From: Ira Weiny ira.weiny@intel.com
To support kmap_atomic_prot(), all architectures need to support protections passed to their kmap_atomic_high() function. Pass protections into kmap_atomic_high() and change the name to kmap_atomic_high_prot() to match.
Then define kmap_atomic_prot() as a core function which calls kmap_atomic_high_prot() when needed.
Finally, redefine kmap_atomic() as a wrapper of kmap_atomic_prot() with the default kmap_prot exported by the architectures.
Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Ira Weiny ira.weiny@intel.com
--- Changes from V1: Adjust for bisect-ability Adjust for removing kunmap_atomic_high Remove kmap_atomic_high_prot declarations --- arch/arc/mm/highmem.c | 6 +++--- arch/arm/mm/highmem.c | 6 +++--- arch/csky/mm/highmem.c | 6 +++--- arch/microblaze/include/asm/highmem.h | 16 ---------------- arch/mips/mm/highmem.c | 6 +++--- arch/nds32/mm/highmem.c | 6 +++--- arch/powerpc/include/asm/highmem.h | 17 ----------------- arch/sparc/mm/highmem.c | 6 +++--- arch/x86/include/asm/highmem.h | 14 -------------- arch/xtensa/mm/highmem.c | 6 +++--- include/linux/highmem.h | 7 ++++--- 11 files changed, 25 insertions(+), 71 deletions(-)
diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c index 5d3eab4ac0b0..479b0d72d3cf 100644 --- a/arch/arc/mm/highmem.c +++ b/arch/arc/mm/highmem.c @@ -49,7 +49,7 @@ extern pte_t * pkmap_page_table; static pte_t * fixmap_page_table;
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { int idx, cpu_idx; unsigned long vaddr; @@ -59,11 +59,11 @@ void *kmap_atomic_high(struct page *page) vaddr = FIXMAP_ADDR(idx);
set_pte_at(&init_mm, vaddr, fixmap_page_table + idx, - mk_pte(page, kmap_prot)); + mk_pte(page, prot));
return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kv) { diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c index ac8394655a6e..e013f6b81328 100644 --- a/arch/arm/mm/highmem.c +++ b/arch/arm/mm/highmem.c @@ -31,7 +31,7 @@ static inline pte_t get_fixmap_pte(unsigned long vaddr) return *ptep; }
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { unsigned int idx; unsigned long vaddr; @@ -67,11 +67,11 @@ void *kmap_atomic_high(struct page *page) * in place, so the contained TLB flush ensures the TLB is updated * with the new mapping. */ - set_fixmap_pte(idx, mk_pte(page, kmap_prot)); + set_fixmap_pte(idx, mk_pte(page, prot));
return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/arch/csky/mm/highmem.c b/arch/csky/mm/highmem.c index f4311669b5bb..3ae5c8cd7619 100644 --- a/arch/csky/mm/highmem.c +++ b/arch/csky/mm/highmem.c @@ -21,7 +21,7 @@ EXPORT_SYMBOL(kmap_flush_tlb);
EXPORT_SYMBOL(kmap);
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { unsigned long vaddr; int idx, type; @@ -32,12 +32,12 @@ void *kmap_atomic_high(struct page *page) #ifdef CONFIG_DEBUG_HIGHMEM BUG_ON(!pte_none(*(kmap_pte - idx))); #endif - set_pte(kmap_pte-idx, mk_pte(page, kmap_prot)); + set_pte(kmap_pte-idx, mk_pte(page, prot)); flush_tlb_one((unsigned long)vaddr);
return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/arch/microblaze/include/asm/highmem.h b/arch/microblaze/include/asm/highmem.h index 90d96239152f..d7c55cfd27bd 100644 --- a/arch/microblaze/include/asm/highmem.h +++ b/arch/microblaze/include/asm/highmem.h @@ -51,22 +51,6 @@ extern pte_t *pkmap_page_table; #define PKMAP_NR(virt) ((virt - PKMAP_BASE) >> PAGE_SHIFT) #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); -static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) -{ - preempt_disable(); - pagefault_disable(); - if (!PageHighMem(page)) - return page_address(page); - - return kmap_atomic_high_prot(page, prot); -} - -static inline void *kmap_atomic_high(struct page *page) -{ - return kmap_atomic_high_prot(page, kmap_prot); -} - #define flush_cache_kmaps() { flush_icache(); flush_dcache(); }
#endif /* __KERNEL__ */ diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c index 87023bd1a33c..37e244cdb14e 100644 --- a/arch/mips/mm/highmem.c +++ b/arch/mips/mm/highmem.c @@ -18,7 +18,7 @@ void kmap_flush_tlb(unsigned long addr) } EXPORT_SYMBOL(kmap_flush_tlb);
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { unsigned long vaddr; int idx, type; @@ -29,12 +29,12 @@ void *kmap_atomic_high(struct page *page) #ifdef CONFIG_DEBUG_HIGHMEM BUG_ON(!pte_none(*(kmap_pte - idx))); #endif - set_pte(kmap_pte-idx, mk_pte(page, kmap_prot)); + set_pte(kmap_pte-idx, mk_pte(page, prot)); local_flush_tlb_one((unsigned long)vaddr);
