linux/jiffies.h: Extract common header for vDSO

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.

Split jiffies.h into linux and common headers to make the latter suitable
for inclusion in the vDSO library.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200320145351.32292-14-vincenzo.frascino@arm.com

diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index e3279ef24d2884f3a7db03e01bdd1f9aea1b29d8..fed6ba96c527851cf973ab187645e28fe0fe9107 100644 (file)
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -8,6 +8,7 @@
 #include <linux/types.h>
 #include <linux/time.h>
 #include <linux/timex.h>
+#include <vdso/jiffies.h>
 #include <asm/param.h>                 /* for HZ */
 #include <generated/timeconst.h>
 
@@ -59,9 +60,6 @@
 
 extern int register_refined_jiffies(long clock_tick_rate);
 
-/* TICK_NSEC is the time between ticks in nsec assuming SHIFTED_HZ */
-#define TICK_NSEC ((NSEC_PER_SEC+HZ/2)/HZ)
-
 /* TICK_USEC is the time between ticks in usec assuming SHIFTED_HZ */
 #define TICK_USEC ((USEC_PER_SEC + HZ/2) / HZ)
 

diff --git a/include/vdso/jiffies.h b/include/vdso/jiffies.h
new file mode 100644 (file)
index 0000000..2f9d596
--- /dev/null
+++ b/include/vdso/jiffies.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_JIFFIES_H
+#define __VDSO_JIFFIES_H
+
+#include <asm/param.h>                 /* for HZ */
+#include <vdso/time64.h>
+
+/* TICK_NSEC is the time between ticks in nsec assuming SHIFTED_HZ */
+#define TICK_NSEC ((NSEC_PER_SEC+HZ/2)/HZ)
+
+#endif /* __VDSO_JIFFIES_H */