On Wed, Jul 8, 2015 at 8:46 AM, Heiko Carstens
[off-list ref] wrote:

quoted

diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 1acad02..f6d81d6 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S

@@ -363,3 +363,6 @@ SYSCALL(sys_bpf,compat_sys_bpf)
 SYSCALL(sys_s390_pci_mmio_write,compat_sys_s390_pci_mmio_write)
 SYSCALL(sys_s390_pci_mmio_read,compat_sys_s390_pci_mmio_read)
 SYSCALL(sys_execveat,compat_sys_execveat)
+SYSCALL(sys_mlock2,compat_sys_mlock2)                        /* 355 */
+SYSCALL(sys_munlock2,compat_sys_munlock2)
+SYSCALL(sys_munlockall2,compat_sys_munlockall2)

FWIW, you would also need to add matching lines to the two files

arch/s390/include/uapi/asm/unistd.h
arch/s390/kernel/compat_wrapper.c

so that the system call would be wired up on s390.

Similar comment for m68k:

arch/m68k/include/asm/unistd.h
arch/m68k/include/uapi/asm/unistd.h

I think you best look at the last commits that added system calls, for all
architectures, to make sure you don't do partial updates.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds