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drivers: zram_drv: Expose zram_compact() for zram0

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* Automatic compaction needs this

Signed-off-by: LibXZR <xzr467706992@163.com>
Change-Id: If3ec2e7be7974934fcd009fe96aaa00660f5c060
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
This commit is contained in:
LibXZR 2021-04-24 23:18:01 +08:00 committed by spakkkk
parent b821512c3c
commit 1a0700df5c
1 changed files with 20 additions and 11 deletions
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31
drivers/block/zram/zram_drv.c
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@ -51,6 +51,8 @@ static unsigned int num_devices = 1;
*/
static size_t huge_class_size;
static struct zram *zram0;
static const struct block_device_operations zram_devops;
static const struct block_device_operations zram_wb_devops;
@ -979,20 +981,25 @@ static ssize_t use_dedup_store(struct device *dev,
}
#endif
void zram_compact(void)
{
if (!zram0)
return;
down_read(&zram0->init_lock);
if (!init_done(zram0)) {
up_read(&zram0->init_lock);
return;
}
zs_compact(zram0->mem_pool);
up_read(&zram0->init_lock);
}
static ssize_t compact_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct zram *zram = dev_to_zram(dev);
down_read(&zram->init_lock);
if (!init_done(zram)) {
up_read(&zram->init_lock);
return -EINVAL;
}
zs_compact(zram->mem_pool);
up_read(&zram->init_lock);
zram_compact();
return len;
}
@ -2009,6 +2016,7 @@ static int zram_add(void)
strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
zram_debugfs_register(zram);
zram0 = zram;
pr_info("Added device: %s\n", zram->disk->disk_name);
return device_id;
@ -2050,6 +2058,7 @@ static int zram_remove(struct zram *zram)
del_gendisk(zram->disk);
blk_cleanup_queue(zram->disk->queue);
put_disk(zram->disk);
zram0 = NULL;
kfree(zram);
return 0;
}