Re: [PATCH v2 11/11] kasan: rework Kconfig settings

On Fri, Jun 16, 2017 at 1:42 PM, Arnd Bergmann [off-list ref] wrote:

quoted

quoted

diff --git a/lib/Kconfig.kmemcheck b/lib/Kconfig.kmemcheck
index 846e039a86b4..58b9f3f81dc8 100644
--- a/lib/Kconfig.kmemcheck
+++ b/lib/Kconfig.kmemcheck

@@ -7,6 +7,7 @@ menuconfig KMEMCHECK
        bool "kmemcheck: trap use of uninitialized memory"
        depends on DEBUG_KERNEL
        depends on !X86_USE_3DNOW
+       depends on !KASAN_EXTRA

KASAN is not meant to work with KMEMCHECK. I am not sure if it even
works, and it's definitely unmaintained. Even if it works now, I am
not sure what could be the intention of somebody running that
combination.
So I think we should do: depends on !KASAN
Will it make things simper for you?

I don't think it will change anything for me, other than having to respin the
patch series or adding a patch on top.

I have just checked that KMEMCHECK is already disabled in allmodconfig,
and all but one of the warnings I address in the series show up in
allmodconfig too.

Ack.

We can disable it if/when KASAN+KMEMCHECK combination requires any
additional work, or causes user confusion.