linux-kernel - [POC][PATCH 66/83] switch xen_get_swiotlb_free

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Date:	Mon, 21 Dec 2015 23:47:39 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	linux-kernel@...r.kernel.org
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [POC][PATCH 66/83] switch xen_get_swiotlb_free_pages() to returning a pointer

From: Al Viro <viro@...iv.linux.org.uk>

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 arch/arm/include/asm/xen/page.h | 2 +-
 arch/arm/xen/mm.c               | 4 ++--
 arch/x86/include/asm/xen/page.h | 4 ++--
 drivers/xen/swiotlb-xen.c       | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index 415dbc6..79f92d4 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -117,6 +117,6 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
 bool xen_arch_need_swiotlb(struct device *dev,
 			   phys_addr_t phys,
 			   dma_addr_t dev_addr);
-unsigned long xen_get_swiotlb_free_pages(unsigned int order);
+void *xen_get_swiotlb_free_pages(unsigned int order);
 
 #endif /* _ASM_ARM_XEN_PAGE_H */
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index c5f9a9e..9677c56 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -22,7 +22,7 @@
 #include <asm/xen/hypercall.h>
 #include <asm/xen/interface.h>
 
-unsigned long xen_get_swiotlb_free_pages(unsigned int order)
+void *xen_get_swiotlb_free_pages(unsigned int order)
 {
 	struct memblock_region *reg;
 	gfp_t flags = __GFP_NOWARN|__GFP_KSWAPD_RECLAIM;
@@ -33,7 +33,7 @@ unsigned long xen_get_swiotlb_free_pages(unsigned int order)
 			break;
 		}
 	}
-	return __get_free_pages(flags, order);
+	return get_free_pages(flags, order);
 }
 
 enum dma_cache_op {
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index f5fb840..89d7a44 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -304,9 +304,9 @@ static inline bool xen_arch_need_swiotlb(struct device *dev,
 	return false;
 }
 
-static inline unsigned long xen_get_swiotlb_free_pages(unsigned int order)
+static inline void *xen_get_swiotlb_free_pages(unsigned int order)
 {
-	return __get_free_pages(__GFP_NOWARN, order);
+	return get_free_pages(__GFP_NOWARN, order);
 }
 
 #endif /* _ASM_X86_XEN_PAGE_H */
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index fa6b56e..952255f 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -234,7 +234,7 @@ retry:
 #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
 #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
 		while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
-			xen_io_tlb_start = (void *)xen_get_swiotlb_free_pages(order);
+			xen_io_tlb_start = xen_get_swiotlb_free_pages(order);
 			if (xen_io_tlb_start)
 				break;
 			order--;
-- 
2.1.4

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