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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:10 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:10 +0200
commit7648b1330c335601b7c09c25f77a03cda128fcab (patch)
tree8b92b501dc746b135bf9019472b425e8ef052714 /arch/x86/vdso/vextern.h
parent185f3d38900f750a4566f87cde6a178f3595a115 (diff)
x86_64: move vdso
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/vdso/vextern.h')
-rw-r--r--arch/x86/vdso/vextern.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/vdso/vextern.h b/arch/x86/vdso/vextern.h
new file mode 100644
index 00000000000..1683ba2ae3e
--- /dev/null
+++ b/arch/x86/vdso/vextern.h
@@ -0,0 +1,16 @@
+#ifndef VEXTERN
+#include <asm/vsyscall.h>
+#define VEXTERN(x) \
+ extern typeof(x) *vdso_ ## x __attribute__((visibility("hidden")));
+#endif
+
+#define VMAGIC 0xfeedbabeabcdefabUL
+
+/* Any kernel variables used in the vDSO must be exported in the main
+ kernel's vmlinux.lds.S/vsyscall.h/proper __section and
+ put into vextern.h and be referenced as a pointer with vdso prefix.
+ The main kernel later fills in the values. */
+
+VEXTERN(jiffies)
+VEXTERN(vgetcpu_mode)
+VEXTERN(vsyscall_gtod_data)