sched/wait: Introduce a wait_on_bit_timeout() helper function

[Johan Hedberg]

Hi,

We'd need this helper function for the btusb driver for waiting for
certain firmware loading stages which are indicated through a bit-field.
For now we made a local copy in btusb [1] with the intention to switch to
this global version as soon as it makes it upstream. If it's ok we can
also take the patch through the bluetooth-next tree and get it from
there upstream.

Johan

[1] http://marc.info/?l=linux-bluetooth&m=142260834526228&w=2

----------------------------------------------------------------
Johan Hedberg (1):
      sched/wait: Introduce wait_on_bit_timeout()

 include/linux/wait.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

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