linux-kernel - Re: [PATCH 5/7] zram/xvmalloc: wrap debug code in #ifdef DEBUG

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Message-ID: <AANLkTi=w2Mq102MM=57y6P=YWQ_iUX5rx7oLaabGkCPj@mail.gmail.com>
Date:	Wed, 26 Jan 2011 19:44:27 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Nitin Gupta <ngupta@...are.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Cc:	Robert Jennings <rcj@...ux.vnet.ibm.com>
Subject: Re: [PATCH 5/7] zram/xvmalloc: wrap debug code in #ifdef DEBUG

On Wed, Jan 26, 2011 at 7:26 PM, Robert Jennings <rcj@...ux.vnet.ibm.com> wrote:
> This wraps the code, noted by comments as being debug code, with
> #ifdef DEBUG so that it is removed from running in non-debug kernels.
>
> Signed-off-by: Robert Jennings <rcj@...ux.vnet.ibm.com>
> ---
>  drivers/staging/zram/xvmalloc.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/staging/zram/xvmalloc.c b/drivers/staging/zram/xvmalloc.c
> index b3622f1..172514e 100644
> --- a/drivers/staging/zram/xvmalloc.c
> +++ b/drivers/staging/zram/xvmalloc.c
> @@ -219,7 +219,6 @@ static void insert_block(struct xv_pool *pool, struct page *page, u32 offset,
>  static void remove_block_head(struct xv_pool *pool,
>                        struct block_header *block, u32 slindex)
>  {
> -       struct block_header *tmpblock;
>        u32 flindex = slindex / BITS_PER_LONG;
>
>        pool->freelist[slindex].page = block->link.next_page;
> @@ -232,6 +231,8 @@ static void remove_block_head(struct xv_pool *pool,
>                if (!pool->slbitmap[flindex])
>                        __clear_bit(flindex, &pool->flbitmap);
>        } else {
> +#ifdef DEBUG

Shouldn't that be something people can enable from Kconfig?

> +               struct block_header *tmpblock;
>                /*
>                 * DEBUG ONLY: We need not reinitialize freelist head previous
>                 * pointer to 0 - we never depend on its value. But just for
> @@ -242,6 +243,7 @@ static void remove_block_head(struct xv_pool *pool,
>                tmpblock->link.prev_page = 0;
>                tmpblock->link.prev_offset = 0;
>                put_ptr_atomic(tmpblock, KM_USER1);
> +#endif
>        }
>  }
>
> --
> 1.6.0.2
>
> --
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