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PowerPC: Change sched_getcpu to use vDSO getcpu instead of syscall.

This commit is contained in:
Anton Blanchard 2013-01-09 20:30:11 -06:00 committed by Ryan S. Arnold
parent 0c07e3eaa7
commit d5e0b9bd6e
5 changed files with 43 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2013-01-09 Anton Blanchard <anton@samba.org>
* sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c: New file.
* sysdeps/unix/sysv/linux/powerpc/Versions: Add __vdso_getcpu.
* sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/init-first.c: Likewise.
2013-01-09 Joseph Myers <joseph@codesourcery.com>
* include/features.h (__USE_ANSI): Remove.

1
sysdeps/unix/sysv/linux/powerpc/Versions
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@ -3,5 +3,6 @@ libc {
__vdso_get_tbfreq;
__vdso_clock_gettime;
__vdso_clock_getres;
__vdso_getcpu;
}
}

2
sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h
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@ -30,6 +30,8 @@ extern void *__vdso_clock_getres;
extern void *__vdso_get_tbfreq;
extern void *__vdso_getcpu;
#endif
#endif /* _LIBC_VDSO_H */

3
sysdeps/unix/sysv/linux/powerpc/init-first.c
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@ -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

30
sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c Normal file
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@ -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
<http://www.gnu.org/licenses/>. */
#include <sched.h>
#include <sysdep.h>
#include <bits/libc-vdso.h>
int
sched_getcpu (void)
{
unsigned int cpu;
int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL);
return r == -1 ? r : cpu;
}