Hi Jan,
On 11/03/2019 16:49, Jan Beulich wrote:
The memory operand is an in/out one, and the auxiliary register gets
written to early.
Take the opportunity and also drop the redundant cast (the inline
functions' parameters are already of the casted-to type).
Signed-off-by: Jan Beulich <jbeul...@suse.com>
I guess this is candidate for backporting.
Reviewed-by: Julien Grall <julien.gr...@arm.com>
Cheers,
--- a/xen/include/asm-arm/atomic.h
+++ b/xen/include/asm-arm/atomic.h
@@ -30,7 +30,7 @@ static inline void name(volatile type *a
asm volatile("ldr" size " %"width"1,%0\n" \
"add %"width"1,%"width"1,%"width"2\n" \
"str" size " %"width"1,%0" \
- : "=m" (*(volatile type *)addr), "=r" (t) \
+ : "+m" (*addr), "=&r" (t) \
: reg (val)); \
}
--
Julien Grall
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