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block: pass page to xen_biovec_phys_mergeable 

xen_biovec_phys_mergeable() only needs .bv_page of the 2nd bio bvec
for checking if the two bvecs can be merged, so pass page to
xen_biovec_phys_mergeable() directly.

No function change.

Cc: ris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: xen-devel@lists.xenproject.org
Cc: Omar Sandoval <osandov@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.2
Ming Lei 2019-03-29 15:07:54 +08:00 committed by Jens Axboe
parent 56a85fd837
commit 0383ad4374
3 changed files with 7 additions and 4 deletions
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2
block/blk.h
View File

@ -75,7 +75,7 @@ static inline bool biovec_phys_mergeable(struct request_queue *q,
if (addr1 + vec1->bv_len != addr2)
return false;
if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2))
if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page))
return false;
if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask))
return false;

5
drivers/xen/biomerge.c
View File

@ -4,12 +4,13 @@
#include <xen/xen.h>
#include <xen/page.h>
/* check if @page can be merged with 'vec1' */
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2)
const struct page *page)
{
#if XEN_PAGE_SIZE == PAGE_SIZE
unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page));
unsigned long bfn2 = pfn_to_bfn(page_to_pfn(vec2->bv_page));
unsigned long bfn2 = pfn_to_bfn(page_to_pfn(page));
return bfn1 + PFN_DOWN(vec1->bv_offset + vec1->bv_len) == bfn2;
#else

4
include/xen/xen.h
View File

@ -43,8 +43,10 @@ extern struct hvm_start_info pvh_start_info;
#endif /* CONFIG_XEN_DOM0 */
struct bio_vec;
struct page;
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
const struct page *page);
#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
extern u64 xen_saved_max_mem_size;