linux-kernel - Re: [PATCH] mm: Remove mmu_gathers storage from remaining architectures

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Message-ID: <Yf8+T8Ow7n+38w2H@antec>
Date:   Sun, 6 Feb 2022 12:19:43 +0900
From:   Stafford Horne <shorne@...il.com>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Brian Cain <bcain@...eaurora.org>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Christophe Leroy <christophe.leroy@....fr>,
        linux-hexagon@...r.kernel.org, openrisc@...ts.librecores.org
Subject: Re: [PATCH] mm: Remove mmu_gathers storage from remaining
 architectures

On Sat, Feb 05, 2022 at 05:16:06PM +0200, Mike Rapoport wrote:
> On Sat, Feb 05, 2022 at 11:19:53PM +0900, Stafford Horne wrote:
> > Originally the mmu_gathers were removed in commit 1c3951769621 ("mm: now
> > that all old mmu_gather code is gone, remove the storage").  However,
> > the openrisc and hexagon architecture were merged around the same time
> > and mmu_gathers was not removed.
> > 
> > This patch removes them from openrisc, hexagon and nds32:
> > 
> > Noticed while cleaning this warning:
> > 
> >     arch/openrisc/mm/init.c:41:1: warning: symbol 'mmu_gathers' was not declared. Should it be static?
> > 
> > Signed-off-by: Stafford Horne <shorne@...il.com>
> 
> Acked-by: Mike Rapoport <rppt@...ux.ibm.com>

Thank you,

BTW For now my plan is to queue this on my openrisc branch unless someone else
wants to pick this up.

-Stafford

> > ---
> >  arch/hexagon/mm/init.c  | 2 --
> >  arch/nds32/mm/init.c    | 1 -
> >  arch/openrisc/mm/init.c | 2 --
> >  3 files changed, 5 deletions(-)
> > 
> > diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c
> > index f01e91e10d95..3167a3b5c97b 100644
> > --- a/arch/hexagon/mm/init.c
> > +++ b/arch/hexagon/mm/init.c
> > @@ -29,8 +29,6 @@ int max_kernel_seg = 0x303;
> >  /*  indicate pfn's of high memory  */
> >  unsigned long highstart_pfn, highend_pfn;
> >  
> > -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
> > -
> >  /* Default cache attribute for newly created page tables */
> >  unsigned long _dflt_cache_att = CACHEDEF;
> >  
> > diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c
> > index f63f839738c4..825c85cab1a1 100644
> > --- a/arch/nds32/mm/init.c
> > +++ b/arch/nds32/mm/init.c
> > @@ -18,7 +18,6 @@
> >  #include <asm/tlb.h>
> >  #include <asm/page.h>
> >  
> > -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
> >  DEFINE_SPINLOCK(anon_alias_lock);
> >  extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
> >  
> > diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
> > index 97305bde1b16..3a021ab6f1ae 100644
> > --- a/arch/openrisc/mm/init.c
> > +++ b/arch/openrisc/mm/init.c
> > @@ -38,8 +38,6 @@
> >  
> >  int mem_init_done;
> >  
> > -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
> > -
> >  static void __init zone_sizes_init(void)
> >  {
> >  	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
> > -- 
> > 2.31.1
> > 
> 
> -- 
> Sincerely yours,
> Mike.