----- On Jul 27, 2016, at 11:05 AM, Boqun Feng boqun.feng@xxxxxxxxx wrote: > 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. Picked up in my dev branch too, thanks! Mathieu > > Signed-off-by: Boqun Feng <boqun.feng@xxxxxxxxx> > --- > 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(-) > > diff --git a/arch/powerpc/include/asm/systbl.h > b/arch/powerpc/include/asm/systbl.h > index 2fc5d4db503c..c68f4d0d00b2 100644 > --- a/arch/powerpc/include/asm/systbl.h > +++ b/arch/powerpc/include/asm/systbl.h > @@ -386,3 +386,4 @@ SYSCALL(mlock2) > SYSCALL(copy_file_range) > COMPAT_SYS_SPU(preadv2) > COMPAT_SYS_SPU(pwritev2) > +SYSCALL(rseq) > diff --git a/arch/powerpc/include/asm/unistd.h > b/arch/powerpc/include/asm/unistd.h > index cf12c580f6b2..a01e97d3f305 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 382 > +#define NR_syscalls 383 > > #define __NR__exit __NR_exit > > diff --git a/arch/powerpc/include/uapi/asm/unistd.h > b/arch/powerpc/include/uapi/asm/unistd.h > index e9f5f41aa55a..d1849d64c8ef 100644 > --- a/arch/powerpc/include/uapi/asm/unistd.h > +++ b/arch/powerpc/include/uapi/asm/unistd.h > @@ -392,5 +392,6 @@ > #define __NR_copy_file_range 379 > #define __NR_preadv2 380 > #define __NR_pwritev2 381 > +#define __NR_rseq 382 > > #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */ > -- > 2.9.0 -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
