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authorRalf Baechle <ralf@linux-mips.org>2005-02-09 12:59:39 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:30:29 +0100
commit26852d5cdb2bac01f2a48b815194a045e8a8e300 (patch)
tree2a70644d2ddd04d24b92dc272b87bd235a19f5e7 /include/asm-mips/cacheflush.h
parent505403b6a02aefc47c038acf56b719497b720012 (diff)
Fix ptrace aliasing issue in copy_from_user_page / copy_to_user_page.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/cacheflush.h')
-rw-r--r--include/asm-mips/cacheflush.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h
index 635f1bfb403..3780c9f9354 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);