Commit 7bcb63b2 authored Jul 13, 2009 by Michal Simek

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>

parent ea3fd146

arch/microblaze/include/asm/uaccess.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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: \