`zram->init_done' in fact mimics `zram->meta != NULL' value.
Introduce init_done() function that checks zram->meta (iow,
checks if initialisation was performed), so `zram->init_done'
can be removed.
v3: init_done() in handle_pending_slot_free()
v2: introduce init_done()
Signed-off-by: Sergey Senozhatsky <sergey.senozhat...@gmail.com>
---
drivers/staging/zram/zram_drv.c | 23 ++++++++++++-----------
drivers/staging/zram/zram_drv.h | 1 -
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index 7a2d4de..dcfe07c 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -42,6 +42,11 @@ static struct zram *zram_devices;
/* Module params (documentation at end) */
static unsigned int num_devices = 1;
+static inline int init_done(struct zram *zram)
+{
+ return zram->meta != NULL;
+}
+
static inline struct zram *dev_to_zram(struct device *dev)
{
return (struct zram *)dev_to_disk(dev)->private_data;
@@ -60,7 +65,7 @@ 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", init_done(zram));
}
static ssize_t num_reads_show(struct device *dev,
@@ -133,7 +138,7 @@ 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 (init_done(zram))
val = zs_get_total_size_bytes(meta->mem_pool);
up_read(&zram->init_lock);
@@ -521,7 +526,7 @@ static void handle_pending_slot_free(struct zram *zram)
while (zram->slot_free_rq) {
free_rq = zram->slot_free_rq;
zram->slot_free_rq = free_rq->next;
- if (zram->init_done)
+ if (init_done(zram))
zram_free_page(zram, free_rq->index);
kfree(free_rq);
}
@@ -553,14 +558,12 @@ 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 (!init_done(zram)) {
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;
@@ -599,9 +602,7 @@ 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");
}
@@ -620,7 +621,7 @@ 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 (init_done(zram)) {
up_write(&zram->init_lock);
zram_meta_free(meta);
pr_info("Cannot change disksize for initialized device\n");
@@ -728,7 +729,7 @@ 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(!init_done(zram)))
goto error;
if (!valid_io_request(zram, bio)) {
@@ -876,7 +877,7 @@ 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;
/*
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