[08/19] linux/jiffies.h: Extract common header for vDSO

Commit Message

Vincenzo Frascino Feb. 13, 2020, 4:16 p.m. UTC

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 <[e-mail]>
---
 include/common/jiffies.h | 11 +++++++++++
 include/linux/jiffies.h  |  4 +---
 2 files changed, 12 insertions(+), 3 deletions(-)
 create mode 100644 include/common/jiffies.h

Patch

diff --git a/include/common/jiffies.h b/include/common/jiffies.h
new file mode 100644
index 000000000000..ff0207f00550
--- /dev/null
+++ b/include/common/jiffies.h
@@ -0,0 +1,11 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __COMMON_JIFFIES_H
+#define __COMMON_JIFFIES_H
+
+#include <asm/param.h>			/* for HZ */
+#include <common/time64.h>
+
+/* TICK_NSEC is the time between ticks in nsec assuming SHIFTED_HZ */
+#define TICK_NSEC ((NSEC_PER_SEC+HZ/2)/HZ)
+
+#endif /* __COMMON_JIFFIES_H */
diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index e3279ef24d28..710539d1e39b 100644
--- 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 <common/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)