On Sun, Mar 04, 2012 at 11:32:50PM +0000, Tabi Timur-B04825 wrote: > Russell King - ARM Linux wrote: > > Is the SCR shared between capture and playback? In that case, what > > makes this read-modify-write thread safe? > > What's "SCR"? I assumed you knew the code you were commenting on. clrbits32(&ssi->scr, CCSR_SSI_SCR_SSIEN); The register these functions seem to be used on appears to be called 'SCR'. > It's not thread-safe on PPC, but then neither is the entire function. You > can't have two threads attempt to initialize the hardware at the same > time. Why do you say "can't" - what prevents it? If nothing, then this stuff is buggy when preempt is enabled, or you're running on SMP. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm-kernel