On 10/06/2017 04:27 AM, Arnd Bergmann wrote:
On Fri, Oct 6, 2017 at 12:03 PM, Olof's autobuilder build@lixom.net wrote:
Here are the build results from automated periodic testing.
The tree being built was stable-rc, found at:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git/
Topmost commit:
0e59436 Linux 4.9.54-rc1
arm64.allmodconfig:/work/build/batch/arch/arm64/mm/kasan_init.c:156:95: error: implicit declaration of function 'lm_alias'; did you mean 'mm_alloc'? [-Werror=implicit-function-declaration]
Caused by
e773d137b255 ("arm64: kasan: avoid bad virt_to_pfn()") (backported from b0de0ccc8b9ed)
Presumably requires a backport of
568c5fe5a54f ("mm: Introduce lm_alias")
Mark or Laura, can you confirm that this is the correct fix? I see additional uses of lm_alias in mainline, but only this one backported to stable, not sure if only this one is required there, or we want the others as well.
Arnd
I don't think backporting lm_alias is the correct fix. That was introduced as part of DEBUG_VIRTUAL for arm64 which isn't present at all for 4.9. If DEBUG_VIRTUAL isn't present, there should be no need for this fix since it's handled by existing code. I think the patch should be dropped assuming there isn't another issue with kasan.
Thanks, Laura