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block: integrity flags can't use bit ops on unsigned short 

Just use normal open coded bit operations instead, they need not be
atomic.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2008-06-27 09:12:09 +02:00
parent 06a452e5b9
commit b24498d477
2 changed files with 11 additions and 14 deletions
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17
block/blk-integrity.c
View File

@ -217,17 +217,16 @@ static ssize_t integrity_read_store(struct blk_integrity *bi,
unsigned long val = simple_strtoul(p, &p, 10); unsigned long val = simple_strtoul(p, &p, 10);
if (val) if (val)
set_bit(INTEGRITY_FLAG_READ, &bi->flags); bi->flags |= INTEGRITY_FLAG_READ;
else else
clear_bit(INTEGRITY_FLAG_READ, &bi->flags); bi->flags &= ~INTEGRITY_FLAG_READ;
return count; return count;
} }
static ssize_t integrity_read_show(struct blk_integrity *bi, char *page) static ssize_t integrity_read_show(struct blk_integrity *bi, char *page)
{ {
return sprintf(page, "%d\n", return sprintf(page, "%d\n", (bi->flags & INTEGRITY_FLAG_READ) != 0);
test_bit(INTEGRITY_FLAG_READ, &bi->flags) ? 1 : 0);
} }
static ssize_t integrity_write_store(struct blk_integrity *bi, static ssize_t integrity_write_store(struct blk_integrity *bi,
@ -237,17 +236,16 @@ static ssize_t integrity_write_store(struct blk_integrity *bi,
unsigned long val = simple_strtoul(p, &p, 10); unsigned long val = simple_strtoul(p, &p, 10);
if (val) if (val)
set_bit(INTEGRITY_FLAG_WRITE, &bi->flags); bi->flags |= INTEGRITY_FLAG_WRITE;
else else
clear_bit(INTEGRITY_FLAG_WRITE, &bi->flags); bi->flags &= ~INTEGRITY_FLAG_WRITE;
return count; return count;
} }
static ssize_t integrity_write_show(struct blk_integrity *bi, char *page) static ssize_t integrity_write_show(struct blk_integrity *bi, char *page)
{ {
return sprintf(page, "%d\n", return sprintf(page, "%d\n", (bi->flags & INTEGRITY_FLAG_WRITE) != 0);
test_bit(INTEGRITY_FLAG_WRITE, &bi->flags) ? 1 : 0);
} }
static struct integrity_sysfs_entry integrity_format_entry = { static struct integrity_sysfs_entry integrity_format_entry = {
@ -340,8 +338,7 @@ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
kobject_uevent(&bi->kobj, KOBJ_ADD); kobject_uevent(&bi->kobj, KOBJ_ADD);
set_bit(INTEGRITY_FLAG_READ, &bi->flags); bi->flags |= INTEGRITY_FLAG_READ | INTEGRITY_FLAG_WRITE;
set_bit(INTEGRITY_FLAG_WRITE, &bi->flags);
bi->sector_size = disk->queue->hardsect_size; bi->sector_size = disk->queue->hardsect_size;
disk->integrity = bi; disk->integrity = bi;
} else } else

8
include/linux/blkdev.h
View File

@ -870,8 +870,8 @@ void kblockd_flush_work(struct work_struct *work);
#if defined(CONFIG_BLK_DEV_INTEGRITY) #if defined(CONFIG_BLK_DEV_INTEGRITY)
#define INTEGRITY_FLAG_READ 1 /* verify data integrity on read */ #define INTEGRITY_FLAG_READ 2 /* verify data integrity on read */
#define INTEGRITY_FLAG_WRITE 2 /* generate data integrity on write */ #define INTEGRITY_FLAG_WRITE 4 /* generate data integrity on write */
struct blk_integrity_exchg { struct blk_integrity_exchg {
void *prot_buf; void *prot_buf;
@ -940,11 +940,11 @@ static inline int bdev_integrity_enabled(struct block_device *bdev, int rw)
return 0; return 0;
if (rw == READ && bi->verify_fn != NULL && if (rw == READ && bi->verify_fn != NULL &&
test_bit(INTEGRITY_FLAG_READ, &bi->flags)) (bi->flags & INTEGRITY_FLAG_READ))
return 1; return 1;
if (rw == WRITE && bi->generate_fn != NULL && if (rw == WRITE && bi->generate_fn != NULL &&
test_bit(INTEGRITY_FLAG_WRITE, &bi->flags)) (bi->flags & INTEGRITY_FLAG_WRITE))
return 1; return 1;
return 0; return 0;