Fix ptrace aliasing issue in copy_from_user_page / copy_to_user_page.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h
index 635f1bf..3780c9f 100644
--- a/include/asm-mips/cacheflush.h
+++ b/include/asm-mips/cacheflush.h
@@ -55,11 +55,17 @@
#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);