On Wed, Aug 21, 2019 at 09:09:19PM +0200, Thomas Gleixner wrote: > Deactivation of the expiry cache is done by setting all clock caches to > 0. That requires to have a check for zero in all places which update the > expiry cache: > > if (cache == 0 || new < cache) > cache = new; > > Use U64_MAX as the deactivated value, which allows to remove the zero > checks when updating the cache and reduces it to the obvious check: > > if (new < cache) > cache = new; > > This also removes the weird workaround in do_prlimit() which was required > to convert a RLIMIT_CPU value of 0 (immediate expiry) to 1 because handing > in 0 to the posix CPU timer code would have effectively disarmed it. > > Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Reviewed-by: Frederic Weisbecker <frede...@kernel.org>
