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ext4: do not reference pa_inode from group_pa 

pa_inode in group_pa is set NULL in ext4_mb_new_group_pa, so
pa_inode should be not referenced.

Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Yongqiang Yang 2011-12-18 15:49:54 -05:00 committed by Theodore Ts'o
parent 384703b8e6
commit 60e07cf515
2 changed files with 4 additions and 4 deletions
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2
fs/ext4/mballoc.c
View File

@ -3671,7 +3671,7 @@ ext4_mb_release_group_pa(struct ext4_buddy *e4b,
ext4_group_t group;
ext4_grpblk_t bit;
trace_ext4_mb_release_group_pa(pa);
trace_ext4_mb_release_group_pa(sb, pa);
BUG_ON(pa->pa_deleted == 0);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
BUG_ON(group != e4b->bd_group && pa->pa_len != 0);

6
include/trace/events/ext4.h
View File

@ -573,9 +573,9 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
);
TRACE_EVENT(ext4_mb_release_group_pa,
TP_PROTO(struct ext4_prealloc_space *pa),
TP_PROTO(struct super_block *sb, struct ext4_prealloc_space *pa),
TP_ARGS(pa),
TP_ARGS(sb, pa),
TP_STRUCT__entry(
__field( dev_t, dev )
@ -585,7 +585,7 @@ TRACE_EVENT(ext4_mb_release_group_pa,
),
TP_fast_assign(
__entry->dev = pa->pa_inode->i_sb->s_dev;
__entry->dev = sb->s_dev;
__entry->pa_pstart = pa->pa_pstart;
__entry->pa_len = pa->pa_len;
),