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authorArnd Bergmann <arnd@arndb.de>2018-04-27 16:40:15 +0300
committerThomas Gleixner <tglx@linutronix.de>2018-05-19 14:57:32 +0300
commitb9ff604cff1135cc576cf952d394ed9401aa234b (patch)
tree2987c08c1e0deb9063d4157a9c51afd0155241de /include/linux/timekeeping.h
parentfb7fcc96a86cfaef0f6dcc0665516aa68611e736 (diff)
downloadlinux-b9ff604cff1135cc576cf952d394ed9401aa234b.tar.xz
timekeeping: Add ktime_get_coarse_with_offset
I have run into a couple of drivers using current_kernel_time() suffering from the y2038 problem, and they could be converted to using ktime_t, but don't have interfaces that skip the nanosecond calculation at the moment. This introduces ktime_get_coarse_with_offset() as a simpler variant of ktime_get_with_offset(), and adds wrappers for the three time domains we support with the existing function. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Stephen Boyd <sboyd@kernel.org> Cc: y2038@lists.linaro.org Cc: John Stultz <john.stultz@linaro.org> Link: https://lkml.kernel.org/r/20180427134016.2525989-5-arnd@arndb.de
Diffstat (limited to 'include/linux/timekeeping.h')
-rw-r--r--include/linux/timekeeping.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 3ef9791d7d75..42f71f4b658a 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -51,6 +51,7 @@ enum tk_offsets {
extern ktime_t ktime_get(void);
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
+extern ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs);
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
extern ktime_t ktime_get_raw(void);
extern u32 ktime_get_resolution_ns(void);
@@ -63,6 +64,11 @@ static inline ktime_t ktime_get_real(void)
return ktime_get_with_offset(TK_OFFS_REAL);
}
+static inline ktime_t ktime_get_coarse_real(void)
+{
+ return ktime_get_coarse_with_offset(TK_OFFS_REAL);
+}
+
/**
* ktime_get_boottime - Returns monotonic time since boot in ktime_t format
*
@@ -74,6 +80,11 @@ static inline ktime_t ktime_get_boottime(void)
return ktime_get_with_offset(TK_OFFS_BOOT);
}
+static inline ktime_t ktime_get_coarse_boottime(void)
+{
+ return ktime_get_coarse_with_offset(TK_OFFS_BOOT);
+}
+
/**
* ktime_get_clocktai - Returns the TAI time of day in ktime_t format
*/
@@ -82,6 +93,11 @@ static inline ktime_t ktime_get_clocktai(void)
return ktime_get_with_offset(TK_OFFS_TAI);
}
+static inline ktime_t ktime_get_coarse_clocktai(void)
+{
+ return ktime_get_coarse_with_offset(TK_OFFS_TAI);
+}
+
/**
* ktime_mono_to_real - Convert monotonic time to clock realtime
*/