[PATCH v2 08/16] Use semget syscall for Linux implementation

[Adhemerval Zanella]

Changes from previous version:

  - Use __ASSUME_SYSVIPC_SYSCALL instead of __NR_syscall to issue the
    wired syscall or the ipc one.

--

This patch add a direct call to semget syscall if it is supported by
kernel features.

hecked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/semget.c (semget): Use semget syscall
	if it is defined.
---
 ChangeLog                        |  3 +++
 sysdeps/unix/sysv/linux/semget.c | 11 ++++++-----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/semget.c b/sysdeps/unix/sysv/linux/semget.c
index 52189fd..efdd967 100644
--- a/sysdeps/unix/sysv/linux/semget.c
+++ b/sysdeps/unix/sysv/linux/semget.c
@@ -16,13 +16,10 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
 #include <sys/sem.h>
 #include <ipc_priv.h>
-#include <stdlib.h>		/* for definition of NULL */
-
 #include <sysdep.h>
-#include <sys/syscall.h>
+#include <errno.h>
 
 /* Return identifier for array of NSEMS semaphores associated with
    KEY.  */
@@ -30,5 +27,9 @@
 int
 semget (key_t key, int nsems, int semflg)
 {
-  return INLINE_SYSCALL (ipc, 5, IPCOP_semget, key, nsems, semflg, NULL);
+#ifdef __ASSUME_SYSVIPC_SYSCALL
+  return INLINE_SYSCALL_CALL (semget, key, nsems, semflg);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_semget, key, nsems, semflg, NULL);
+#endif
 }
-- 
2.7.4