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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-04 11:22:27 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-26 20:07:41 +0000 |
| commit | 0d31fe47b0f62e6546779eae2fc9b2e024aff4ce (patch) | |
| tree | 6e1a619868e7e8bde6180d73c75ea7ab6f131e9b | |
| parent | 67ece1443174d852e71c42facb3e2d7dd338c88a (diff) | |
| download | linux-0d31fe47b0f62e6546779eae2fc9b2e024aff4ce.tar.bz2 | |
ARM: pgtable: provide get_top_pte() to complement set_top_pte()
Provide get_top_pte() to complement set_top_pte(), moving the only
users of TOP_PTE to arch/arm/mm/mm.h.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mm/highmem.c | 8 | ||||
| -rw-r--r-- | arch/arm/mm/mm.h | 5 |
2 files changed, 8 insertions, 5 deletions
diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c index 35352517a5d4..3a9e8aa19759 100644 --- a/arch/arm/mm/highmem.c +++ b/arch/arm/mm/highmem.c @@ -69,7 +69,7 @@ void *__kmap_atomic(struct page *page) * With debugging enabled, kunmap_atomic forces that entry to 0. * Make sure it was indeed properly unmapped. */ - BUG_ON(!pte_none(*(TOP_PTE(vaddr)))); + BUG_ON(!pte_none(get_top_pte(vaddr))); #endif /* * When debugging is off, kunmap_atomic leaves the previous mapping @@ -119,7 +119,7 @@ void *kmap_atomic_pfn(unsigned long pfn) idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #ifdef CONFIG_DEBUG_HIGHMEM - BUG_ON(!pte_none(*(TOP_PTE(vaddr)))); + BUG_ON(!pte_none(get_top_pte(vaddr))); #endif set_top_pte(vaddr, pfn_pte(pfn, kmap_prot)); @@ -129,11 +129,9 @@ void *kmap_atomic_pfn(unsigned long pfn) struct page *kmap_atomic_to_page(const void *ptr) { unsigned long vaddr = (unsigned long)ptr; - pte_t *pte; if (vaddr < FIXADDR_START) return virt_to_page(ptr); - pte = TOP_PTE(vaddr); - return pte_page(*pte); + return pte_page(get_top_pte(vaddr)); } diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index a4e7febeb6a1..1651d5aa04a6 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -24,6 +24,11 @@ static inline void set_top_pte(unsigned long va, pte_t pte) local_flush_tlb_kernel_page(va); } +static inline pte_t get_top_pte(unsigned long va) +{ + return *TOP_PTE(va); +} + static inline pmd_t *pmd_off_k(unsigned long virt) { return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); |