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-rw-r--r--include/linux/signal.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h
index ea9eff16c4b7..b7d093520bb6 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -94,6 +94,23 @@ static inline int sigfindinword(unsigned long word)
#endif /* __HAVE_ARCH_SIG_BITOPS */
+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] |
+ set->sig[1] | set->sig[0]) == 0;
+ case 2:
+ return (set->sig[1] | set->sig[0]) == 0;
+ case 1:
+ return set->sig[0] == 0;
+ default:
+ _NSIG_WORDS_is_unsupported_size();
+ return 0;
+ }
+}
+
#define sigmask(sig) (1UL << ((sig) - 1))
#ifndef __HAVE_ARCH_SIG_SETOPS