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authorAndy Lutomirski <luto@mit.edu>2011-08-10 19:15:31 +0400
committerH. Peter Anvin <hpa@linux.intel.com>2011-08-11 04:26:46 +0400
commitfce8dc06423d6fb2709469dc5c55b04e09c1d126 (patch)
treeb6a901db2c89a140adfbe09cc0547fb232f9b270
parentf3fb5b7bb70d6e679c15fef85707810a067f5fb6 (diff)
downloadlinux-fce8dc06423d6fb2709469dc5c55b04e09c1d126.tar.xz
x86-64: Wire up getcpu syscall
getcpu is available as a vdso entry and an emulated vsyscall. Programs that for some reason don't want to use the vdso should still be able to call getcpu without relying on the slow emulated vsyscall. It costs almost nothing to expose it as a real syscall. We also need this for the following patch in vsyscall=native mode. Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/6b19f55bdb06a0c32c2fa6dba9b6f222e1fde999.1312988155.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
-rw-r--r--arch/x86/include/asm/unistd_64.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h
index 705bf139288c..d92641cc7acc 100644
--- a/arch/x86/include/asm/unistd_64.h
+++ b/arch/x86/include/asm/unistd_64.h
@@ -681,6 +681,8 @@ __SYSCALL(__NR_syncfs, sys_syncfs)
__SYSCALL(__NR_sendmmsg, sys_sendmmsg)
#define __NR_setns 308
__SYSCALL(__NR_setns, sys_setns)
+#define __NR_getcpu 309
+__SYSCALL(__NR_getcpu, sys_getcpu)
#ifndef __NO_STUBS
#define __ARCH_WANT_OLD_READDIR