On Wed, Jul 21, 2021 at 09:11:30PM +0200, Thomas Gleixner wrote: > Nothing enforces the posted writes to be visible when the function > returns. Flush them even if the flush might be redundant when the entry is > masked already as the unmask will flush as well. This is either setup or a > rare affinity change event so the extra flush is not the end of the world. > > While this is more a theoretical issue especially the X86 MSI affinity > stter mechanism relies on the assumption that the update has reached the stter? > hardware when the function returns. > > Again, as this never has been enfocred the Fixes tag refers to a commit in: s/enfocred/enforced/ > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
