Use msgsnd syscall for Linux implementation

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

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

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgsnd): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/msgsnd.c (__libc_msgsnd): Use msgsnd syscall
	if defined.

11 files changed, 19 insertions, 13 deletions

diff --git a/ChangeLog b/ChangeLog
index d1dda4d9be..b494042a2b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
 2016-12-28  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgsnd): Remove.
+	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgsnd):
+	Likewise.
+	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgsnd):
+	Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgsnd): Likewise.
+	* sysdeps/unix/sysv/linux/msgsnd.c (__libc_msgsnd): Use msgsnd syscall
+	if defined.
+
 	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgctl): Remove.
 	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgctl): Likewise.
 	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
diff --git a/sysdeps/unix/sysv/linux/alpha/syscalls.list b/sysdeps/unix/sysv/linux/alpha/syscalls.list
index ddbd67282d..ced9c108fc 100644
--- a/sysdeps/unix/sysv/linux/alpha/syscalls.list
+++ b/sysdeps/unix/sysv/linux/alpha/syscalls.list
@@ -1,7 +1,6 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	osf_shmat	i:ipi	__shmat		shmat
 oldshmctl	EXTRA	shmctl		i:iip	__old_shmctl	shmctl@GLIBC_2.0
 shmdt		-	shmdt		i:s	__shmdt		shmdt
diff --git a/sysdeps/unix/sysv/linux/arm/syscalls.list b/sysdeps/unix/sysv/linux/arm/syscalls.list
index 297f7e7812..43c464d298 100644
--- a/sysdeps/unix/sysv/linux/arm/syscalls.list
+++ b/sysdeps/unix/sysv/linux/arm/syscalls.list
@@ -24,7 +24,6 @@ personality	EXTRA	personality	Ei:i	__personality	personality
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	shmat		i:ipi	__shmat		shmat
 shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
diff --git a/sysdeps/unix/sysv/linux/generic/syscalls.list b/sysdeps/unix/sysv/linux/generic/syscalls.list
index 6869a484ba..f65598aea0 100644
--- a/sysdeps/unix/sysv/linux/generic/syscalls.list
+++ b/sysdeps/unix/sysv/linux/generic/syscalls.list
@@ -2,7 +2,6 @@
 
 # SysV APIs
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 semget		-	semget		i:iii	__semget	semget
 semctl		-	semctl		i:iiii	__semctl	semctl
 semtimedop	-	semtimedop	i:ipip	semtimedop
diff --git a/sysdeps/unix/sysv/linux/hppa/syscalls.list b/sysdeps/unix/sysv/linux/hppa/syscalls.list
index e4e40a0df1..3fbd81a8cd 100644
--- a/sysdeps/unix/sysv/linux/hppa/syscalls.list
+++ b/sysdeps/unix/sysv/linux/hppa/syscalls.list
@@ -2,7 +2,6 @@
 
 # semaphore and shm system calls
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	shmat		i:ipi	__shmat		shmat
 shmctl		-	shmctl		i:iip	__shmctl	shmctl
 shmdt		-	shmdt		i:s	__shmdt		shmdt
diff --git a/sysdeps/unix/sysv/linux/ia64/syscalls.list b/sysdeps/unix/sysv/linux/ia64/syscalls.list
index a60e615566..9edcbe62e6 100644
--- a/sysdeps/unix/sysv/linux/ia64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/ia64/syscalls.list
@@ -6,7 +6,6 @@ getpriority	-	getpriority	i:ii	__getpriority	getpriority
 
 # semaphore and shm system calls
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	shmat		i:ipi	__shmat		shmat
 shmctl		-	shmctl		i:iip	__shmctl	shmctl
 shmdt		-	shmdt		i:s	__shmdt		shmdt
diff --git a/sysdeps/unix/sysv/linux/microblaze/syscalls.list b/sysdeps/unix/sysv/linux/microblaze/syscalls.list
index 99dc33b976..ed715bac91 100644
--- a/sysdeps/unix/sysv/linux/microblaze/syscalls.list
+++ b/sysdeps/unix/sysv/linux/microblaze/syscalls.list
@@ -9,7 +9,6 @@ personality	EXTRA	personality	Ei:i	__personality	personality
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
 msgget          -       msgget          i:ii    __msgget        msgget
-msgsnd          -       msgsnd          Ci:ibni __msgsnd        msgsnd
 shmat           -       shmat           i:ipi   __shmat         shmat
 shmdt           -       shmdt           i:s     __shmdt         shmdt
 shmget          -       shmget          i:iii   __shmget        shmget
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list b/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
index 07b421de27..4c59a33fa3 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
@@ -3,7 +3,6 @@
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	shmat		i:ipi	__shmat		shmat
 shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
diff --git a/sysdeps/unix/sysv/linux/msgsnd.c b/sysdeps/unix/sysv/linux/msgsnd.c
index 1457e434a0..53cf3c1de0 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 __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  return SYSCALL_CANCEL (msgsnd, msqid, msgp, msgsz, msgflg);
+#else
   return SYSCALL_CANCEL (ipc, IPCOP_msgsnd, msqid, msgsz, msgflg,
-			 (void *) msgp);
+			 msgp);
+#endif
 }
 weak_alias (__libc_msgsnd, msgsnd)
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
index 59b93fefe4..259bdfc961 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
@@ -2,7 +2,6 @@
 
 # semaphore and shm system calls
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 shmat		-	shmat		i:ipi	__shmat		shmat
 shmctl		-	shmctl		i:iip	__shmctl	shmctl
 shmdt		-	shmdt		i:s	__shmdt		shmdt
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index 7192a96c87..2d46bb36d0 100644
--- a/sysdeps/unix/sysv/linux/x86_64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
@@ -3,7 +3,6 @@
 arch_prctl	EXTRA	arch_prctl	i:ii	__arch_prctl	arch_prctl
 modify_ldt	EXTRA	modify_ldt	i:ipi	__modify_ldt	modify_ldt
 msgget		-	msgget		i:ii	__msgget	msgget
-msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 pread64		-	pread64		Ci:ipii	__libc_pread	__libc_pread64 __pread64 pread64 __pread pread
 preadv64	-	preadv		Ci:ipii	preadv64	preadv
 pwrite64	-	pwrite64	Ci:ipii	__libc_pwrite	__libc_pwrite64 __pwrite64 pwrite64 __pwrite pwrite