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authorJens Axboe <jens.axboe@oracle.com>2008-06-27 09:12:09 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-07-03 13:21:15 +0200
commitb24498d477a14680fc3bb3ad884fa9fa76a2d237 (patch)
tree1ba2c9f24b3f22f45fa424ad904fb6dcc5d67790
parent06a452e5b95eb669b7ad414ccf587dfc2d91b217 (diff)
downloadop-kernel-dev-b24498d477a14680fc3bb3ad884fa9fa76a2d237.zip
op-kernel-dev-b24498d477a14680fc3bb3ad884fa9fa76a2d237.tar.gz
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>
-rw-r--r--block/blk-integrity.c17
-rw-r--r--include/linux/blkdev.h8
2 files changed, 11 insertions, 14 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 4ffa381..3f1a847 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -217,17 +217,16 @@ static ssize_t integrity_read_store(struct blk_integrity *bi,
unsigned long val = simple_strtoul(p, &p, 10);
if (val)
- set_bit(INTEGRITY_FLAG_READ, &bi->flags);
+ bi->flags |= INTEGRITY_FLAG_READ;
else
- clear_bit(INTEGRITY_FLAG_READ, &bi->flags);
+ bi->flags &= ~INTEGRITY_FLAG_READ;
return count;
}
static ssize_t integrity_read_show(struct blk_integrity *bi, char *page)
{
- return sprintf(page, "%d\n",
- test_bit(INTEGRITY_FLAG_READ, &bi->flags) ? 1 : 0);
+ return sprintf(page, "%d\n", (bi->flags & INTEGRITY_FLAG_READ) != 0);
}
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);
if (val)
- set_bit(INTEGRITY_FLAG_WRITE, &bi->flags);
+ bi->flags |= INTEGRITY_FLAG_WRITE;
else
- clear_bit(INTEGRITY_FLAG_WRITE, &bi->flags);
+ bi->flags &= ~INTEGRITY_FLAG_WRITE;
return count;
}
static ssize_t integrity_write_show(struct blk_integrity *bi, char *page)
{
- return sprintf(page, "%d\n",
- test_bit(INTEGRITY_FLAG_WRITE, &bi->flags) ? 1 : 0);
+ return sprintf(page, "%d\n", (bi->flags & INTEGRITY_FLAG_WRITE) != 0);
}
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);
- set_bit(INTEGRITY_FLAG_READ, &bi->flags);
- set_bit(INTEGRITY_FLAG_WRITE, &bi->flags);
+ bi->flags |= INTEGRITY_FLAG_READ | INTEGRITY_FLAG_WRITE;
bi->sector_size = disk->queue->hardsect_size;
disk->integrity = bi;
} else
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a842b77..7ab8aca 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -870,8 +870,8 @@ void kblockd_flush_work(struct work_struct *work);
#if defined(CONFIG_BLK_DEV_INTEGRITY)
-#define INTEGRITY_FLAG_READ 1 /* verify data integrity on read */
-#define INTEGRITY_FLAG_WRITE 2 /* generate data integrity on write */
+#define INTEGRITY_FLAG_READ 2 /* verify data integrity on read */
+#define INTEGRITY_FLAG_WRITE 4 /* generate data integrity on write */
struct blk_integrity_exchg {
void *prot_buf;
@@ -940,11 +940,11 @@ static inline int bdev_integrity_enabled(struct block_device *bdev, int rw)
return 0;
if (rw == READ && bi->verify_fn != NULL &&
- test_bit(INTEGRITY_FLAG_READ, &bi->flags))
+ (bi->flags & INTEGRITY_FLAG_READ))
return 1;
if (rw == WRITE && bi->generate_fn != NULL &&
- test_bit(INTEGRITY_FLAG_WRITE, &bi->flags))
+ (bi->flags & INTEGRITY_FLAG_WRITE))
return 1;
return 0;
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