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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 <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-09-25 13:30:08 -07:00 committed by Jens Axboe
parent 20e3267601
commit c39ae60dfb
5 changed files with 3 additions and 15 deletions
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3
arch/arm/include/asm/io.h
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@ -459,9 +459,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#include <asm-generic/io.h>
#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
extern int valid_phys_addr_range(phys_addr_t addr, size_t size);

3
arch/arm64/include/asm/io.h
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@ -205,8 +205,5 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
extern int devmem_is_allowed(unsigned long pfn);
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#endif /* __KERNEL__ */
#endif /* __ASM_IO_H */

3
arch/x86/include/asm/io.h
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@ -371,9 +371,6 @@ extern bool is_early_ioremap_ptep(pte_t *ptep);
#ifdef CONFIG_XEN
#include <xen/xen.h>
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#endif /* CONFIG_XEN */
#define IO_SPACE_LIMIT 0xffff

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;

2
drivers/xen/biomerge.c
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@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bio.h>
#include <linux/io.h>
#include <linux/export.h>
#include <xen/xen.h>
#include <xen/page.h>
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,