linux-kernel - Re: [RFC 07/11] mm: debug: VM

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Message-ID: <20150430162201.GC17344@node.dhcp.inet.fi>
Date:	Thu, 30 Apr 2015 19:22:01 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	linux-mm@...ck.org
Subject: Re: [RFC 07/11] mm: debug: VM_BUG()

On Tue, Apr 14, 2015 at 04:56:29PM -0400, Sasha Levin wrote:
> VM_BUG() complements VM_BUG_ON() just like with WARN() and WARN_ON().
> 
> This lets us format custom strings to output when a VM_BUG() is hit.
> 
> Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
> ---
>  include/linux/mmdebug.h |   10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
> index 8b3f5a0..42f41e3 100644
> --- a/include/linux/mmdebug.h
> +++ b/include/linux/mmdebug.h
> @@ -12,7 +12,14 @@ char *format_page(struct page *page, char *buf, char *end);
>  #ifdef CONFIG_DEBUG_VM
>  char *format_vma(const struct vm_area_struct *vma, char *buf, char *end);
>  char *format_mm(const struct mm_struct *mm, char *buf, char *end);
> -#define VM_BUG_ON(cond) BUG_ON(cond)
> +#define VM_BUG(cond, fmt...)						\

vm_bugf() ? ;)

-- 
 Kirill A. Shutemov
--
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