Fix ptrace aliasing issue in copy_from_user_page / copy_to_user_page. (26852d5c) · Commits · 戴 / test

include/asm-mips/cacheflush.h

+7 −1

Original line number	Diff line number	Diff line
		@@ -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);