On 09/24, Geert Uytterhoeven wrote:
>
> On Sun, Aug 26, 2012 at 9:12 PM, Oleg Nesterov <oleg@xxxxxxxxxx> wrote:
> > + while ((work = ACCESS_ONCE(*pprev))) {
> > + read_barrier_depends();
Hmm. This should be smp_read_barrier_depends(), but this doesn't matter.
> Woops, h8300 doesn't have read_barrier_depends():
> kernel/task_work.c:38:3: error: implicit declaration of function
> 'read_barrier_depends' [-Werror=implicit-function-declaration]
> cc1: some warnings being treated as errors
> make[2]: *** [kernel/task_work.o] Error 1
Thanks...
> http://kisskb.ellerman.id.au/kisskb/buildresult/7238385/
>
> Perhaps an empty definition is fine? Most architectures have:
>
> #define read_barrier_depends() do { } while(0)
Yes. arch/h8300/include/asm/barrier.h has
#define smp_read_barrier_depends() read_barrier_depends()
so probably it should define read_barrier_depends() as well ?
Oleg.
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