From d5e0b9bd6e296f3ec5263fa296d39f3fed9b8fa2 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Wed, 9 Jan 2013 20:30:11 -0600 Subject: PowerPC: Change sched_getcpu to use vDSO getcpu instead of syscall. --- sysdeps/unix/sysv/linux/powerpc/Versions | 1 + sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h | 2 ++ sysdeps/unix/sysv/linux/powerpc/init-first.c | 3 +++ sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c | 30 ++++++++++++++++++++++++ 4 files changed, 36 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c (limited to 'sysdeps/unix/sysv/linux/powerpc') diff --git a/sysdeps/unix/sysv/linux/powerpc/Versions b/sysdeps/unix/sysv/linux/powerpc/Versions index 1ef53b9e9c..396a4236c1 100644 --- a/sysdeps/unix/sysv/linux/powerpc/Versions +++ b/sysdeps/unix/sysv/linux/powerpc/Versions @@ -3,5 +3,6 @@ libc { __vdso_get_tbfreq; __vdso_clock_gettime; __vdso_clock_getres; + __vdso_getcpu; } } diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h b/sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h index 6f79841ce5..545fda462a 100644 --- a/sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h +++ b/sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h @@ -30,6 +30,8 @@ extern void *__vdso_clock_getres; extern void *__vdso_get_tbfreq; +extern void *__vdso_getcpu; + #endif #endif /* _LIBC_VDSO_H */ diff --git a/sysdeps/unix/sysv/linux/powerpc/init-first.c b/sysdeps/unix/sysv/linux/powerpc/init-first.c index 5202e7d2f1..195d0303be 100644 --- a/sysdeps/unix/sysv/linux/powerpc/init-first.c +++ b/sysdeps/unix/sysv/linux/powerpc/init-first.c @@ -27,6 +27,7 @@ void *__vdso_gettimeofday attribute_hidden; void *__vdso_clock_gettime; void *__vdso_clock_getres; void *__vdso_get_tbfreq; +void *__vdso_getcpu; static inline void @@ -41,6 +42,8 @@ _libc_vdso_platform_setup (void) __vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615); __vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_vdso_get_tbfreq", &linux2615); + + __vdso_getcpu = _dl_vdso_vsym ("__kernel_getcpu", &linux2615); } # define VDSO_SETUP _libc_vdso_platform_setup diff --git a/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c b/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c new file mode 100644 index 0000000000..617e6f121f --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c @@ -0,0 +1,30 @@ +/* Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include + + +int +sched_getcpu (void) +{ + unsigned int cpu; + int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL); + + return r == -1 ? r : cpu; +} -- cgit v1.2.1