From: Christoph Hellwig <hch@lst.de>
Date: Tue, 25 Sep 2018 13:30:08 -0700
Subject: [PATCH] block: remove ARCH_BIOVEC_PHYS_MERGEABLE
Git-commit: c39ae60dfbda66922f644193b91850abcd4d588c
Patch-mainline: v4.20-rc1
References: bsc#1104967,FATE#325924

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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 arch/arm/include/asm/io.h   | 3 ---
 arch/arm64/include/asm/io.h | 3 ---
 arch/x86/include/asm/io.h   | 3 ---
 block/blk.h                 | 7 ++-----
 drivers/xen/biomerge.c      | 2 +-
 5 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index cf5cd88e7289..6ae7674da0d6 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -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);
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 06119ee511cd..18f6ae6a43f1 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -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 */
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index abdb501a551d..232d8e9ee8a0 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -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
diff --git a/block/blk.h b/block/blk.h
index 50f74ce60453..58c030f727e9 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -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;
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c
index 399c4e30f723..f3fbb700f569 100644
--- a/drivers/xen/biomerge.c
+++ b/drivers/xen/biomerge.c
@@ -1,6 +1,6 @@
 #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,
-- 
2.16.4