Re: [PATCH] powerpc/32s: Handle PROTFAULT in hash_page() also for CONFIG_PPC_KUAP

[Michael Ellerman]

On Mon, 16 Nov 2020 16:09:31 +0000 (UTC), Christophe Leroy wrote:
> On hash 32 bits, handling minor protection faults like unsetting
> dirty flag is heavy if done from the normal page_fault processing,
> because it implies hash table software lookup for flushing the entry
> and then a DSI is taken anyway to add the entry back.
> 
> When KUAP was implemented, as explained in commit a68c31fc01ef
> ("powerpc/32s: Implement Kernel Userspace Access Protection"),
> protection faults has been diverted from hash_page() because
> hash_page() was not able to identify a KUAP fault.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/32s: Handle PROTFAULT in hash_page() also for CONFIG_PPC_KUAP
      https://git.kernel.org/powerpc/c/1b03e71ff6f2bd10b45a0128ce76e0e42014a44c

cheers