From: Mikulas Patocka Date: Wed, 8 Apr 2009 23:27:16 +0000 (+0100) Subject: dm kcopyd: prepare for callback race fix X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=73830857bca6f6c9dbd48e906daea50bea42d676;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dm kcopyd: prepare for callback race fix Use a variable in segment_complete() to point to the dm_kcopyd_client struct and only release job->pages in run_complete_job() if any are defined. These changes are needed by the next patch. Cc: stable@kernel.org Signed-off-by: Mikulas Patocka Signed-off-by: Alasdair G Kergon --- diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index 0a225da21272..9d379070918b 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -297,7 +297,8 @@ static int run_complete_job(struct kcopyd_job *job) dm_kcopyd_notify_fn fn = job->fn; struct dm_kcopyd_client *kc = job->kc; - kcopyd_put_pages(kc, job->pages); + if (job->pages) + kcopyd_put_pages(kc, job->pages); mempool_free(job, kc->job_pool); fn(read_err, write_err, context); @@ -461,6 +462,7 @@ static void segment_complete(int read_err, unsigned long write_err, sector_t progress = 0; sector_t count = 0; struct kcopyd_job *job = (struct kcopyd_job *) context; + struct dm_kcopyd_client *kc = job->kc; mutex_lock(&job->lock); @@ -490,7 +492,7 @@ static void segment_complete(int read_err, unsigned long write_err, if (count) { int i; - struct kcopyd_job *sub_job = mempool_alloc(job->kc->job_pool, + struct kcopyd_job *sub_job = mempool_alloc(kc->job_pool, GFP_NOIO); *sub_job = *job;