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microblaze: Fix put_user macro for 64bits arguments

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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>
This commit is contained in:
Michal Simek
2009-07-13 16:46:54 +02:00
parent ea3fd1466f
commit 7bcb63b213
1 changed files with 1 additions and 1 deletions
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2
arch/microblaze/include/asm/uaccess.h
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@@ -189,7 +189,7 @@ extern long strnlen_user(const char *src, long count);
#define __put_user(x, ptr) \ #define __put_user(x, ptr) \
({ \ ({ \
__typeof__(*(ptr)) __gu_val = x; \ __typeof__(*(ptr)) volatile __gu_val = (x); \
long __gu_err = 0; \ long __gu_err = 0; \
switch (sizeof(__gu_val)) { \ switch (sizeof(__gu_val)) { \
case 1: \ case 1: \