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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>
This commit is contained in:
Mikulas Patocka 2011-08-02 12:32:02 +01:00 committed by Alasdair G Kergon
parent 4622afb3f5
commit 5bf45a3dcd
1 changed files with 2 additions and 4 deletions
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6
drivers/md/dm-kcopyd.c
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@ -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;