posix-timers.h states that a clockid_t value is invalid if bits 0, 1 and
2 are all set. Add a mask that can be safely used elsewhere even if this
implicit rule's implementation is changed.
This is done in preparation for the upcoming time based transmission
patchset.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palen...@intel.com>
---
include/linux/posix-timers.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index c85704fcdbd2..0ba677cc8da6 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -28,6 +28,7 @@ struct cpu_timer_list {
*
* A clockid is invalid if bits 2, 1, and 0 are all set.
*/
+#define CLOCKID_INVALID GENMASK(2, 0)
#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
#define CPUCLOCK_PERTHREAD(clock) \
(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
--
2.16.2
