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reiserfs: Fix remaining in-reclaim-fs <-> reclaim-fs-on locking inversion 

Commit 500f5a0bf5
(reiserfs: Fix possible recursive lock) fixed a vmalloc under reiserfs
lock that triggered a lockdep warning because of a
IN-FS-RECLAIM <-> RECLAIM-FS-ON locking dependency inversion.

But this patch has ommitted another vmalloc call in the same path
that allocates the journal. Relax the lock for this one too.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2009-12-29 21:51:15 +01:00
parent 47376ceba5
commit 98ea3f50bc
1 changed files with 12 additions and 3 deletions
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15
fs/reiserfs/journal.c
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@ -2758,11 +2758,18 @@ int journal_init(struct super_block *sb, const char *j_dev_name,
struct reiserfs_journal *journal;
struct reiserfs_journal_list *jl;
char b[BDEVNAME_SIZE];
int ret;
/*
* Unlock here to avoid various RECLAIM-FS-ON <-> IN-RECLAIM-FS
* dependency inversion warnings.
*/
reiserfs_write_unlock(sb);
journal = SB_JOURNAL(sb) = vmalloc(sizeof(struct reiserfs_journal));
if (!journal) {
reiserfs_warning(sb, "journal-1256",
"unable to get memory for journal structure");
reiserfs_write_lock(sb);
return 1;
}
memset(journal, 0, sizeof(struct reiserfs_journal));
@ -2771,10 +2778,12 @@ int journal_init(struct super_block *sb, const char *j_dev_name,
INIT_LIST_HEAD(&journal->j_working_list);
INIT_LIST_HEAD(&journal->j_journal_list);
journal->j_persistent_trans = 0;
if (reiserfs_allocate_list_bitmaps(sb,
journal->j_list_bitmap,
reiserfs_bmap_count(sb)))
ret = reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap,
reiserfs_bmap_count(sb));
reiserfs_write_lock(sb);
if (ret)
goto free_and_return;
allocate_bitmap_nodes(sb);
/* reserved for journal area support */