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authorMing Lei <ming.lei@redhat.com>2019-03-29 15:07:54 +0800
committerJens Axboe <axboe@kernel.dk>2019-04-01 12:11:13 -0600
commit0383ad4374f7ad7edd925a2ee4753035c3f5508a (patch)
tree9c79f466839188b74a3a69e2c3f87b806800188d
parent56a85fd8376ef32458efb6ea97a820754e12f6bb (diff)
downloadlinux-0383ad4374f7ad7edd925a2ee4753035c3f5508a.tar.bz2
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>
-rw-r--r--block/blk.h2
-rw-r--r--drivers/xen/biomerge.c5
-rw-r--r--include/xen/xen.h4
3 files changed, 7 insertions, 4 deletions
diff --git a/block/blk.h b/block/blk.h
index 5d636ee41663..e27fd1512e4b 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -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;
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c
index f3fbb700f569..05a286d24f14 100644
--- a/drivers/xen/biomerge.c
+++ b/drivers/xen/biomerge.c
@@ -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
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 19d032373de5..19a72f591e2b 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -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;