| Message ID | 20180602124408.8430-11-mathieu.desnoyers@efficios.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | None | expand |
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> writes: > From: Boqun Feng <boqun.feng@gmail.com> > > Wire up the rseq system call on powerpc. > > This provides an ABI improving the speed of a user-space getcpu > operation on powerpc by skipping the getcpu system call on the fast > path, as well as improving the speed of user-space operations on per-cpu > data compared to using load-reservation/store-conditional atomics. > > Signed-off-by: Boqun Feng <boqun.feng@gmail.com> > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> > CC: Paul Mackerras <paulus@samba.org> > CC: Michael Ellerman <mpe@ellerman.id.au> > CC: Peter Zijlstra <peterz@infradead.org> > CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> > CC: linuxppc-dev@lists.ozlabs.org > --- > arch/powerpc/include/asm/systbl.h | 1 + > arch/powerpc/include/asm/unistd.h | 2 +- > arch/powerpc/include/uapi/asm/unistd.h | 1 + > 3 files changed, 3 insertions(+), 1 deletion(-) Looks fine to me. I don't have any other new syscalls in my next, so this should not conflict with anything for 4.18. Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) cheers
----- On Jun 5, 2018, at 1:18 AM, Michael Ellerman mpe@ellerman.id.au wrote: > Mathieu Desnoyers <mathieu.desnoyers@efficios.com> writes: > >> From: Boqun Feng <boqun.feng@gmail.com> >> >> Wire up the rseq system call on powerpc. >> >> This provides an ABI improving the speed of a user-space getcpu >> operation on powerpc by skipping the getcpu system call on the fast >> path, as well as improving the speed of user-space operations on per-cpu >> data compared to using load-reservation/store-conditional atomics. >> >> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> >> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> >> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> >> CC: Paul Mackerras <paulus@samba.org> >> CC: Michael Ellerman <mpe@ellerman.id.au> >> CC: Peter Zijlstra <peterz@infradead.org> >> CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> >> CC: linuxppc-dev@lists.ozlabs.org >> --- >> arch/powerpc/include/asm/systbl.h | 1 + >> arch/powerpc/include/asm/unistd.h | 2 +- >> arch/powerpc/include/uapi/asm/unistd.h | 1 + >> 3 files changed, 3 insertions(+), 1 deletion(-) > > Looks fine to me. > > I don't have any other new syscalls in my next, so this should not > conflict with anything for 4.18. > > Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Added your ack to the series, thanks! Mathieu
diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h index d61f9c96d916..45d4d37495fd 100644 --- a/arch/powerpc/include/asm/systbl.h +++ b/arch/powerpc/include/asm/systbl.h @@ -392,3 +392,4 @@ SYSCALL(statx) SYSCALL(pkey_alloc) SYSCALL(pkey_free) SYSCALL(pkey_mprotect) +SYSCALL(rseq) diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index daf1ba97a00c..1e9708632dce 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -12,7 +12,7 @@ #include <uapi/asm/unistd.h> -#define NR_syscalls 387 +#define NR_syscalls 388 #define __NR__exit __NR_exit diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h index 389c36fd8299..ac5ba55066dd 100644 --- a/arch/powerpc/include/uapi/asm/unistd.h +++ b/arch/powerpc/include/uapi/asm/unistd.h @@ -398,5 +398,6 @@ #define __NR_pkey_alloc 384 #define __NR_pkey_free 385 #define __NR_pkey_mprotect 386 +#define __NR_rseq 387 #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */