linux-kernel - Re: [PATCH] memblock: Add limit checking to memblock_virt

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Message-ID: <CAGa+x85rWSAw0KCt-gJTkpvfur5ujYYqQXGJ0G+z135udTHYgw@mail.gmail.com>
Date:	Tue, 28 Jan 2014 17:25:19 -0800
From:	Kevin Hilman <khilman@...aro.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Olof Johansson <olof@...om.net>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] memblock: Add limit checking to memblock_virt_alloc

On Tue, Jan 28, 2014 at 2:04 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> In original bootmem wrapper for memblock, we have limit checking.
>
> Add it to memblock_virt_alloc, to address arm and x86 booting crash.
>
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>
> ---
>  mm/memblock.c |    3 +++
>  1 file changed, 3 insertions(+)
>
> Index: linux-2.6/mm/memblock.c
> ===================================================================
> --- linux-2.6.orig/mm/memblock.c
> +++ linux-2.6/mm/memblock.c
> @@ -1077,6 +1077,9 @@ static void * __init memblock_virt_alloc
>         if (!align)
>                 align = SMP_CACHE_BYTES;
>
> +       if (max_addr > memblock.current_limit)
> +               max_addr = memblock.current_limit;
> +
>  again:
>         alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
>                                             nid);

Tested-by: Kevin Hilman <khilman@...aro.org>

Verified various ARM boots to be passing again.

Kevin
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