On Thu, 2015-08-10 at 00:04:26 UTC, Cyril Bur wrote: > native_hpte_clear() is called in real mode from two places: > - Early in boot during htab initialisation if firmware assisted dump is > active. > - Late in the kexec path. > > In both contexts there is no need to disable interrupts are they are > already disabled. Furthermore, locking around the tlbie() is only required > for pre POWER5 hardware. > > On POWER5 or newer hardware concurrent tlbie()s work as expected and on pre > POWER5 hardware concurrent tlbie()s could result in deadlock. This code > would only be executed at crashdump time, during which all bets are off, > concurrent tlbie()s are unlikely and taking locks is unsafe therefore the > best course of action is to simply do nothing. Concurrent tlbie()s are not > possible in the first case as secondary CPUs have not come up yet. > > Signed-off-by: Cyril Bur <cyril...@gmail.com>
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/fdf880a60835cd1dec256346 cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
