[PATCH v2 8/8] Optimize sigrelse implementation

[Adhemerval Zanella]

This patch simplifies sighold a bit by removing an extra sigprocmask
and using SIG_BLOCK (which union of the current set and the set argument).

Checked on x86_64-linux-gnu.

	* signal/sighold.c (sighold): Optimize implementation.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
---
 ChangeLog         |  2 ++
 signal/sigrelse.c | 12 +++---------
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/signal/sigrelse.c b/signal/sigrelse.c
index e41c2bd..61f240b 100644
--- a/signal/sigrelse.c
+++ b/signal/sigrelse.c
@@ -26,14 +26,8 @@ sigrelse (int sig)
 {
   sigset_t set;
 
-  /* Retrieve current signal set.  */
-  if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0)
+  sigemptyset (&set);
+  if (sigaddset (&set, sig) < 0)
     return -1;
-
-  /* Remove the specified signal.  */
-  if (sigdelset (&set, sig) < 0)
-    return -1;
-
-  /* Set the new mask.  */
-  return __sigprocmask (SIG_SETMASK, &set, NULL);
+  return __sigprocmask (SIG_UNBLOCK, &set, NULL);
 }
-- 
2.7.4