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authorThomas Gleixner <tglx@linutronix.de>2023-04-25 20:49:17 +0200
committerThomas Gleixner <tglx@linutronix.de>2023-06-18 22:41:51 +0200
commit640fe745d7d4b6e47f3b455cb5de99a08c6b6d23 (patch)
tree1658c7dbf951930b803fdb9ac148db46ba8ee88b /kernel/time/posix-timers.c
parent3561fcb402b7ab7fdb4c1746dae4995889506605 (diff)
posix-timers: Document nanosleep() details
The descriptions for common_nsleep() is wrong and common_nsleep_timens() lacks any form of comment. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20230425183313.567072835@linutronix.de
Diffstat (limited to 'kernel/time/posix-timers.c')
-rw-r--r--kernel/time/posix-timers.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 03ef6af1633b..54adb4cfd4f2 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1370,7 +1370,7 @@ SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
#endif
/*
- * nanosleep for monotonic and realtime clocks
+ * sys_clock_nanosleep() for CLOCK_REALTIME and CLOCK_TAI
*/
static int common_nsleep(const clockid_t which_clock, int flags,
const struct timespec64 *rqtp)
@@ -1382,8 +1382,13 @@ static int common_nsleep(const clockid_t which_clock, int flags,
which_clock);
}
+/*
+ * sys_clock_nanosleep() for CLOCK_MONOTONIC and CLOCK_BOOTTIME
+ *
+ * Absolute nanosleeps for these clocks are time-namespace adjusted.
+ */
static int common_nsleep_timens(const clockid_t which_clock, int flags,
- const struct timespec64 *rqtp)
+ const struct timespec64 *rqtp)
{
ktime_t texp = timespec64_to_ktime(*rqtp);