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authorVincenzo Frascino <vincenzo.frascino@arm.com>2020-03-20 17:53:38 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-03-21 17:23:58 +0300
commit97b01d2eabd8c0fa650a9d513febeae35dbc6de4 (patch)
tree47b32f208bd877fc059978f956167fd03611bab4 /include/vdso
parentb72a9c5e023bf405e62b858eb5384eb34e2b7a74 (diff)
downloadlinux-97b01d2eabd8c0fa650a9d513febeae35dbc6de4.tar.xz
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
Diffstat (limited to 'include/vdso')
-rw-r--r--include/vdso/jiffies.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/vdso/jiffies.h b/include/vdso/jiffies.h
new file mode 100644
index 000000000000..2f9d596c8b29
--- /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 */