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Re: [Qemu-devel] [PATCH v2] block: always compile-check debug prints
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v2] block: always compile-check debug prints |
Date: |
Thu, 28 Apr 2016 20:24:18 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 04/28/2016 07:44 PM, Zhou Jie wrote:
> Files with conditional debug statements should ensure that the printf is
> always compiled.
> This prevents bitrot of the format string of the debug statement.
The commit message needs to mention...
>
> Signed-off-by: Zhou Jie <address@hidden>
> ---
Right here would be a good place to list how v2 differs from v1.
> block/curl.c | 10 ++++++++--
> block/sheepdog.c | 13 ++++++++-----
> 2 files changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/block/curl.c b/block/curl.c
> index 5a8f8b6..da9f5e8 100644
> --- a/block/curl.c
> +++ b/block/curl.c
> @@ -36,10 +36,16 @@
> // #define DEBUG_VERBOSE
>
> #ifdef DEBUG_CURL
> -#define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
> +#define DEBUG_CURL_PRINT 1
> #else
> -#define DPRINTF(fmt, ...) do { } while (0)
> +#define DEBUG_CURL_PRINT 0
> #endif
> +#define DPRINTF(fmt, ...) \
> + do { \
> + if (DEBUG_CURL_PRINT) { \
> + fprintf(stderr, fmt, ## __VA_ARGS__); \
...that you are intentionally switching debug output to stderr.
The code changes themselves look fine to me now, so with a better commit
message, you could add:
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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