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authorYoshinori Sato <ysato@users.sourceforge.jp>2008-03-13 12:32:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-13 13:11:43 -0700
commit12d48739d0b5d96efe6b7d26107f5572c6215f4a (patch)
tree0a2fa386b8d3449900caf1150093698d0b4373f1 /include/asm-h8300
parentfb39380b8d683b55630ba5ba381f4e43e417420e (diff)
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h8300: fix recent uaccess breakage
Al Viro wrote: > > After that commit in asm-h8300/uaccess.h we have > > #define get_user(x, ptr) \ > ({ \ > int __gu_err = 0; \ > uint32_t __gu_val = 0; \ > ^^^^^^^^^^^^^^^^^ > switch (sizeof(*(ptr))) { \ > case 1: \ > case 2: \ > case 4: \ > __gu_val = *(ptr); \ > break; \ > case 8: \ > memcpy(&__gu_val, ptr, sizeof (*(ptr))); \ > ^^^^^^^^^^^^^^^^ > > which, of course, is FUBAR whenever we actually hit that case - memcpy of > 8 bytes into uint32_t is obviously wrong. Why don't we simply do Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-h8300')
-rw-r--r--include/asm-h8300/uaccess.h11
1 files changed, 4 insertions, 7 deletions
diff --git a/include/asm-h8300/uaccess.h b/include/asm-h8300/uaccess.h
index a22350ec271..356068cd087 100644
--- a/include/asm-h8300/uaccess.h
+++ b/include/asm-h8300/uaccess.h
@@ -91,22 +91,19 @@ extern int __put_user_bad(void);
#define get_user(x, ptr) \
({ \
int __gu_err = 0; \
- uint32_t __gu_val = 0; \
+ typeof(*(ptr)) __gu_val = *ptr; \
switch (sizeof(*(ptr))) { \
case 1: \
case 2: \
case 4: \
- __gu_val = *(ptr); \
- break; \
- case 8: \
- memcpy(&__gu_val, ptr, sizeof (*(ptr))); \
+ case 8: \
break; \
default: \
- __gu_val = 0; \
__gu_err = __get_user_bad(); \
+ __gu_val = 0; \
break; \
} \
- (x) = (typeof(*(ptr)))__gu_val; \
+ (x) = __gu_val; \
__gu_err; \
})
#define __get_user(x, ptr) get_user(x, ptr)