[PATCH 61/78] zram: do not call set_blocksize

Christoph Hellwig
2020-11-16T15:12:17Z

set_blocksize is used by file systems to use their preferred buffer cache
block size. Block drivers should not set it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/zram/zram_drv.c | 11 +----------
drivers/block/zram/zram_drv.h | 1 -
2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 3641434a9b154d..d00b5761ec0b21 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -403,13 +403,10 @@ static void reset_bdev(struct zram *zram)
return;

bdev = zram->bdev;
- if (zram->old_block_size)
- set_blocksize(bdev, zram->old_block_size);
blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
/* hope filp_close flush all of IO */
filp_close(zram->backing_dev, NULL);
zram->backing_dev = NULL;
- zram->old_block_size = 0;
zram->bdev = NULL;
zram->disk->fops = &zram_devops;
kvfree(zram->bitmap);
@@ -454,7 +451,7 @@ static ssize_t backing_dev_store(struct device *dev,
struct file *backing_dev = NULL;
struct inode *inode;
struct address_space *mapping;
- unsigned int bitmap_sz, old_block_size = 0;
+ unsigned int bitmap_sz;
unsigned long nr_pages, *bitmap = NULL;
struct block_device *bdev = NULL;
int err;
@@ -509,14 +506,8 @@ static ssize_t backing_dev_store(struct device *dev,
goto out;
}

- old_block_size = block_size(bdev);
- err = set_blocksize(bdev, PAGE_SIZE);
- if (err)
- goto out;
-
reset_bdev(zram);

- zram->old_block_size = old_block_size;
zram->bdev = bdev;
zram->backing_dev = backing_dev;
zram->bitmap = bitmap;
diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index f2fd46daa76045..712354a4207c77 100644
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -118,7 +118,6 @@ struct zram {
bool wb_limit_enable;
u64 bd_wb_limit;
struct block_device *bdev;
- unsigned int old_block_size;
unsigned long *bitmap;
unsigned long nr_pages;
#endif