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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-01-05 15:29:38 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-01-11 15:01:24 +0300 |
| commit | 249c543b97e1409b13fb9539b2f880e58ddd87cf (patch) | |
| tree | 956a0719238b56b8dffa3877d3fe3eb5c27df9f4 /arch/s390/kernel/vdso64/vdso64.lds.S | |
| parent | 0dab3e0e59ac3692e2f95cb37ba17d5dfb3d1e5f (diff) | |
| download | linux-249c543b97e1409b13fb9539b2f880e58ddd87cf.tar.xz | |
s390/vdso: optimize getcpu system call
Add the CPU number to the per-cpu vdso data page and add the
__kernel_getcpu function to the vdso object to retrieve the
CPU number in user space.
Suggested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vdso64/vdso64.lds.S')
| -rw-r--r-- | arch/s390/kernel/vdso64/vdso64.lds.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/vdso64/vdso64.lds.S b/arch/s390/kernel/vdso64/vdso64.lds.S index 9f5979d102a9..f35455d497fe 100644 --- a/arch/s390/kernel/vdso64/vdso64.lds.S +++ b/arch/s390/kernel/vdso64/vdso64.lds.S @@ -132,6 +132,7 @@ VERSION __kernel_gettimeofday; __kernel_clock_gettime; __kernel_clock_getres; + __kernel_getcpu; local: *; }; |