tree 6b7ca77d0d8ff1048e01b5dd26d364e4c0512fa5
parent 602b55e48f2b2c09788169ee7cb6ddcc66bfa4e8
author Clark Williams <williams@redhat.com> 1312080953 -0500
committer Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1748328435 +0200

sysfs: Add /sys/kernel/realtime entry

Add a /sys/kernel entry to indicate that the kernel is a
realtime kernel.

Clark says that he needs this for udev rules, udev needs to evaluate
if its a PREEMPT_RT kernel a few thousand times and parsing uname
output is too slow or so.

Are there better solutions? Should it exist and return 0 on !-rt?

Signed-off-by: Clark Williams <williams@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>