linux-kernel - Re: [RFC PATCH 2/7] lib: Add huge I/O map capability interfaces

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 27 Jan 2015 13:37:55 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Toshi Kani <toshi.kani@...com>
Cc:	hpa@...or.com, tglx@...utronix.de, mingo@...hat.com, arnd@...db.de,
	linux-mm@...ck.org, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/7] lib: Add huge I/O map capability interfaces

On Mon, 26 Jan 2015 18:01:55 -0700 Toshi Kani <toshi.kani@...com> wrote:

> > >  static int ioremap_pte_range(pmd_t *pmd, unsigned long addr,
> > >  		unsigned long end, phys_addr_t phys_addr, pgprot_t prot)
> > >  {
> > > @@ -74,6 +112,12 @@ int ioremap_page_range(unsigned long addr,
> > >  	unsigned long start;
> > >  	unsigned long next;
> > >  	int err;
> > > +	static int ioremap_huge_init_done;
> > > +
> > > +	if (!ioremap_huge_init_done) {
> > > +		ioremap_huge_init_done = 1;
> > > +		ioremap_huge_init();
> > > +	}
> > 
> > Looks hacky.  Why can't we just get the startup ordering correct?  It
> > at least needs a comment which fully explains the situation.
> 
> How about calling it from mm_init() after vmalloc_init()?  
> 
> void __init mm_init(void)
> 		:
>         percpu_init_late();
>         pgtable_init();
>         vmalloc_init();
> +       ioremap_huge_init();
>  }

Sure, that would be better, assuming it can be made to work.  Don't
forget to mark ioremap_huge_init() as __init.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/