On Wed, Apr 12, 2017 at 10:07:39PM +0200, Thomas Gleixner wrote: > spu_queue_register() needs to invoke setup functions on a particular > CPU. This is achieved by temporarily setting the affinity of the > calling user space thread to the requested CPU and reset it to the original > affinity afterwards. > > That's racy vs. CPU hotplug and concurrent affinity settings for that > thread resulting in code executing on the wrong CPU and overwriting the > new affinity setting. > > Replace it by using work_on_cpu_safe() which guarantees to run the code on > the requested CPU or to fail in case the CPU is offline. > > Signed-off-by: Thomas Gleixner <t...@linutronix.de> > Cc: Herbert Xu <herb...@gondor.apana.org.au> > Cc: "David S. Miller" <da...@davemloft.net> > Cc: linux-cry...@vger.kernel.org
Acked-by: Herbert Xu <herb...@gondor.apana.org.au> -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
