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authorLukas Czerner <lczerner@redhat.com>2013-04-04 07:32:34 +0400
committerTheodore Ts'o <tytso@mit.edu>2013-04-04 07:32:34 +0400
commitbd86298e60b84b5e6d2da3e75c4ce2f6b70bdeed (patch)
tree8da632bbc3acfcc7e7416da820de87d56f2168a4 /fs/ext4/mballoc.c
parent689110098c7df10fab8800d3bf8e727c21f426fb (diff)
downloadlinux-bd86298e60b84b5e6d2da3e75c4ce2f6b70bdeed.tar.xz
ext4: introduce ext4_get_group_number()
Currently on many places in ext4 we're using ext4_get_group_no_and_offset() even though we're only interested in knowing the block group of the particular block, not the offset within the block group so we can use more efficient way to compute block group. This patch introduces ext4_get_group_number() which computes block group for a given block much more efficiently. Use this function instead of ext4_get_group_no_and_offset() everywhere where we're only interested in knowing the block group. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 580aada3d1bb..8c8d05218021 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3344,7 +3344,7 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
if (pa->pa_type == MB_GROUP_PA)
grp_blk--;
- ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL);
+ grp = ext4_get_group_number(sb, grp_blk);
/*
* possible race:
@@ -3809,7 +3809,7 @@ repeat:
list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {
BUG_ON(pa->pa_type != MB_INODE_PA);
- ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL);
+ group = ext4_get_group_number(sb, pa->pa_pstart);
err = ext4_mb_load_buddy(sb, group, &e4b);
if (err) {
@@ -4071,7 +4071,7 @@ ext4_mb_discard_lg_preallocations(struct super_block *sb,
list_for_each_entry_safe(pa, tmp, &discard_list, u.pa_tmp_list) {
- ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL);
+ group = ext4_get_group_number(sb, pa->pa_pstart);
if (ext4_mb_load_buddy(sb, group, &e4b)) {
ext4_error(sb, "Error loading buddy information for %u",
group);