Subject: Re: [PATCH 10/28] mm: only allow page table mappings for built-in zsmalloc

From: Peter Zijlstra <[email-masked]>
Date: Wed, 8 Apr 2020 17:12:03 +0200

On Wed, Apr 08, 2020 at 08:01:00AM -0700, Randy Dunlap wrote:
> Hi,
> 
> On 4/8/20 4:59 AM, Christoph Hellwig wrote:
> > diff --git a/mm/Kconfig b/mm/Kconfig
> > index 36949a9425b8..614cc786b519 100644
> > --- a/mm/Kconfig
> > +++ b/mm/Kconfig
> > @@ -702,7 +702,7 @@ config ZSMALLOC
> >  
> >  config ZSMALLOC_PGTABLE_MAPPING
> >  	bool "Use page table mapping to access object in zsmalloc"
> > -	depends on ZSMALLOC
> > +	depends on ZSMALLOC=y
> 
> It's a bool so this shouldn't matter... not needed.

My mm/Kconfig has:

config ZSMALLOC
	tristate "Memory allocator for compressed pages"
	depends on MMU

which I think means it can be modular, no?