mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 06:01:57 +00:00
0383ad4374
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>
24 lines
617 B
C
24 lines
617 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/bio.h>
|
|
#include <linux/export.h>
|
|
#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 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(page));
|
|
|
|
return bfn1 + PFN_DOWN(vec1->bv_offset + vec1->bv_len) == bfn2;
|
|
#else
|
|
/*
|
|
* XXX: Add support for merging bio_vec when using different page
|
|
* size in Xen and Linux.
|
|
*/
|
|
return false;
|
|
#endif
|
|
}
|