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-rw-r--r--block/bio.c9
-rw-r--r--include/linux/bvec.h13
2 files changed, 11 insertions, 11 deletions
diff --git a/block/bio.c b/block/bio.c
index d3490aeb1a7e..8adc2a20d57d 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -659,8 +659,13 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
return false;
if (xen_domain() && !xen_biovec_phys_mergeable(bv, page))
return false;
- if (same_page && (vec_end_addr & PAGE_MASK) != page_addr)
- return false;
+
+ if ((vec_end_addr & PAGE_MASK) != page_addr) {
+ if (same_page)
+ return false;
+ if (pfn_to_page(PFN_DOWN(vec_end_addr)) + 1 != page)
+ return false;
+ }
return true;
}
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 307bbda62b7b..44b0f4684190 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -51,11 +51,6 @@ struct bvec_iter_all {
unsigned done;
};
-static inline struct page *bvec_nth_page(struct page *page, int idx)
-{
- return idx == 0 ? page : nth_page(page, idx);
-}
-
/*
* various member access, note that bio_data should of course not be used
* on highmem page vectors
@@ -92,8 +87,8 @@ static inline struct page *bvec_nth_page(struct page *page, int idx)
PAGE_SIZE - bvec_iter_offset((bvec), (iter)))
#define bvec_iter_page(bvec, iter) \
- bvec_nth_page(mp_bvec_iter_page((bvec), (iter)), \
- mp_bvec_iter_page_idx((bvec), (iter)))
+ (mp_bvec_iter_page((bvec), (iter)) + \
+ mp_bvec_iter_page_idx((bvec), (iter)))
#define bvec_iter_bvec(bvec, iter) \
((struct bio_vec) { \
@@ -157,7 +152,7 @@ static inline void mp_bvec_next_segment(const struct bio_vec *bvec,
struct bio_vec *bv = &iter_all->bv;
if (bv->bv_page) {
- bv->bv_page = nth_page(bv->bv_page, 1);
+ bv->bv_page++;
bv->bv_offset = 0;
} else {
bv->bv_page = bvec->bv_page;
@@ -177,7 +172,7 @@ static inline void mp_bvec_last_segment(const struct bio_vec *bvec,
unsigned total = bvec->bv_offset + bvec->bv_len;
unsigned last_page = (total - 1) / PAGE_SIZE;
- seg->bv_page = bvec_nth_page(bvec->bv_page, last_page);
+ seg->bv_page = bvec->bv_page + last_page;
/* the whole segment is inside the last page */
if (bvec->bv_offset >= last_page * PAGE_SIZE) {