linux-kernel - Re: [PATCH -next] arm64/mm/dump: fix a compilation error

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Message-ID: <20200110160734.GA25891@willie-the-truck>
Date:   Fri, 10 Jan 2020 16:07:34 +0000
From:   Will Deacon <will@...nel.org>
To:     Steven Price <steven.price@....com>
Cc:     Qian Cai <cai@....pw>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        Catalin Marinas <Catalin.Marinas@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>
Subject: Re: [PATCH -next] arm64/mm/dump: fix a compilation error

On Fri, Jan 10, 2020 at 03:34:48PM +0000, Steven Price wrote:
> On Fri, Jan 10, 2020 at 02:51:12PM +0000, Qian Cai wrote:
> > The linux-next commit "x86: mm: avoid allocating struct mm_struct on the
> > stack" [1] introduced a compilation error with "arm64: mm: convert
> > mm/dump.c to use walk_page_range()" [2]. Fixed it by using the new API.
> > 
> > arch/arm64/mm/dump.c:326:38: error: too few arguments to function call,
> > expected 3, have 2
> >         ptdump_walk_pgd(&st.ptdump, info->mm);
> >         ~~~~~~~~~~~~~~~                     ^
> > ./include/linux/ptdump.h:20:1: note: 'ptdump_walk_pgd' declared here
> > void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm,
> > pgd_t *pgd);
> > ^
> > arch/arm64/mm/dump.c:364:38: error: too few arguments to function call,
> > expected 3, have 2
> >         ptdump_walk_pgd(&st.ptdump, &init_mm);
> >         ~~~~~~~~~~~~~~~                     ^
> > ./include/linux/ptdump.h:20:1: note: 'ptdump_walk_pgd' declared here
> > void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm,
> > pgd_t *pgd);
> > ^
> > 2 errors generated.
> > 
> > [1] http://lkml.kernel.org/r/20200108145710.34314-1-steven.price@arm.com
> 
> Actually this was in the patch I originally posted - somehow it got
> lost when Andrew picked it up.
> 
> > [2] http://lkml.kernel.org/r/20191218162402.45610-22-steven.price@arm.com
> > 
> > Signed-off-by: Qian Cai <cai@....pw>
> 
> Since this matches what I originally wrote... ;)
> 
> Reviewed-by: Steven Price <steven.price@....com>

Acked-by: Will Deacon <will@...nel.org>

I'm assuming Andrew will queue this alongside the others.

Thanks,

Will