linux-kernel - [PATCH v4 4/8] [IA64] Change xlate_dev_{kmem,mem}

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Date:	Wed, 13 Aug 2014 12:28:54 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Sam Ravnborg <sam@...nborg.org>,
	linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
	linux-s390@...r.kernel.org, sparclinux@...r.kernel.org,
	x86@...nel.org, linux-serial@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 4/8] [IA64] Change xlate_dev_{kmem,mem}_ptr() prototypes

From: Thierry Reding <treding@...dia.com>

xlate_dev_mem_ptr() is used to convert a physical address to an uncached
kernel virtual address mapping, so make it use phys_addr_t as type for
the physical address and return void * for the kernel virtual address.

xlate_dev_kmem_ptr() converts a cached kernel virtual address mapping to
an uncached kernel virtual address mapping, so make it use void * for
both the input parameter and return value.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
Changes in v4:
- new patch

 arch/ia64/include/asm/uaccess.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/ia64/include/asm/uaccess.h b/arch/ia64/include/asm/uaccess.h
index 449c8c0fa2bd..103bedc59644 100644
--- a/arch/ia64/include/asm/uaccess.h
+++ b/arch/ia64/include/asm/uaccess.h
@@ -365,15 +365,15 @@ ia64_done_with_exception (struct pt_regs *regs)
 }
 
 #define ARCH_HAS_TRANSLATE_MEM_PTR	1
-static __inline__ char *
-xlate_dev_mem_ptr (unsigned long p)
+static __inline__ void *
+xlate_dev_mem_ptr(phys_addr_t p)
 {
 	struct page *page;
-	char * ptr;
+	void *ptr;
 
 	page = pfn_to_page(p >> PAGE_SHIFT);
 	if (PageUncached(page))
-		ptr = (char *)p + __IA64_UNCACHED_OFFSET;
+		ptr = (void *)p + __IA64_UNCACHED_OFFSET;
 	else
 		ptr = __va(p);
 
@@ -383,15 +383,15 @@ xlate_dev_mem_ptr (unsigned long p)
 /*
  * Convert a virtual cached kernel memory pointer to an uncached pointer
  */
-static __inline__ char *
-xlate_dev_kmem_ptr (char * p)
+static __inline__ void *
+xlate_dev_kmem_ptr(void *p)
 {
 	struct page *page;
-	char * ptr;
+	void *ptr;
 
 	page = virt_to_page((unsigned long)p);
 	if (PageUncached(page))
-		ptr = (char *)__pa(p) + __IA64_UNCACHED_OFFSET;
+		ptr = (void *)__pa(p) + __IA64_UNCACHED_OFFSET;
 	else
 		ptr = p;
 
-- 
2.0.4

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