return (void*) vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/arch/nds32/mm/highmem.c b/arch/nds32/mm/highmem.c index 809f8c830f06..63ded527c1e8 100644 --- a/arch/nds32/mm/highmem.c +++ b/arch/nds32/mm/highmem.c @@ -10,7 +10,7 @@ #include <asm/fixmap.h> #include <asm/tlbflush.h>
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { unsigned int idx; unsigned long vaddr, pte; @@ -21,7 +21,7 @@ void *kmap_atomic_high(struct page *page)
idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - pte = (page_to_pfn(page) << PAGE_SHIFT) | (kmap_prot); + pte = (page_to_pfn(page) << PAGE_SHIFT) | prot; ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr); set_pte(ptep, pte);
@@ -32,7 +32,7 @@ void *kmap_atomic_high(struct page *page) return (void *)vaddr; }
-EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h index ee5de974c5ef..8d8ee3fcd800 100644 --- a/arch/powerpc/include/asm/highmem.h +++ b/arch/powerpc/include/asm/highmem.h @@ -59,23 +59,6 @@ extern pte_t *pkmap_page_table; #define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); -static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) -{ - preempt_disable(); - pagefault_disable(); - if (!PageHighMem(page)) - return page_address(page); - - return kmap_atomic_high_prot(page, prot); -} - -static inline void *kmap_atomic_high(struct page *page) -{ - return kmap_atomic_high_prot(page, kmap_prot); -} - - #define flush_cache_kmaps() flush_cache_all()
#endif /* __KERNEL__ */ diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c index 9f06d75e88e1..414f578d1e57 100644 --- a/arch/sparc/mm/highmem.c +++ b/arch/sparc/mm/highmem.c @@ -54,7 +54,7 @@ void __init kmap_init(void) kmap_prot = __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE); }
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { unsigned long vaddr; long idx, type; @@ -73,7 +73,7 @@ void *kmap_atomic_high(struct page *page) #ifdef CONFIG_DEBUG_HIGHMEM BUG_ON(!pte_none(*(kmap_pte-idx))); #endif - set_pte(kmap_pte-idx, mk_pte(page, kmap_prot)); + set_pte(kmap_pte-idx, mk_pte(page, prot)); /* XXX Fix - Anton */ #if 0 __flush_tlb_one(vaddr); @@ -83,7 +83,7 @@ void *kmap_atomic_high(struct page *page)
return (void*) vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/arch/x86/include/asm/highmem.h b/arch/x86/include/asm/highmem.h index be66b77885a0..0f420b24e0fc 100644 --- a/arch/x86/include/asm/highmem.h +++ b/arch/x86/include/asm/highmem.h @@ -58,20 +58,6 @@ extern unsigned long highstart_pfn, highend_pfn; #define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); -static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) -{ - preempt_disable(); - pagefault_disable(); - if (!PageHighMem(page)) - return page_address(page); - - return kmap_atomic_high_prot(page, prot); -} -static inline void *kmap_atomic_high(struct page *page) -{ - return kmap_atomic_high_prot(page, kmap_prot); -} void *kmap_atomic_pfn(unsigned long pfn); void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c index 50168b09510a..99b5ad137ab5 100644 --- a/arch/xtensa/mm/highmem.c +++ b/arch/xtensa/mm/highmem.c @@ -37,7 +37,7 @@ static inline enum fixed_addresses kmap_idx(int type, unsigned long color) color; }
-void *kmap_atomic_high(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { enum fixed_addresses idx; unsigned long vaddr; @@ -48,11 +48,11 @@ void *kmap_atomic_high(struct page *page) #ifdef CONFIG_DEBUG_HIGHMEM BUG_ON(!pte_none(*(kmap_pte + idx))); #endif - set_pte(kmap_pte + idx, mk_pte(page, kmap_prot)); + set_pte(kmap_pte + idx, mk_pte(page, prot));
return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic_high); +EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr) { diff --git a/include/linux/highmem.h b/include/linux/highmem.h index c36c0ee09423..89838306f50d 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -32,7 +32,7 @@ static inline void invalidate_kernel_vmap_range(void *vaddr, int size) #include <asm/kmap_types.h>
#ifdef CONFIG_HIGHMEM -extern void *kmap_atomic_high(struct page *page); +extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); extern void kunmap_atomic_high(void *kvaddr); #include <asm/highmem.h>
@@ -76,14 +76,15 @@ static inline void kunmap(struct page *page) * be used in IRQ contexts, so in some (very limited) cases we need * it. */ -static inline void *kmap_atomic(struct page *page) +static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) { preempt_disable(); pagefault_disable(); if (!PageHighMem(page)) return page_address(page); - return kmap_atomic_high(page); + return kmap_atomic_high_prot(page, prot); } +#define kmap_atomic(page) kmap_atomic_prot(page, kmap_prot)
/* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void);