[03/15] Use msgsnd syscall for Linux implementation

Message ID 1478010323-13076-4-git-send-email-adhemerval.zanella@linaro.org
State Superseded
Headers show

Commit Message

Adhemerval Zanella Nov. 1, 2016, 2:25 p.m.
This patch add a direct call to msgsnd syscall if it is defined by
kernel headers.

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

	* sysdeps/unix/sysv/linux/msgsnd.c (__libc_msgsnd): Use msgsnd syscall
	if defined.
---
 ChangeLog                        | 3 +++
 sysdeps/unix/sysv/linux/msgsnd.c | 7 ++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

-- 
2.7.4

Patch

diff --git a/sysdeps/unix/sysv/linux/msgsnd.c b/sysdeps/unix/sysv/linux/msgsnd.c
index 1457e43..2928493 100644
--- a/sysdeps/unix/sysv/linux/msgsnd.c
+++ b/sysdeps/unix/sysv/linux/msgsnd.c
@@ -16,17 +16,18 @@ 
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
 #include <sys/msg.h>
 #include <ipc_priv.h>
-
 #include <sysdep-cancel.h>
-#include <sys/syscall.h>
 
 int
 __libc_msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
 {
+#ifdef __NR_msgsnd
+  return SYSCALL_CANCEL (msgsnd, msqid, msgp, msgsz, msgflg);
+#else
   return SYSCALL_CANCEL (ipc, IPCOP_msgsnd, msqid, msgsz, msgflg,
 			 (void *) msgp);
+#endif
 }
 weak_alias (__libc_msgsnd, msgsnd)