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authorVineet Gupta <vgupta@synopsys.com>2015-12-18 13:57:41 +0530
committerVineet Gupta <vgupta@synopsys.com>2016-03-12 11:59:47 +0530
commitc2ff5cf2735c57542b8e630e63d6983013a2e1c3 (patch)
treefee4aa6cca0d1e6a7b62063bef6a4f875a97dc92 /arch/arc
parent0b291635fce2bda983e1d2865a8bb5f46a8382bf (diff)
ARC: mm: Use virt_to_pfn() for addr >> PAGE_SHIFT pattern
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/include/asm/page.h19
-rw-r--r--arch/arc/include/asm/pgtable.h9
2 files changed, 11 insertions, 17 deletions
diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h
index 429957f1c236..9a7cf521b95c 100644
--- a/arch/arc/include/asm/page.h
+++ b/arch/arc/include/asm/page.h
@@ -10,7 +10,6 @@
#include <uapi/asm/page.h>
-
#ifndef __ASSEMBLY__
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
@@ -76,30 +75,26 @@ typedef unsigned long pgprot_t;
typedef pte_t * pgtable_t;
-#define ARCH_PFN_OFFSET (CONFIG_LINUX_LINK_BASE >> PAGE_SHIFT)
+#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
+
+#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE)
-#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
+#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
/*
* __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
*
* These macros have historically been misnamed
* virt here means link-address/program-address as embedded in object code.
- * So if kernel img is linked at 0x8000_0000 onwards, 0x8010_0000 will be
- * 128th page, and virt_to_page( ) will return the struct page corresp to it.
- * mem_map[ ] is an array of struct page for each page frame in the system
- *
- * Independent of where linux is linked at, link-addr = physical address
- * So the old macro __pa = vaddr + PAGE_OFFSET - CONFIG_LINUX_LINK_BASE
- * would have been wrong in case kernel is not at 0x8zs
+ * And for ARC, link-addr = physical address
*/
#define __pa(vaddr) ((unsigned long)vaddr)
#define __va(paddr) ((void *)((unsigned long)(paddr)))
#define virt_to_page(kaddr) \
- (mem_map + ((__pa(kaddr) - CONFIG_LINUX_LINK_BASE) >> PAGE_SHIFT))
+ (mem_map + virt_to_pfn((kaddr) - CONFIG_LINUX_LINK_BASE))
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
/* Default Permissions for stack/heaps pages (Non Executable) */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE)
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index ec2af62f5348..7d6c93e63adf 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -278,15 +278,14 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
#define pmd_present(x) (pmd_val(x))
#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
-#define pte_page(x) (mem_map + \
- (unsigned long)(((pte_val(x) - CONFIG_LINUX_LINK_BASE) >> \
- PAGE_SHIFT)))
+#define pte_page(pte) \
+ (mem_map + virt_to_pfn(pte_val(pte) - CONFIG_LINUX_LINK_BASE))
#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
-#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
+#define pte_pfn(pte) virt_to_pfn(pte_val(pte))
#define pfn_pte(pfn, prot) (__pte(((pte_t)(pfn) << PAGE_SHIFT) | \
pgprot_val(prot)))
-#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+#define __pte_index(addr) (virt_to_pfn(addr) & (PTRS_PER_PTE - 1))
/*
* pte_offset gets a @ptr to PMD entry (PGD in our 2-tier paging system)