timers: Clarify usleep_range() function comment

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Update the usleep_range() function comment to make it clear that it can
only be used in non-atomic context.

Previously we claimed usleep_range() was a drop-in replacement for udelay()
where wakeup is flexible.  But that's only true in non-atomic contexts,
where it's possible to sleep instead of delay.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20160531212302.28502.44995.stgit@bhelgaas-glaptop2.roam.corp.google.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Bjorn Helgaas 2016-05-31 16:23:02 -05:00 • committed by Thomas Gleixner

parent 2895a5e5b3

commit b5227d03b7

1 changed files with 7 additions and 1 deletions

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kernel/time/timer.c

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