s390/syscalls: wire up kcmp system call

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 11 insertions, 1 deletions

diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index da2c2f4f7642..4e64b5cd1558 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -278,7 +278,8 @@
 #define __NR_process_vm_readv   340
 #define __NR_process_vm_writev  341
 #define __NR_s390_runtime_instr 342
-#define NR_syscalls 343
+#define __NR_kcmp               343
+#define NR_syscalls 344
 
 /* 
  * There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 5f7928fe34ce..3afba804fe97 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1651,3 +1651,11 @@ ENTRY(sys_s390_runtime_instr_wrapper)
         lgfr    %r2,%r2                 # int
         lgfr    %r3,%r3                 # int
         jg      sys_s390_runtime_instr
+
+ENTRY(sys_kcmp_wrapper)
+        lgfr    %r2,%r2                 # pid_t
+        lgfr    %r3,%r3                 # pid_t
+        lgfr    %r4,%r4                 # int
+        llgfr   %r5,%r5                 # unsigned long
+        llgfr   %r6,%r6                 # unsigned long
+        jg      sys_kcmp
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 539f0a7701e4..48174850f3b0 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -351,3 +351,4 @@ SYSCALL(sys_setns,sys_setns,sys_setns_wrapper)
 SYSCALL(sys_process_vm_readv,sys_process_vm_readv,compat_sys_process_vm_readv_wrapper) /* 340 */
 SYSCALL(sys_process_vm_writev,sys_process_vm_writev,compat_sys_process_vm_writev_wrapper)
 SYSCALL(sys_ni_syscall,sys_s390_runtime_instr,sys_s390_runtime_instr_wrapper)
+SYSCALL(sys_kcmp,sys_kcmp,sys_kcmp_wrapper)