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[PATCH v3 15/17] Use shmdt syscall for linux implementation


Changes from previous version:

  - Remove shmdt from syscalls.list.

--

this patch add a direct call to shmdt syscall if it is supported by
kernel features.

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

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmdt): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmdt):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmdt):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/shmdt.c (shmdt): Use shmdt syscall if it is
	defined.
---
 ChangeLog                                          | 14 ++++++++++++++
 sysdeps/unix/sysv/linux/alpha/syscalls.list        |  1 -
 sysdeps/unix/sysv/linux/arm/syscalls.list          |  1 -
 sysdeps/unix/sysv/linux/generic/syscalls.list      |  1 -
 sysdeps/unix/sysv/linux/hppa/syscalls.list         |  1 -
 sysdeps/unix/sysv/linux/ia64/syscalls.list         |  1 -
 sysdeps/unix/sysv/linux/microblaze/syscalls.list   |  1 -
 sysdeps/unix/sysv/linux/mips/mips64/syscalls.list  |  1 -
 sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list |  1 -
 sysdeps/unix/sysv/linux/shmdt.c                    | 12 +++++++-----
 sysdeps/unix/sysv/linux/x86_64/syscalls.list       |  1 -
 11 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/alpha/syscalls.list b/sysdeps/unix/sysv/linux/alpha/syscalls.list
index bf9c8ad..096bf22 100644
--- a/sysdeps/unix/sysv/linux/alpha/syscalls.list
+++ b/sysdeps/unix/sysv/linux/alpha/syscalls.list
@@ -1,6 +1,5 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
 
 sigstack	-	sigstack	2	sigstack
diff --git a/sysdeps/unix/sysv/linux/arm/syscalls.list b/sysdeps/unix/sysv/linux/arm/syscalls.list
index f50a5cf..b1ea664 100644
--- a/sysdeps/unix/sysv/linux/arm/syscalls.list
+++ b/sysdeps/unix/sysv/linux/arm/syscalls.list
@@ -23,7 +23,6 @@ personality	EXTRA	personality	Ei:i	__personality	personality
 
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
 
 # proper socket implementations:
diff --git a/sysdeps/unix/sysv/linux/generic/syscalls.list b/sysdeps/unix/sysv/linux/generic/syscalls.list
index 80244c4..51ce148 100644
--- a/sysdeps/unix/sysv/linux/generic/syscalls.list
+++ b/sysdeps/unix/sysv/linux/generic/syscalls.list
@@ -2,7 +2,6 @@
 
 # SysV APIs
 shmget		-	shmget		i:iii	__shmget	shmget
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 
 # Socket APIs
 socket		-	socket		i:iii	__socket	socket
diff --git a/sysdeps/unix/sysv/linux/hppa/syscalls.list b/sysdeps/unix/sysv/linux/hppa/syscalls.list
index d755bfd..e75dd43 100644
--- a/sysdeps/unix/sysv/linux/hppa/syscalls.list
+++ b/sysdeps/unix/sysv/linux/hppa/syscalls.list
@@ -1,7 +1,6 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
 # semaphore and shm system calls
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
 
 # proper socket implementations:
diff --git a/sysdeps/unix/sysv/linux/ia64/syscalls.list b/sysdeps/unix/sysv/linux/ia64/syscalls.list
index 90bd870..5ebade1 100644
--- a/sysdeps/unix/sysv/linux/ia64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/ia64/syscalls.list
@@ -5,7 +5,6 @@ umount2		-	umount		2	__umount2	umount2
 getpriority	-	getpriority	i:ii	__getpriority	getpriority
 
 # semaphore and shm system calls
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
 
 # proper socket implementations:
diff --git a/sysdeps/unix/sysv/linux/microblaze/syscalls.list b/sysdeps/unix/sysv/linux/microblaze/syscalls.list
index 8b844f2..7a5666f 100644
--- a/sysdeps/unix/sysv/linux/microblaze/syscalls.list
+++ b/sysdeps/unix/sysv/linux/microblaze/syscalls.list
@@ -8,5 +8,4 @@ personality	EXTRA	personality	Ei:i	__personality	personality
 
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
-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 c6883c5..461b4ef 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
@@ -5,5 +5,4 @@ truncate	-	truncate	i:si	truncate	truncate64
 
 # Semaphore and shm system calls.  msgctl, shmctl, and semctl have C
 # wrappers (to set __IPC_64).
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
index 4d478ce..0ccbffa 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
@@ -1,5 +1,4 @@
 # File name     Caller  Syscall name    # args  Strong name     Weak names
 
 # semaphore and shm system calls
-shmdt           -       shmdt           i:s     __shmdt         shmdt
 shmget          -       shmget          i:iii   __shmget        shmget
diff --git a/sysdeps/unix/sysv/linux/shmdt.c b/sysdeps/unix/sysv/linux/shmdt.c
index 7224d6f..9475161 100644
--- a/sysdeps/unix/sysv/linux/shmdt.c
+++ b/sysdeps/unix/sysv/linux/shmdt.c
@@ -16,12 +16,10 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <sys/shm.h>
+#include <sys/msg.h>
 #include <ipc_priv.h>
-
 #include <sysdep.h>
-#include <sys/syscall.h>
+#include <errno.h>
 
 /* Detach shared memory segment starting at address specified by SHMADDR
    from the caller's data segment.  */
@@ -29,5 +27,9 @@
 int
 shmdt (const void *shmaddr)
 {
-  return INLINE_SYSCALL (ipc, 5, IPCOP_shmdt, 0, 0, 0, (void *) shmaddr);
+#ifdef __ASSUME_SYSVIPC_SYSCALL
+  return INLINE_SYSCALL_CALL (shmdt, shmaddr);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_shmdt, 0, 0, 0, shmaddr);
+#endif
 }
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index a5db9dc..65a03ff 100644
--- a/sysdeps/unix/sysv/linux/x86_64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
@@ -2,7 +2,6 @@
 
 arch_prctl	EXTRA	arch_prctl	i:ii	__arch_prctl	arch_prctl
 modify_ldt	EXTRA	modify_ldt	i:ipi	__modify_ldt	modify_ldt
-shmdt		-	shmdt		i:s	__shmdt		shmdt
 shmget		-	shmget		i:iii	__shmget	shmget
 syscall_clock_gettime	EXTRA	clock_gettime	Ei:ip		__syscall_clock_gettime
 
-- 
2.7.4


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