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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-18 13:52:44 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-18 13:52:44 -0700 |
| commit | 936a0cd52aa5d024c583e36e2f21bf6ec2e527e4 (patch) | |
| tree | 01cffc11361be7d671b71ba86463f6649b39d552 /drivers/block/zram/zram_drv.c | |
| parent | 36bf51acc89d113f101e40f40af4ab53fbf5b60a (diff) | |
| parent | e26081808edadfd257c6c9d81014e3b25e9a6118 (diff) | |
Merge 4.1-rc4 into staging-next
We want the fixes in here for testing and merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block/zram/zram_drv.c')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index c94386aa563d..8dcbced0eafd 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -74,6 +74,27 @@ static inline struct zram *dev_to_zram(struct device *dev) return (struct zram *)dev_to_disk(dev)->private_data; } +static ssize_t compact_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + unsigned long nr_migrated; + struct zram *zram = dev_to_zram(dev); + struct zram_meta *meta; + + down_read(&zram->init_lock); + if (!init_done(zram)) { + up_read(&zram->init_lock); + return -EINVAL; + } + + meta = zram->meta; + nr_migrated = zs_compact(meta->mem_pool); + atomic64_add(nr_migrated, &zram->stats.num_migrated); + up_read(&zram->init_lock); + + return len; +} + static ssize_t disksize_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1038,6 +1059,7 @@ static const struct block_device_operations zram_devops = { .owner = THIS_MODULE }; +static DEVICE_ATTR_WO(compact); static DEVICE_ATTR_RW(disksize); static DEVICE_ATTR_RO(initstate); static DEVICE_ATTR_WO(reset); @@ -1114,6 +1136,7 @@ static struct attribute *zram_disk_attrs[] = { &dev_attr_num_writes.attr, &dev_attr_failed_reads.attr, &dev_attr_failed_writes.attr, + &dev_attr_compact.attr, &dev_attr_invalid_io.attr, &dev_attr_notify_free.attr, &dev_attr_zero_pages.attr, |