From 26852d5cdb2bac01f2a48b815194a045e8a8e300 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 9 Feb 2005 12:59:39 +0000 Subject: [PATCH] Fix ptrace aliasing issue in copy_from_user_page / copy_to_user_page. Signed-off-by: Ralf Baechle --- include/asm-mips/cacheflush.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h index 635f1bfb40..3780c9f935 100644 --- a/include/asm-mips/cacheflush.h +++ b/include/asm-mips/cacheflush.h @@ -55,11 +55,17 @@ extern void (*flush_icache_range)(unsigned long start, unsigned long end); #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ + if (cpu_has_dc_aliases) \ + flush_cache_page(vma, vaddr); \ memcpy(dst, (void *) src, len); \ flush_icache_page(vma, page); \ } while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ - memcpy(dst, src, len) +do { \ + if (cpu_has_dc_aliases) \ + flush_cache_page(vma, vaddr); \ + memcpy(dst, src, len); \ +} while (0) extern void (*flush_cache_sigtramp)(unsigned long addr); extern void (*flush_icache_all)(void); -- 2.39.5