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iommufd: pfn_reader local variables

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Add local variables for common sub-expressions needed by a subsequent
patch.  No functional change.

Link: https://patch.msgid.link/r/1729861919-234514-5-git-send-email-steven.sistare@oracle.com
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Steve Sistare
2024-10-25 06:11:54 -07:00
committed by Jason Gunthorpe
parent 99ff06dcca
commit c27f0a606c
1 changed files with 14 additions and 11 deletions
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25
drivers/iommu/iommufd/pages.c
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@@ -978,6 +978,8 @@ static int pfn_reader_fill_span(struct pfn_reader *pfns)
{
struct interval_tree_double_span_iter *span = &pfns->span;
unsigned long start_index = pfns->batch_end_index;
struct pfn_reader_user *user = &pfns->user;
unsigned long npages;
struct iopt_area *area;
int rc;
@@ -1015,10 +1017,9 @@ static int pfn_reader_fill_span(struct pfn_reader *pfns)
return rc;
}
batch_from_pages(&pfns->batch,
pfns->user.upages +
(start_index - pfns->user.upages_start),
pfns->user.upages_end - start_index);
npages = user->upages_end - start_index;
start_index -= user->upages_start;
batch_from_pages(&pfns->batch, user->upages + start_index, npages);
return 0;
}
@@ -1092,16 +1093,18 @@ static int pfn_reader_init(struct pfn_reader *pfns, struct iopt_pages *pages,
static void pfn_reader_release_pins(struct pfn_reader *pfns)
{
struct iopt_pages *pages = pfns->pages;
struct pfn_reader_user *user = &pfns->user;
if (pfns->user.upages_end > pfns->batch_end_index) {
size_t npages = pfns->user.upages_end - pfns->batch_end_index;
if (user->upages_end > pfns->batch_end_index) {
/* Any pages not transferred to the batch are just unpinned */
unpin_user_pages(pfns->user.upages + (pfns->batch_end_index -
pfns->user.upages_start),
npages);
unsigned long npages = user->upages_end - pfns->batch_end_index;
unsigned long start_index = pfns->batch_end_index -
user->upages_start;
unpin_user_pages(user->upages + start_index, npages);
iopt_pages_sub_npinned(pages, npages);
pfns->user.upages_end = pfns->batch_end_index;
user->upages_end = pfns->batch_end_index;
}
if (pfns->batch_start_index != pfns->batch_end_index) {
pfn_reader_unpin(pfns);