Subject: + zram-drop-init_done-struct-zram-member.patch added to -mm tree
To: sergey.senozhatsky@xxxxxxxxx,jmarchan@xxxxxxxxxx,minchan@xxxxxxxxxx,ngupta@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 04 Feb 2014 14:19:10 -0800
The patch titled
Subject: zram: drop `init_done' struct zram member
has been added to the -mm tree. Its filename is
zram-drop-init_done-struct-zram-member.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zram-drop-init_done-struct-zram-member.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zram-drop-init_done-struct-zram-member.patch
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------------------------------------------------------
From: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Subject: zram: drop `init_done' struct zram member
Introduce init_done() helper function which allows us to drop `init_done'
struct zram member. init_done() uses the fact that ->init_done == 1
equals to ->meta != NULL.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Acked-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 21 +++++++++++----------
drivers/block/zram/zram_drv.h | 1 -
2 files changed, 11 insertions(+), 11 deletions(-)
diff -puN drivers/block/zram/zram_drv.c~zram-drop-init_done-struct-zram-member drivers/block/zram/zram_drv.c
--- a/drivers/block/zram/zram_drv.c~zram-drop-init_done-struct-zram-member
+++ a/drivers/block/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 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(struc
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);
@@ -546,14 +551,12 @@ static void zram_reset_device(struct zra
struct zram_meta *meta;
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;
@@ -594,8 +597,6 @@ static void zram_init_device(struct zram
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, zram->disk->queue);
zram->meta = meta;
- zram->init_done = 1;
-
pr_debug("Initialization done!\n");
}
@@ -613,7 +614,7 @@ static ssize_t disksize_store(struct 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");
@@ -734,7 +735,7 @@ static void zram_make_request(struct req
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)) {
@@ -857,7 +858,7 @@ static int create_device(struct zram *zr
goto out_free_disk;
}
- zram->init_done = 0;
+ zram->meta = NULL;
return 0;
out_free_disk:
diff -puN drivers/block/zram/zram_drv.h~zram-drop-init_done-struct-zram-member drivers/block/zram/zram_drv.h
--- a/drivers/block/zram/zram_drv.h~zram-drop-init_done-struct-zram-member
+++ a/drivers/block/zram/zram_drv.h
@@ -95,7 +95,6 @@ struct zram {
struct zram_meta *meta;
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;
/*
_
Patches currently in -mm which might be from sergey.senozhatsky@xxxxxxxxx are
zram-drop-init_done-struct-zram-member.patch
zram-do-not-pass-rw-argument-to-__zram_make_request.patch
zram-remove-good-and-bad-compress-stats.patch
zram-use-atomic64_t-for-all-zram-stats.patch
zram-remove-zram-stats-code-duplication.patch
zram-report-failed-read-and-write-stats.patch
zram-drop-not-used-table-count-member.patch
zram-move-zram-size-warning-to-documentation.patch
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