ARM: 6329/1: wire up sys_accept4() on ARM

sys_accept4() was added in kernel 2.6.28, but ARM was not updated
to include it.  The number and types of parameters is such that
no ARM-specific processing is needed, so wiring up sys_accept4()
just requires defining __NR_accept4 and adding a direct call in
the syscall entry table.

Tested with an EABI 2.6.35 kernel and Ulrich Drepper's original
accept4() test program, modified to define __NR_accept4 for ARM.

Using the updated unistd.h also eliminates a warning then building
glibc (2.10.2 and newer) about accept4() being unimplemented.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index dd2bf53000fe..d02cfb683487 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -392,6 +392,7 @@
 #define __NR_rt_tgsigqueueinfo          (__NR_SYSCALL_BASE+363)
 #define __NR_perf_event_open            (__NR_SYSCALL_BASE+364)
 #define __NR_recvmmsg                   (__NR_SYSCALL_BASE+365)
+#define __NR_accept4                    (__NR_SYSCALL_BASE+366)
 
 /*
  * The following SWIs are ARM private.
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 37ae301cc47c..afeb71fa72cb 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -375,6 +375,7 @@
                 CALL(sys_rt_tgsigqueueinfo)
                 CALL(sys_perf_event_open)
 /* 365 */       CALL(sys_recvmmsg)
+                CALL(sys_accept4)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted