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| author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2020-03-20 14:53:38 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-21 15:23:58 +0100 |
| commit | 97b01d2eabd8c0fa650a9d513febeae35dbc6de4 (patch) | |
| tree | 47b32f208bd877fc059978f956167fd03611bab4 /include/vdso | |
| parent | b72a9c5e023bf405e62b858eb5384eb34e2b7a74 (diff) | |
| download | linux-97b01d2eabd8c0fa650a9d513febeae35dbc6de4.tar.gz linux-97b01d2eabd8c0fa650a9d513febeae35dbc6de4.tar.bz2 linux-97b01d2eabd8c0fa650a9d513febeae35dbc6de4.zip | |
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.h | 11 |
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 */ |