Re: [PATCH] scs: add CONFIG_MMU dependency for vfree_atomic()

[Christoph Hellwig]

On Mon, Jan 22, 2024 at 09:52:01AM -0800, Samuel Holland wrote:
> The shadow call stack implementation fails to build without CONFIG_MMU:
> 
>   ld.lld: error: undefined symbol: vfree_atomic
>   >>> referenced by scs.c
>   >>>               kernel/scs.o:(scs_free) in archive vmlinux.a

Well, please just provide vfree_atomic for nommu then.  vfree maps
to kfree which can be called from atomic context, so vfree_atomic
can do the same.