dm kcopyd: remove nr_pages field from job structure

The nr_pages field in struct kcopyd_job is only used temporarily in
run_pages_job() to count the number of required pages.
We can use a local variable instead.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index e7926fa1eef2..98725e119324 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -224,7 +224,6 @@ struct kcopyd_job {
         unsigned int num_dests;
         struct dm_io_region dests[DM_KCOPYD_MAX_REGIONS];
 
-        unsigned int nr_pages;
         struct page_list *pages;
 
         /*
@@ -396,9 +395,9 @@ static int run_io_job(struct kcopyd_job *job)
 static int run_pages_job(struct kcopyd_job *job)
 {
         int r;
+        unsigned nr_pages = dm_div_up(job->dests[0].count, PAGE_SIZE >> 9);
 
-        job->nr_pages = dm_div_up(job->dests[0].count, PAGE_SIZE >> 9);
-        r = kcopyd_get_pages(job->kc, job->nr_pages, &job->pages);
+        r = kcopyd_get_pages(job->kc, nr_pages, &job->pages);
         if (!r) {
                 /* this job is ready for io */
                 push(&job->kc->io_jobs, job);
@@ -600,7 +599,6 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
         job->num_dests = num_dests;
         memcpy(&job->dests, dests, sizeof(*dests) * num_dests);
 
-        job->nr_pages = 0;
         job->pages = NULL;
 
         job->fn = fn;