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OpenCloudOS-Kernel
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block: simplify BIOVEC_PHYS_MERGEABLE 

Turn the macro into an inline, move it to blk.h and simplify the
arch hooks a bit.

Also rename the function to biovec_phys_mergeable as there is no need
to shout.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-09-24 09:43:50 +02:00 committed by Jens Axboe
parent 27ca1d4ed0
commit 6a9f5f240a
8 changed files with 28 additions and 30 deletions
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5
arch/arm/include/asm/io.h
View File

@ -469,9 +469,8 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
struct bio_vec;
extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) && \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#ifdef CONFIG_MMU
#define ARCH_HAS_VALID_PHYS_ADDR_RANGE

5
arch/arm64/include/asm/io.h
View File

@ -208,9 +208,8 @@ extern int devmem_is_allowed(unsigned long pfn);
struct bio_vec;
extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) && \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#endif /* __KERNEL__ */
#endif /* __ASM_IO_H */

5
arch/x86/include/asm/io.h
View File

@ -376,9 +376,8 @@ struct bio_vec;
extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) && \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#endif /* CONFIG_XEN */
#define IO_SPACE_LIMIT 0xffff

2
block/bio.c
View File

@ -731,7 +731,7 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page
}
/* If we may be able to merge these biovecs, force a recount */
if (bio->bi_vcnt > 1 && (BIOVEC_PHYS_MERGEABLE(bvec-1, bvec)))
if (bio->bi_vcnt > 1 && biovec_phys_mergeable(bvec-1, bvec))
bio_clear_flag(bio, BIO_SEG_VALID);
done:

4
block/blk-integrity.c
View File

@ -49,7 +49,7 @@ int blk_rq_count_integrity_sg(struct request_queue *q, struct bio *bio)
bio_for_each_integrity_vec(iv, bio, iter) {
if (prev) {
if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
if (!biovec_phys_mergeable(&ivprv, &iv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
@ -95,7 +95,7 @@ int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
bio_for_each_integrity_vec(iv, bio, iter) {
if (prev) {
if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
if (!biovec_phys_mergeable(&ivprv, &iv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))

10
block/blk-merge.c
View File

@ -21,7 +21,7 @@ static inline bool bios_segs_mergeable(struct request_queue *q,
struct bio *prev, struct bio_vec *prev_last_bv,
struct bio_vec *next_first_bv)
{
if (!BIOVEC_PHYS_MERGEABLE(prev_last_bv, next_first_bv))
if (!biovec_phys_mergeable(prev_last_bv, next_first_bv))
return false;
if (!BIOVEC_SEG_BOUNDARY(q, prev_last_bv, next_first_bv))
return false;
@ -199,7 +199,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
if (bvprvp && blk_queue_cluster(q)) {
if (seg_size + bv.bv_len > queue_max_segment_size(q))
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(bvprvp, &bv))
if (!biovec_phys_mergeable(bvprvp, &bv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, bvprvp, &bv))
goto new_segment;
@ -332,7 +332,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
if (seg_size + bv.bv_len
> queue_max_segment_size(q))
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(&bvprv, &bv))
if (!biovec_phys_mergeable(&bvprv, &bv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, &bvprv, &bv))
goto new_segment;
@ -414,7 +414,7 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
bio_get_last_bvec(bio, &end_bv);
bio_get_first_bvec(nxt, &nxt_bv);
if (!BIOVEC_PHYS_MERGEABLE(&end_bv, &nxt_bv))
if (!biovec_phys_mergeable(&end_bv, &nxt_bv))
return 0;
/*
@ -439,7 +439,7 @@ __blk_segment_map_sg(struct request_queue *q, struct bio_vec *bvec,
if ((*sg)->length + nbytes > queue_max_segment_size(q))
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
if (!biovec_phys_mergeable(bvprv, bvec))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
goto new_segment;

14
block/blk.h
View File

@ -149,6 +149,20 @@ static inline void blk_queue_enter_live(struct request_queue *q)
percpu_ref_get(&q->q_usage_counter);
}
#ifndef ARCH_BIOVEC_PHYS_MERGEABLE
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) true
#endif
static inline bool biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2)
{
if (bvec_to_phys(vec1) + vec1->bv_len != bvec_to_phys(vec2))
return false;
if (!ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2))
return false;
return true;
}
static inline bool __bvec_gap_to_prev(struct request_queue *q,
struct bio_vec *bprv, unsigned int offset)
{

13
include/linux/bio.h
View File

@ -140,19 +140,6 @@ static inline bool bio_full(struct bio *bio)
/*
* merge helpers etc
*/
/* Default implementation of BIOVEC_PHYS_MERGEABLE */
#define __BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
/*
* allow arch override, for eg virtualized architectures (put in asm/io.h)
*/
#ifndef BIOVEC_PHYS_MERGEABLE
#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
__BIOVEC_PHYS_MERGEABLE(vec1, vec2)
#endif
#define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \
(((addr1) | (mask)) == (((addr2) - 1) | (mask)))
#define BIOVEC_SEG_BOUNDARY(q, b1, b2) \