Commit 26852d5c authored by Ralf Baechle's avatar Ralf Baechle
Browse files

Fix ptrace aliasing issue in copy_from_user_page / copy_to_user_page. 



Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 505403b6

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);