timer: add fsleep for flexible sleeping
authorHeiner Kallweit <hkallweit1@gmail.com>
Fri, 1 May 2020 21:27:21 +0000 (23:27 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 7 May 2020 00:03:34 +0000 (17:03 -0700)
commitc6af13d334759c33c14b6fad4c676c6d1dbf9564
tree7ec9292a89a88376a78f4ad035dc9986d1dcad7e
parent969c54646af0d7d94a5f0f37adbbfe024e85466e
timer: add fsleep for flexible sleeping

Sleeping for a certain amount of time requires use of different
functions, depending on the time period.
Documentation/timers/timers-howto.rst explains when to use which
function, and also checkpatch checks for some potentially
problematic cases.

So let's create a helper that automatically chooses the appropriate
sleep function -> fsleep(), for flexible sleeping

If the delay is a constant, then the compiler should be able to ensure
that the new helper doesn't create overhead. If the delay is not
constant, then the new helper can save some code.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Documentation/timers/timers-howto.rst
include/linux/delay.h