diff options
Diffstat (limited to 'drivers/staging/zram/zram_drv.h')
-rw-r--r-- | drivers/staging/zram/zram_drv.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/staging/zram/zram_drv.h b/drivers/staging/zram/zram_drv.h index 3ad9486..e5cd246 100644 --- a/drivers/staging/zram/zram_drv.h +++ b/drivers/staging/zram/zram_drv.h @@ -47,7 +47,7 @@ static const unsigned default_disksize_perc_ram = 25; * Pages that compress to size greater than this are stored * uncompressed in memory. */ -static const unsigned max_zpage_size = PAGE_SIZE / 4 * 3; +static const size_t max_zpage_size = PAGE_SIZE / 4 * 3; /* * NOTE: max_zpage_size must be less than or equal to: @@ -61,7 +61,10 @@ static const unsigned max_zpage_size = PAGE_SIZE / 4 * 3; #define SECTOR_SIZE (1 << SECTOR_SHIFT) #define SECTORS_PER_PAGE_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) #define SECTORS_PER_PAGE (1 << SECTORS_PER_PAGE_SHIFT) -#define ZRAM_LOGICAL_BLOCK_SIZE 4096 +#define ZRAM_LOGICAL_BLOCK_SHIFT 12 +#define ZRAM_LOGICAL_BLOCK_SIZE (1 << ZRAM_LOGICAL_BLOCK_SHIFT) +#define ZRAM_SECTOR_PER_LOGICAL_BLOCK \ + (1 << (ZRAM_LOGICAL_BLOCK_SHIFT - SECTOR_SHIFT)) /* Flags for zram pages (table[page_no].flags) */ enum zram_pageflags { @@ -104,13 +107,13 @@ struct zram { void *compress_buffer; struct table *table; spinlock_t stat64_lock; /* protect 64-bit stats */ - struct mutex lock; /* protect compression buffers against - * concurrent writes */ + struct rw_semaphore lock; /* protect compression buffers and table + * against concurrent read and writes */ struct request_queue *queue; struct gendisk *disk; int init_done; - /* Prevent concurrent execution of device init and reset */ - struct mutex init_lock; + /* Prevent concurrent execution of device init, reset and R/W request */ + struct rw_semaphore init_lock; /* * This is the limit on amount of *uncompressed* worth of data * we can store in a disk. @@ -121,12 +124,12 @@ struct zram { }; extern struct zram *zram_devices; -extern unsigned int num_devices; +extern unsigned int zram_num_devices; #ifdef CONFIG_SYSFS extern struct attribute_group zram_disk_attr_group; #endif extern int zram_init_device(struct zram *zram); -extern void zram_reset_device(struct zram *zram); +extern void __zram_reset_device(struct zram *zram); #endif |