[PATCH 10/31] alpha: use asm-generic/cacheflush.h
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-10 07:58:22
Also in:
linux-alpha, linux-arch, linux-arm-kernel, linux-fsdevel, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-sh, linux-um, lkml, sparclinux
Subsystem:
alpha port, the rest · Maintainers:
Richard Henderson, Matt Turner, Magnus Lindholm, Linus Torvalds
Alpha needs almost no cache flushing routines of its own. Rely on asm-generic/cacheflush.h for the defaults. Signed-off-by: Christoph Hellwig <hch@lst.de> --- arch/alpha/include/asm/cacheflush.h | 28 ++++++---------------------- 1 file changed, 6 insertions(+), 22 deletions(-)
diff --git a/arch/alpha/include/asm/cacheflush.h b/arch/alpha/include/asm/cacheflush.h
index 89128489cb598..636d7ca0d05f6 100644
--- a/arch/alpha/include/asm/cacheflush.h
+++ b/arch/alpha/include/asm/cacheflush.h@@ -4,19 +4,6 @@ #include <linux/mm.h> -/* Caches aren't brain-dead on the Alpha. */ -#define flush_cache_all() do { } while (0) -#define flush_cache_mm(mm) do { } while (0) -#define flush_cache_dup_mm(mm) do { } while (0) -#define flush_cache_range(vma, start, end) do { } while (0) -#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) -#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 -#define flush_dcache_page(page) do { } while (0) -#define flush_dcache_mmap_lock(mapping) do { } while (0) -#define flush_dcache_mmap_unlock(mapping) do { } while (0) -#define flush_cache_vmap(start, end) do { } while (0) -#define flush_cache_vunmap(start, end) do { } while (0) - /* Note that the following two definitions are _highly_ dependent on the contexts in which they are used in the kernel. I personally think it is criminal how loosely defined these macros are. */
@@ -59,20 +46,17 @@ flush_icache_user_range(struct vm_area_struct *vma, struct page *page, mm->context[smp_processor_id()] = 0; } } -#else +#define flush_icache_user_range flush_icache_user_range +#else /* CONFIG_SMP */ extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long addr, int len); -#endif +#define flush_icache_user_range flush_icache_user_range +#endif /* CONFIG_SMP */ /* This is used only in __do_fault and do_swap_page. */ #define flush_icache_page(vma, page) \ - flush_icache_user_range((vma), (page), 0, 0) + flush_icache_user_range((vma), (page), 0, 0) -#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ -do { memcpy(dst, src, len); \ - flush_icache_user_range(vma, page, vaddr, len); \ -} while (0) -#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ - memcpy(dst, src, len) +#include <asm-generic/cacheflush.h> #endif /* _ALPHA_CACHEFLUSH_H */
--
2.26.2