 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c@@ -2569,14 +2569,14 @@ ext4_group_t ext4_mb_prefetch(struct super_block *sb, ext4_group_t group, void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group, unsigned int nr) { - while (nr-- > 0) { - struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, - NULL); - struct ext4_group_info *grp = ext4_get_group_info(sb, group); + struct ext4_group_desc *gdp; + struct ext4_group_info *grp; + while (nr-- > 0) { if (!group) group = ext4_get_groups_count(sb); group--; + gdp = ext4_get_group_desc(sb, group, NULL); grp = ext4_get_group_info(sb, group); if (EXT4_MB_GRP_NEED_INIT(grp) &&
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2.31.1