Commit da21c5a5 authored Dec 21, 2017 by Anna-Maria Gleixner Committed by Ingo Molnar Jan 16, 2018

hrtimer: Make room in 'struct hrtimer_cpu_base'



The upcoming softirq based hrtimers support requires an additional field in
the hrtimer_cpu_base struct, which would grow the struct size beyond a
cache line.

The hrtimer_cpu_base::nr_retries and ::nr_hangs members are solely
used for diagnostic output and have no requirement to be 'unsigned int'.

Make them 'unsigned short' to create room for the new struct member.

No functional change.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: keescook@chromium.org
Link: http://lkml.kernel.org/r/20171221104205.7269-13-anna-maria@linutronix.de


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 3f0b9e8e

include/linux/hrtimer.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -189,8 +189,8 @@ struct hrtimer_cpu_base {
		ktime_t expires_next;
		struct hrtimer *next_timer;
		unsigned int nr_events;
		unsigned int nr_retries;
		unsigned int nr_hangs;
		unsigned short nr_retries;
		unsigned short nr_hangs;
		unsigned int max_hang_time;
		#endif
		struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];

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