On 05/17/2010 05:33 PM, Minchan Kim wrote:
> On Mon, May 17, 2010 at 2:32 PM, Nitin Gupta <ngupta@xxxxxxxxxx> wrote:
>> Install handler for swap_slot_free_notify callback which is called
>> when a swap slot is no longer used. This handler immediately frees
>> memory allocated corresponding to the given swap slot.
>>
>> Signed-off-by: Nitin Gupta <ngupta@xxxxxxxxxx>
>> ---
>> drivers/staging/ramzswap/TODO | 5 -----
>> drivers/staging/ramzswap/ramzswap_drv.c | 22 +++++++++++++---------
>> 2 files changed, 13 insertions(+), 14 deletions(-)
>> delete mode 100644 drivers/staging/ramzswap/TODO
>>
>> diff --git a/drivers/staging/ramzswap/TODO b/drivers/staging/ramzswap/TODO
>> deleted file mode 100644
>> index 8d64e28..0000000
>> --- a/drivers/staging/ramzswap/TODO
>> +++ /dev/null
>> @@ -1,5 +0,0 @@
>> -TODO:
>> - - Add support for swap notifiers
>> -
>> -Please send patches to Greg Kroah-Hartman <greg@xxxxxxxxx> and
>> -Nitin Gupta <ngupta@xxxxxxxxxx>
>> diff --git a/drivers/staging/ramzswap/ramzswap_drv.c b/drivers/staging/ramzswap/ramzswap_drv.c
>> index ee5eb12..ab15276 100644
>> --- a/drivers/staging/ramzswap/ramzswap_drv.c
>> +++ b/drivers/staging/ramzswap/ramzswap_drv.c
>> @@ -795,14 +795,6 @@ static int ramzswap_write(struct ramzswap *rzs, struct bio *bio)
>>
>> src = rzs->compress_buffer;
>>
>> - /*
>> - * System swaps to same sector again when the stored page
>> - * is no longer referenced by any process. So, its now safe
>> - * to free the memory that was allocated for this page.
>> - */
>> - if (rzs->table[index].page || rzs_test_flag(rzs, index, RZS_ZERO))
>> - ramzswap_free_page(rzs, index);
>> -
>> mutex_lock(&rzs->lock);
>>
>> user_mem = kmap_atomic(page, KM_USER0);
>> @@ -1295,9 +1287,21 @@ out:
>> return ret;
>> }
>>
>> +void ramzswap_slot_free_notify(struct block_device *bdev, unsigned long index)
>> +{
>> + struct ramzswap *rzs;
>> +
>> + rzs = bdev->bd_disk->private_data;
>> + ramzswap_free_page(rzs, index);
>> + rzs_stat64_inc(rzs, &rzs->stats.notify_free);
>> +
>> + return;
>> +}
>
> Mistake. Let's remove _return_ in void function.
> Otherwise, looks good to me.
>
I will do this in upcoming cleanup patches.
Thanks for the review.
Nitin
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