[RFC PATCH 2/9] arm: allocate sys_membarrier system call number

Mathieu Desnoyers
2015-08-27T18:03:37Z

[ Untested on this architecture. To try it out: fetch linux-next/akpm,
apply this patch, build/run a membarrier-enabled kernel, and do make
kselftest. ]

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: linux-api@vger.kernel.org
CC: Russell King <linux@arm.linux.org.uk>
---
arch/arm/include/asm/unistd.h | 2 +-
arch/arm/include/uapi/asm/unistd.h | 1 +
arch/arm/kernel/calls.S | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index 32640c4..d93876c 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -19,7 +19,7 @@
* This may need to be greater than __NR_last_syscall+1 in order to
* account for the padding in the syscall table
*/
-#define __NR_syscalls (388)
+#define __NR_syscalls (389)

/*
* *NOTE*: This is a ghost syscall private to the kernel. Only the
diff --git a/arch/arm/include/uapi/asm/unistd.h b/arch/arm/include/uapi/asm/unistd.h
index 0c3f5a0..436bb32 100644
--- a/arch/arm/include/uapi/asm/unistd.h
+++ b/arch/arm/include/uapi/asm/unistd.h
@@ -414,6 +414,7 @@
#define __NR_memfd_create (__NR_SYSCALL_BASE+385)
#define __NR_bpf (__NR_SYSCALL_BASE+386)
#define __NR_execveat (__NR_SYSCALL_BASE+387)
+#define __NR_membarrier (__NR_SYSCALL_BASE+388)

/*
* The following SWIs are ARM private.
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 05745eb..310699c 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -397,6 +397,7 @@
/* 385 */ CALL(sys_memfd_create)
CALL(sys_bpf)
CALL(sys_execveat)
+ CALL(sys_membarrier)
#ifndef syscalls_counted
.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
#define syscalls_counted
--
1.9.1