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timers/nohz: Capitalize 'CPU' consistently
While reviewing another patch I noticed that kernel/time/tick-sched.c
had a charmingly (confusingly, annoyingly) rich set of variants for
spelling 'CPU':
cpu
cpus
CPU
CPUs
per CPU
per-CPU
per cpu
... sometimes these were mixed even within the same comment block!
Compress these variants down to a single consistent set of:
CPU
CPUs
per-CPU
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>