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| author |   Thomas Gleixner <tglx@linutronix.de> | 2020-11-03 10:27:22 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-06 23:14:56 +0100 |
| commit | 2a15ba82fa6ca3f35502b3060f22118a938d2889 (patch) | |
| tree | 7939b22f5d1db7d4969b9e037fb917b7675049ea /arch/arm/include/asm/highmem.h | |
| parent | arc/mm/highmem: Use generic kmap atomic implementation (diff) | |
| download | linux-dev-2a15ba82fa6ca3f35502b3060f22118a938d2889.tar.xz linux-dev-2a15ba82fa6ca3f35502b3060f22118a938d2889.zip | |
ARM: highmem: Switch to generic kmap atomic
No reason having the same code in every architecture.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20201103095857.582196476@linutronix.de
Diffstat (limited to 'arch/arm/include/asm/highmem.h')
| -rw-r--r-- | arch/arm/include/asm/highmem.h | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h index 31811be38d78..a41de523d053 100644 --- a/arch/arm/include/asm/highmem.h +++ b/arch/arm/include/asm/highmem.h @@ -2,7 +2,7 @@ #ifndef _ASM_HIGHMEM_H #define _ASM_HIGHMEM_H -#include <asm/kmap_types.h> +#include <asm/fixmap.h> #define PKMAP_BASE (PAGE_OFFSET - PMD_SIZE) #define LAST_PKMAP PTRS_PER_PTE @@ -46,19 +46,32 @@ extern pte_t *pkmap_page_table; #ifdef ARCH_NEEDS_KMAP_HIGH_GET extern void *kmap_high_get(struct page *page); -#else + +static inline void *arch_kmap_local_high_get(struct page *page) +{ + if (IS_ENABLED(CONFIG_DEBUG_HIGHMEM) && !cache_is_vivt()) + return NULL; + return kmap_high_get(page); +} +#define arch_kmap_local_high_get arch_kmap_local_high_get + +#else /* ARCH_NEEDS_KMAP_HIGH_GET */ static inline void *kmap_high_get(struct page *page) { return NULL; } -#endif +#endif /* !ARCH_NEEDS_KMAP_HIGH_GET */ -/* - * The following functions are already defined by <linux/highmem.h> - * when CONFIG_HIGHMEM is not set. - */ -#ifdef CONFIG_HIGHMEM -extern void *kmap_atomic_pfn(unsigned long pfn); -#endif +#define arch_kmap_local_post_map(vaddr, pteval) \ + local_flush_tlb_kernel_page(vaddr) + +#define arch_kmap_local_pre_unmap(vaddr) \ +do { \ + if (cache_is_vivt()) \ + __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); \ +} while (0) + +#define arch_kmap_local_post_unmap(vaddr) \ + local_flush_tlb_kernel_page(vaddr) #endif |