arm: Introduce asm/vdso/clocksource.h

The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.

Introduce asm/vdso/clocksource.h to contain all the arm64 specific
functions that are suitable for vDSO inclusion.

This header will be required by a future patch that will generalize
vdso/clocksource.h.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@armlinux.org.uk>
Link: https://lkml.kernel.org/r/20200320145351.32292-6-vincenzo.frascino@arm.com

diff --git a/arch/arm/include/asm/clocksource.h b/arch/arm/include/asm/clocksource.h
index 73beb7f..13651c7 100644 (file)
--- a/arch/arm/include/asm/clocksource.h
+++ b/arch/arm/include/asm/clocksource.h
@@ -1,7 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_CLOCKSOURCE_H
 #define _ASM_CLOCKSOURCE_H
 
-#define VDSO_ARCH_CLOCKMODES   \
-       VDSO_CLOCKMODE_ARCHTIMER
+#include <asm/vdso/clocksource.h>
 
-#endif
+#endif /* _ASM_CLOCKSOURCE_H */

diff --git a/arch/arm/include/asm/vdso/clocksource.h b/arch/arm/include/asm/vdso/clocksource.h
new file mode 100644 (file)
index 0000000..50c0b19
--- /dev/null
+++ b/arch/arm/include/asm/vdso/clocksource.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VDSOCLOCKSOURCE_H
+#define __ASM_VDSOCLOCKSOURCE_H
+
+#define VDSO_ARCH_CLOCKMODES   \
+       VDSO_CLOCKMODE_ARCHTIMER
+
+#endif /* __ASM_VDSOCLOCKSOURCE_H */