linux-kernel - Re: [PATCH 6/8] x86/dump_pagetables: Add support 5-level paging

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Message-ID: <20170328093946.GA30567@gmail.com>
Date:   Tue, 28 Mar 2017 11:39:46 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...capital.net>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/8] x86/dump_pagetables: Add support 5-level paging


* Kirill A. Shutemov <kirill@...temov.name> wrote:

> On Tue, Mar 28, 2017 at 08:12:59AM +0200, Ingo Molnar wrote:
> > 
> > * Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> wrote:
> > 
> > > +#if PTRS_PER_P4D > 1
> > > +
> > > +static void walk_p4d_level(struct seq_file *m, struct pg_state *st, pgd_t addr,
> > > +							unsigned long P)
> > 
> > Pretty ugly line break. Either don't break the line, or break it in a more logical 
> > place, like:
> > 
> > static void
> > walk_p4d_level(struct seq_file *m, struct pg_state *st, pgd_t addr, unsigned long P)
> > 
> > > +	start = (p4d_t *) pgd_page_vaddr(addr);
> > 
> > The space between the type cast and the function invocation is not needed.
> 
> Both style issues you have pointed to are inherited from handling of other
> page table levels.
> 
> Do you want me to adjust them too?

Yes, pre-existing uncleanlinesses are not a reason to replicate them going 
forward. Feel free to do it in a separate preparatory patch if the noise
is too large.

Thanks,

	Ingo