On Sun, 9 Jun 2013, Chen Gang wrote:
> After finish the internal 'while', need not test TASKLET_STATE_SCHED
> again, so looping back to outside 'while' is only for set_bit().
>
> When use 'if' and set_bit() instead of 'while', it will save at least
> one running conditional instruction, and also will be clearer for readers
> (although the binary size will be a little bigger).
And by doing that you break the atomicity of test_and_set_bit. There
is a good reason why this is an atomic operation and why the code is
written as is.
> The related patch is "1da177e Linux-2.6.12-rc2"
How is that patch related to the problem?
Thanks
tglx
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