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md/raid5: initialize next_checkpoint field before use

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No initial operation was done to this field when we
load/recovery the log, it got assignment only when IO
to raid disk was finished. So r5l_quiesce may use wrong
next_checkpoint to reclaim log space, that would make
reclaimable space calculation confused.

Signed-off-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Zhengyuan Liu 2016-10-24 09:55:20 +08:00 committed by Shaohua Li
parent 579ed34f7b
commit 28cd88e2b4
1 changed files with 3 additions and 0 deletions
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3
drivers/md/raid5-cache.c
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@ -1096,6 +1096,8 @@ static int r5l_recovery_log(struct r5l_log *log)
log->seq = ctx.seq + 11;
log->log_start = r5l_ring_add(log, ctx.pos, BLOCK_SECTORS);
r5l_write_super(log, ctx.pos);
log->last_checkpoint = ctx.pos;
log->next_checkpoint = ctx.pos;
} else {
log->log_start = ctx.pos;
log->seq = ctx.seq;
@ -1168,6 +1170,7 @@ create:
if (log->max_free_space > RECLAIM_MAX_FREE_SPACE)
log->max_free_space = RECLAIM_MAX_FREE_SPACE;
log->last_checkpoint = cp;
log->next_checkpoint = cp;
__free_page(page);