On Fri, Sep 19, 2014 at 07:20:30PM +0200, Oleg Nesterov wrote:
> On 09/19, Richard Weinberger wrote:
> >
> > Am 19.09.2014 17:37, schrieb Jeff Kirsher:
> > >
> > > See patch 1 of the series.
> >
> > I was not CC'ed...
>
> Me too, and thus I don't understand this patch.
>
> But I have to admit it looks a bit ugly to me anyway.
> Can't we simply kill _NSIG_WORDS_is_unsupported_size ?
This looks quite preferable. Can you post that with a commit message
and signoff? Also, the indentation on the second of the three BUILD_BUG
calls has some spaces in it, which it shouldn't. With those fixed:
Reviewed-by: Josh Triplett <j...@joshtriplett.org>
> diff --git a/include/linux/signal.h b/include/linux/signal.h
> index 750196f..679c9b4 100644
> --- a/include/linux/signal.h
> +++ b/include/linux/signal.h
> @@ -67,7 +67,6 @@ static inline int sigismember(sigset_t *set, int _sig)
>
> static inline int sigisemptyset(sigset_t *set)
> {
> - extern void _NSIG_WORDS_is_unsupported_size(void);
> switch (_NSIG_WORDS) {
> case 4:
> return (set->sig[3] | set->sig[2] |
> @@ -77,7 +76,7 @@ static inline int sigisemptyset(sigset_t *set)
> case 1:
> return set->sig[0] == 0;
> default:
> - _NSIG_WORDS_is_unsupported_size();
> + BUILD_BUG();
> return 0;
> }
> }
> @@ -90,7 +89,6 @@ static inline int sigisemptyset(sigset_t *set)
> #define _SIG_SET_BINOP(name, op) \
> static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \
> { \
> - extern void _NSIG_WORDS_is_unsupported_size(void); \
> unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
> \
> switch (_NSIG_WORDS) { \
> @@ -107,7 +105,7 @@ static inline void name(sigset_t *r, const sigset_t *a,
> const sigset_t *b) \
> r->sig[0] = op(a0, b0); \
> break; \
> default: \
> - _NSIG_WORDS_is_unsupported_size(); \
> + BUILD_BUG(); \
> } \
> }
>
> @@ -128,8 +126,6 @@ _SIG_SET_BINOP(sigandnsets, _sig_andn)
> #define _SIG_SET_OP(name, op)
> \
> static inline void name(sigset_t *set)
> \
> { \
> - extern void _NSIG_WORDS_is_unsupported_size(void); \
> - \
> switch (_NSIG_WORDS) { \
> case 4: set->sig[3] = op(set->sig[3]); \
> set->sig[2] = op(set->sig[2]); \
> @@ -137,7 +133,7 @@ static inline void name(sigset_t *set)
> \
> case 1: set->sig[0] = op(set->sig[0]); \
> break; \
> default: \
> - _NSIG_WORDS_is_unsupported_size(); \
> + BUILD_BUG(); \
> } \
> }
>
>
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