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[v2,09/16] Use semop syscall for Linux implementation

Message ID 1478114813-3526-10-git-send-email-adhemerval.zanella@linaro.org
State New
Headers show

Commit Message

Adhemerval Zanella Netto Nov. 2, 2016, 7:26 p.m. UTC 
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 semop syscall if it is supported by
kernel headers.

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

	* sysdeps/unix/sysv/linux/semop.c (semop): Use semop syscall if it is
	defined.
---
 ChangeLog                       |  3 +++
 sysdeps/unix/sysv/linux/semop.c | 10 ++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)
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Patch

diff --git a/sysdeps/unix/sysv/linux/semop.c b/sysdeps/unix/sysv/linux/semop.c
index 593eb4c..bd57009 100644
--- a/sysdeps/unix/sysv/linux/semop.c
+++ b/sysdeps/unix/sysv/linux/semop.c
@@ -16,17 +16,19 @@ 
    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 <sysdep.h>
-#include <sys/syscall.h>
+#include <errno.h>
 
 /* Perform user-defined atomical operation of array of semaphores.  */
 
 int
 semop (int semid, struct sembuf *sops, size_t nsops)
 {
-  return INLINE_SYSCALL (ipc, 5, IPCOP_semop, semid, (int) nsops, 0, sops);
+#ifdef __ASSUME_SYSVIPC_SYSCALL
+  return INLINE_SYSCALL_CALL (semop, semid, sops, nsops);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_semop, semid, nsops, 0, sops);
+#endif
 }