Em Tue, Oct 13, 2015 at 10:52:14AM +0200, Jiri Olsa escreveu:
> On Mon, Oct 12, 2015 at 05:48:17PM -0700, Vinson Lee wrote:
>
> SNIP
>
> > > __builtin_memcpy((void *)res, (const void *)p, size);
> > > @@ -59,11 +64,14 @@ static __always_inline void __read_once_size(const volatile void *p, void *res,
> > >
> > > static __always_inline void __write_once_size(volatile void *p, void *res, int size)
> > > {
> > > + u64_alias_t *u64_p = (u64_alias_t*) p;
> > > + u64_alias_t *u64_res = (u64_alias_t*) res;
> > > +
> > > switch (size) {
> > > case 1: *(volatile __u8 *)p = *(__u8 *)res; break;
> > > case 2: *(volatile __u16 *)p = *(__u16 *)res; break;
> > > case 4: *(volatile __u32 *)p = *(__u32 *)res; break;
> > > - case 8: *(volatile __u64 *)p = *(__u64 *)res; break;
> > > + case 8: *u64_p = *u64_res; break;
> > > default:
> > > barrier();
> > > __builtin_memcpy((void *)p, (const void *)res, size);
> >
> >
> > This patch fixes my perf build error with GCC 4.4.
> >
> > Vinson
>
> posting complete patch
Applied, with a tested-by Vinson,
thanks,
- Arnaldo
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