On 10/19/2012 07:24 PM, Johannes Weiner wrote:
> On Fri, Oct 19, 2012 at 04:25:47PM +0530, Srivatsa S. Bhat wrote:
>> Move the check for populated_zone() to the control statement of the
>> 'for' loop and get rid of the odd looking if/else block.
>>
>> Signed-off-by: Srivatsa S. Bhat <[email protected]>
>> ---
>>
>>  include/linux/mmzone.h |    7 ++-----
>>  1 file changed, 2 insertions(+), 5 deletions(-)
>>
>> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
>> index 50aaca8..5bdf02e 100644
>> --- a/include/linux/mmzone.h
>> +++ b/include/linux/mmzone.h
>> @@ -913,11 +913,8 @@ extern struct zone *next_zone(struct zone *zone);
>>  
>>  #define for_each_populated_zone(zone)                       \
>>      for (zone = (first_online_pgdat())->node_zones; \
>> -         zone;                                      \
>> -         zone = next_zone(zone))                    \
>> -            if (!populated_zone(zone))              \
>> -                    ; /* do nothing */              \
>> -            else
>> +         zone && populated_zone(zone);              \
>> +         zone = next_zone(zone))
> 
> I don't think we want to /abort/ the loop when encountering an
> unpopulated zone.
> 

Oops! I totally missed that.. thanks for catching it! Please ignore
the patch.

Regards,
Srivatsa S. Bhat

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