Re: [PATCH] cifs: switch CIFSSMBQAllEAs to use memcmp

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On 08/20/2011 06:48 AM, Jeff Layton wrote:
> ...as that's more efficient when we know that the lengths are equal.
> 
> Reported-by: David Howells <dhowells@xxxxxxxxxx>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
>  fs/cifs/cifssmb.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index f4d0988..7bac906 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -5849,7 +5849,7 @@ QAllEAsRetry:
>  
>  		if (ea_name) {
>  			if (ea_name_len == name_len &&
> -			    strncmp(ea_name, temp_ptr, name_len) == 0) {
> +			    memcmp(ea_name, temp_ptr, name_len) == 0) {
>  				temp_ptr += name_len + 1;
>  				rc = value_len;
>  				if (buf_size == 0)


Looks good to me.

Reviewed-by: Suresh Jayaraman <sjayaraman@xxxxxxx>

We generally don't query for all EAs very often. Not sure whether how
much it help improve efficiency. But, I do agree that memxxx variants
are better when we know the length.


-- 
Suresh Jayaraman
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