Consolidate Linux shmctl implementation

This patch consolidates the shmctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/shmctl.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.

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

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
	oldshmctl.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmctl): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmctl):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/alpha/shmctl.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/shmctl.c: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/shmctl.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/shmctl.c: Use default
	implementation.
	* sysdeps/unix/sysv/linux/shmctl.c (__new_shmctl): Use shmctl syscall
	if it is defined.

1 files changed, 27 insertions, 32 deletions

diff --git a/sysdeps/unix/sysv/linux/shmctl.c b/sysdeps/unix/sysv/linux/shmctl.c
index b2caf7543b..07725fedd1 100644
--- a/sysdeps/unix/sysv/linux/shmctl.c
+++ b/sysdeps/unix/sysv/linux/shmctl.c
@@ -16,18 +16,34 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
 #include <sys/shm.h>
+#include <stdarg.h>
 #include <ipc_priv.h>
-
 #include <sysdep.h>
-#include <string.h>
-#include <sys/syscall.h>
-#include <bits/wordsize.h>
 #include <shlib-compat.h>
+#include <errno.h>
+
+
+#ifndef DEFAULT_VERSION
+# define DEFAULT_VERSION GLIBC_2_2
+#endif
 
-#include <kernel-features.h>
 
+/* Provide operations to control over shared memory segments.  */
+int
+__new_shmctl (int shmid, int cmd, struct shmid_ds *buf)
+{
+#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  return INLINE_SYSCALL_CALL (shmctl, shmid, cmd | __IPC_64, buf);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd | __IPC_64, 0,
+			      buf);
+#endif
+}
+versioned_symbol (libc, __new_shmctl, shmctl, DEFAULT_VERSION);
+
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
 struct __old_shmid_ds
 {
   struct __old_ipc_perm shm_perm;	/* operation permission struct */
@@ -43,36 +59,15 @@ struct __old_shmid_ds
   struct vm_area_struct *__attaches;	/* descriptors for attaches */
 };
 
-struct __old_shminfo
-{
-  int shmmax;
-  int shmmin;
-  int shmmni;
-  int shmseg;
-  int shmall;
-};
-
-/* Provide operations to control over shared memory segments.  */
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
-int __old_shmctl (int, int, struct __old_shmid_ds *);
-#endif
-int __new_shmctl (int, int, struct shmid_ds *);
-
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
 int
 attribute_compat_text_section
 __old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf)
 {
-  return INLINE_SYSCALL (ipc, 5, IPCOP_shmctl, shmid, cmd, 0, buf);
+#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  return INLINE_SYSCALL_CALL (shmctl, shmid, cmd, buf);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd, 0, buf);
+#endif
 }
 compat_symbol (libc, __old_shmctl, shmctl, GLIBC_2_0);
 #endif
-
-int
-__new_shmctl (int shmid, int cmd, struct shmid_ds *buf)
-{
-  return INLINE_SYSCALL (ipc, 5, IPCOP_shmctl, shmid, cmd | __IPC_64, 0,
-			 buf);
-}
-
-versioned_symbol (libc, __new_shmctl, shmctl, GLIBC_2_2);