x86/tsc: Use seqcount_latch_t

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Latch sequence counters have unique read and write APIs, and thus
seqcount_latch_t was recently introduced at seqlock.h.

Use that new data type instead of plain seqcount_t. This adds the
necessary type-safety and ensures that only latching-safe seqcount APIs
are to be used.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
[peterz: unwreck cyc2ns_read_begin()]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200827114044.11173-7-a.darwish@linutronix.de

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Ahmed S. Darwish 2020-08-27 13:40:42 +02:00 • committed by Peter Zijlstra

parent 249d053835

commit a1f1066133

1 changed files with 5 additions and 5 deletions

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arch/x86/kernel/tsc.c

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