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authorKemeng Shi <shikemeng@huaweicloud.com>2023-03-11 20:09:49 +0300
committerTheodore Ts'o <tytso@mit.edu>2023-04-06 08:13:12 +0300
commit91a48aaf59d0da6b93e49de87420c30aba0acaa8 (patch)
treeec77a9fd0363f442385976a0496e20435dd43bad /fs/ext4/mballoc.c
parent1221b235019f9e3bbc38cfc53f7c03456bee53b4 (diff)
downloadlinux-91a48aaf59d0da6b93e49de87420c30aba0acaa8.tar.xz
ext4: avoid unnecessary pointer dereference in ext4_mb_normalize_request
Result of EXT4_SB(ac->ac_sb) is already stored in sbi at beginning of ext4_mb_normalize_request. Use sbi instead of EXT4_SB(ac->ac_sb) to remove unnecessary pointer dereference. Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Link: https://lore.kernel.org/r/20230311170949.1047958-3-shikemeng@huaweicloud.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 0b03a3b90207..05a1f19c925b 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4049,7 +4049,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
size = 8 * 1024 * 1024;
} else {
start_off = (loff_t) ac->ac_o_ex.fe_logical << bsbits;
- size = (loff_t) EXT4_C2B(EXT4_SB(ac->ac_sb),
+ size = (loff_t) EXT4_C2B(sbi,
ac->ac_o_ex.fe_len) << bsbits;
}
size = size >> bsbits;
@@ -4094,8 +4094,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
continue;
}
- pa_end = pa->pa_lstart + EXT4_C2B(EXT4_SB(ac->ac_sb),
- pa->pa_len);
+ pa_end = pa->pa_lstart + EXT4_C2B(sbi, pa->pa_len);
/* PA must not overlap original request */
BUG_ON(!(ac->ac_o_ex.fe_logical >= pa_end ||
@@ -4128,8 +4127,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
spin_lock(&pa->pa_lock);
if (pa->pa_deleted == 0) {
- pa_end = pa->pa_lstart + EXT4_C2B(EXT4_SB(ac->ac_sb),
- pa->pa_len);
+ pa_end = pa->pa_lstart + EXT4_C2B(sbi, pa->pa_len);
BUG_ON(!(start >= pa_end || end <= pa->pa_lstart));
}
spin_unlock(&pa->pa_lock);