On Thu, Jan 10, 2019 at 05:24:35PM +0100, Arnd Bergmann wrote: > Most architectures define system call numbers for the rseq and pkey system > calls, even when they don't support the features, and perhaps never will. > > Only a few architectures are missing these, so just define them anyway > for consistency. If we decide to add them later to one of these, the > system call numbers won't get out of sync then. > > Signed-off-by: Arnd Bergmann <a...@arndb.de> > diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h > index a1fbf15d53aa..ed08f114ee91 100644 > --- a/arch/s390/include/asm/unistd.h > +++ b/arch/s390/include/asm/unistd.h > @@ -11,9 +11,6 @@ > #include <asm/unistd_nr.h> > > #define __IGNORE_time > -#define __IGNORE_pkey_mprotect > -#define __IGNORE_pkey_alloc > -#define __IGNORE_pkey_free > > #define __ARCH_WANT_NEW_STAT > #define __ARCH_WANT_OLD_READDIR > diff --git a/arch/s390/kernel/syscalls/syscall.tbl > b/arch/s390/kernel/syscalls/syscall.tbl > index 428cf512a757..f84ea364a302 100644 > --- a/arch/s390/kernel/syscalls/syscall.tbl > +++ b/arch/s390/kernel/syscalls/syscall.tbl > @@ -391,6 +391,9 @@ > 381 common kexec_file_load sys_kexec_file_load > compat_sys_kexec_file_load > 382 common io_pgetevents sys_io_pgetevents > compat_sys_io_pgetevents > 383 common rseq sys_rseq > compat_sys_rseq > +384 common pkey_alloc sys_pkey_alloc > sys_pkey_alloc > +385 common pkey_free sys_pkey_free > sys_pkey_free > +386 common pkey_mprotect sys_pkey_mprotect > sys_pkey_mprotect
Since you only need/want the system call numbers, could you please change these lines to: > +384 common pkey_alloc - - > +385 common pkey_free - - > +386 common pkey_mprotect - - Otherwise it _looks_ like we would need compat wrappers here as well, even though all of them would just jump to sys_ni_syscall() in this case. Making this explicit seems to better.
