[ARM] 2896/1: Add sys_ipc_wrapper to pass 'fifth' argument on stack

Patch from George G. Davis

As pointed out be Matthew Klahn <MKLAHN@motorola.com>, some sys_ipc()
call options require six args, e.g. SEMTIMEDOP. This patch adds an ARM sys_ipc_wrapper to save the sys_ipc() 'fifth' arg on the stack.

Signed-off-by: George G. Davis <gdavis@mvista.com>
 arch/arm/kernel/calls.S        |    2 +-
 arch/arm/kernel/entry-common.S |    5 +++++
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 5 insertions, 1 deletions

diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 949ec4427f21..2ad4aa2a1536 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -131,7 +131,7 @@ __syscall_start:
                 .long   sys_wait4
 /* 115 */       .long   sys_swapoff
                 .long   sys_sysinfo
-                .long   sys_ipc
+                .long   sys_ipc_wrapper
                 .long   sys_fsync
                 .long   sys_sigreturn_wrapper
 /* 120 */       .long   sys_clone_wrapper
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index db302c6e5343..81d450ac3fab 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -273,6 +273,10 @@ sys_mbind_wrapper:
                 str     r5, [sp, #4]
                 b       sys_mbind
 
+sys_ipc_wrapper:
+                str     r5, [sp, #4]            @ push sixth arg
+                b       sys_ipc
+
 /*
  * Note: off_4k (r5) is always units of 4K.  If we can't do the requested
  * offset, we return EINVAL.