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block: remove ARCH_BIOVEC_PHYS_MERGEABLE

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Take the Xen check into the core code instead of delegating it to
the architectures.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2018-09-25 13:30:08 -07:00 • committed by Jens Axboe
commit c39ae60dfb
5 changed files with 3 additions and 15 deletions
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7
block/blk.h
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@ -4,6 +4,7 @@
#include <linux/idr.h>
#include <linux/blk-mq.h>
#include <xen/xen.h>
#include "blk-mq.h"
/* Amount of time in which a process may batch requests */
@ -149,10 +150,6 @@ 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(struct request_queue *q,
struct bio_vec *vec1, struct bio_vec *vec2)
{
@ -162,7 +159,7 @@ static inline bool biovec_phys_mergeable(struct request_queue *q,
if (addr1 + vec1->bv_len != addr2)
return false;
if (!ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2))
if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2))
return false;
if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask))
return false;