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authorMichal Simek <monstr@monstr.eu>2009-07-13 16:46:54 +0200
committerMichal Simek <monstr@monstr.eu>2009-07-27 07:39:54 +0200
commit7bcb63b21327427b130edeb6e6ad44ee260b3043 (patch)
tree1e70546246b4c03ff7db40c600b4c5e06f9a6e1f /arch/microblaze
parentea3fd1466f81a851452bf7f34ccb9b5058e4793c (diff)
microblaze: Fix put_user macro for 64bits arguments
For 64bits arguments gcc caused that put_user macro works with wrong value because of optimalization. Adding volatile caused that gcc not optimized it. It is possible to use (as Blackfin do) two put_user macros with 32bits arguments but there is one more instruction which is due to duplication zero return value which is called put_user_asm macro. Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/include/asm/uaccess.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 65adad61e7e..5431b4631a7 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -189,7 +189,7 @@ extern long strnlen_user(const char *src, long count);
#define __put_user(x, ptr) \
({ \
- __typeof__(*(ptr)) __gu_val = x; \
+ __typeof__(*(ptr)) volatile __gu_val = (x); \
long __gu_err = 0; \
switch (sizeof(__gu_val)) { \
case 1: \