ARM: 8396/1: use phys_addr_t in pfn_to_kaddr()
authorVitaly Andrianov <vitalya@ti.com>
Fri, 26 Jun 2015 16:13:03 +0000 (17:13 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 29 Jun 2015 10:16:09 +0000 (11:16 +0100)
This patch fixes pfn_to_kaddr() to use phys_addr_t.  Without this,
this macro is broken on LPAE systems. For physical addresses above
first 4GB result of shifting pfn with PAGE_SHIFT may be truncated.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/include/asm/memory.h

index 184def0..063ef31 100644 (file)
@@ -291,7 +291,7 @@ static inline void *phys_to_virt(phys_addr_t x)
  */
 #define __pa(x)                        __virt_to_phys((unsigned long)(x))
 #define __va(x)                        ((void *)__phys_to_virt((phys_addr_t)(x)))
-#define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
+#define pfn_to_kaddr(pfn)      __va((phys_addr_t)(pfn) << PAGE_SHIFT)
 
 extern phys_addr_t (*arch_virt_to_idmap)(unsigned long x);