Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751583Ab3IFNyU (ORCPT ); Fri, 6 Sep 2013 09:54:20 -0400 Received: from mail-pd0-f175.google.com ([209.85.192.175]:64418 "EHLO mail-pd0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750743Ab3IFNyT (ORCPT ); Fri, 6 Sep 2013 09:54:19 -0400 Date: Fri, 6 Sep 2013 16:52:58 +0300 From: Sergey Senozhatsky To: Greg Kroah-Hartman Cc: Minchan Kim , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] staging: zram: remove init_done from zram struct Message-ID: <20130906135258.GB2238@swordfish.minsk.epam.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3539 Lines: 113 `zram->init_done != 0' equals to `zram->meta != NULL', so init_done can be removed. Signed-off-by: Sergey Senozhatsky --- drivers/staging/zram/zram_drv.c | 18 +++++++----------- drivers/staging/zram/zram_drv.h | 1 - 2 files changed, 7 insertions(+), 12 deletions(-) diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 17386e2..34b72ea 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -60,7 +60,7 @@ static ssize_t initstate_show(struct device *dev, { struct zram *zram = dev_to_zram(dev); - return sprintf(buf, "%u\n", zram->init_done); + return sprintf(buf, "%u\n", zram->meta != NULL); } static ssize_t num_reads_show(struct device *dev, @@ -133,7 +133,7 @@ static ssize_t mem_used_total_show(struct device *dev, struct zram_meta *meta = zram->meta; down_read(&zram->init_lock); - if (zram->init_done) + if (meta) val = zs_get_total_size_bytes(meta->mem_pool); up_read(&zram->init_lock); @@ -556,14 +556,12 @@ static void zram_reset_device(struct zram *zram, bool reset_capacity) flush_work(&zram->free_work); down_write(&zram->init_lock); - if (!zram->init_done) { + if (!zram->meta) { up_write(&zram->init_lock); return; } meta = zram->meta; - zram->init_done = 0; - /* Free all pages that are still in this zram device */ for (index = 0; index < zram->disksize >> PAGE_SHIFT; index++) { unsigned long handle = meta->table[index].handle; @@ -573,7 +571,7 @@ static void zram_reset_device(struct zram *zram, bool reset_capacity) zs_free(meta->mem_pool, handle); } - zram_meta_free(zram->meta); + zram_meta_free(meta); zram->meta = NULL; /* Reset stats */ memset(&zram->stats, 0, sizeof(zram->stats)); @@ -602,9 +600,7 @@ static void zram_init_device(struct zram *zram, struct zram_meta *meta) /* zram devices sort of resembles non-rotational disks */ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, zram->disk->queue); - zram->meta = meta; - zram->init_done = 1; pr_debug("Initialization done!\n"); } @@ -623,7 +619,7 @@ static ssize_t disksize_store(struct device *dev, disksize = PAGE_ALIGN(disksize); meta = zram_meta_alloc(disksize); down_write(&zram->init_lock); - if (zram->init_done) { + if (zram->meta) { up_write(&zram->init_lock); zram_meta_free(meta); pr_info("Cannot change disksize for initialized device\n"); @@ -731,7 +727,7 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio) struct zram *zram = queue->queuedata; down_read(&zram->init_lock); - if (unlikely(!zram->init_done)) + if (unlikely(!zram->meta)) goto error; if (!valid_io_request(zram, bio)) { @@ -880,7 +876,7 @@ static int create_device(struct zram *zram, int device_id) goto out_free_disk; } - zram->init_done = 0; + zram->meta = NULL; return 0; out_free_disk: diff --git a/drivers/staging/zram/zram_drv.h b/drivers/staging/zram/zram_drv.h index 97a3acf..b1100cf 100644 --- a/drivers/staging/zram/zram_drv.h +++ b/drivers/staging/zram/zram_drv.h @@ -110,7 +110,6 @@ struct zram { struct request_queue *queue; struct gendisk *disk; - int init_done; /* Prevent concurrent execution of device init, reset and R/W request */ struct rw_semaphore init_lock; /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/