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path: root/drivers/block/zram/zram_drv.c
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Diffstat (limited to 'drivers/block/zram/zram_drv.c')
-rw-r--r--drivers/block/zram/zram_drv.c30
1 files changed, 19 insertions, 11 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 9100ac36670a..bff3d4021c18 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -52,6 +52,9 @@ static unsigned int num_devices = 1;
*/
static size_t huge_class_size;
+static const struct block_device_operations zram_devops;
+static const struct block_device_operations zram_wb_devops;
+
static void zram_free_page(struct zram *zram, size_t index);
static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
u32 index, int offset, struct bio *bio);
@@ -408,8 +411,7 @@ static void reset_bdev(struct zram *zram)
zram->backing_dev = NULL;
zram->old_block_size = 0;
zram->bdev = NULL;
- zram->disk->queue->backing_dev_info->capabilities |=
- BDI_CAP_SYNCHRONOUS_IO;
+ zram->disk->fops = &zram_devops;
kvfree(zram->bitmap);
zram->bitmap = NULL;
}
@@ -491,9 +493,10 @@ static ssize_t backing_dev_store(struct device *dev,
goto out;
}
- bdev = bdgrab(I_BDEV(inode));
- err = blkdev_get(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram);
- if (err < 0) {
+ bdev = blkdev_get_by_dev(inode->i_rdev,
+ FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram);
+ if (IS_ERR(bdev)) {
+ err = PTR_ERR(bdev);
bdev = NULL;
goto out;
}
@@ -528,8 +531,7 @@ static ssize_t backing_dev_store(struct device *dev,
* freely but in fact, IO is going on so finally could cause
* use-after-free when the IO is really done.
*/
- zram->disk->queue->backing_dev_info->capabilities &=
- ~BDI_CAP_SYNCHRONOUS_IO;
+ zram->disk->fops = &zram_wb_devops;
up_write(&zram->init_lock);
pr_info("setup backing device %s\n", file_name);
@@ -1739,7 +1741,7 @@ static ssize_t disksize_store(struct device *dev,
zram->disksize = disksize;
set_capacity(zram->disk, zram->disksize >> SECTOR_SHIFT);
- revalidate_disk(zram->disk);
+ revalidate_disk_size(zram->disk, true);
up_write(&zram->init_lock);
return len;
@@ -1786,7 +1788,7 @@ static ssize_t reset_store(struct device *dev,
/* Make sure all the pending I/O are finished */
fsync_bdev(bdev);
zram_reset_device(zram);
- revalidate_disk(zram->disk);
+ revalidate_disk_size(zram->disk, true);
bdput(bdev);
mutex_lock(&bdev->bd_mutex);
@@ -1819,6 +1821,13 @@ static const struct block_device_operations zram_devops = {
.owner = THIS_MODULE
};
+static const struct block_device_operations zram_wb_devops = {
+ .open = zram_open,
+ .submit_bio = zram_submit_bio,
+ .swap_slot_free_notify = zram_slot_free_notify,
+ .owner = THIS_MODULE
+};
+
static DEVICE_ATTR_WO(compact);
static DEVICE_ATTR_RW(disksize);
static DEVICE_ATTR_RO(initstate);
@@ -1946,8 +1955,7 @@ static int zram_add(void)
if (ZRAM_LOGICAL_BLOCK_SIZE == PAGE_SIZE)
blk_queue_max_write_zeroes_sectors(zram->disk->queue, UINT_MAX);
- zram->disk->queue->backing_dev_info->capabilities |=
- (BDI_CAP_STABLE_WRITES | BDI_CAP_SYNCHRONOUS_IO);
+ blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, zram->disk->queue);
device_add_disk(NULL, zram->disk, zram_disk_attr_groups);
strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));