int sb_set_blocksize(struct super_block *sb, int size)
{
- int bits = 9; /* 2^9 = 512 */
-
if (set_blocksize(sb->s_bdev, size))
return 0;
/* If we get here, we know size is power of two
* and it's value is between 512 and PAGE_SIZE */
sb->s_blocksize = size;
- for (size >>= 10; size; size >>= 1)
- ++bits;
- sb->s_blocksize_bits = bits;
+ sb->s_blocksize_bits = blksize_bits(size);
return sb->s_blocksize;
}
static int
blkdev_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long max_blocks, struct buffer_head *bh, int create)
+ struct buffer_head *bh, int create)
{
sector_t end_block = max_block(I_BDEV(inode));
+ unsigned long max_blocks = bh->b_size >> inode->i_blkbits;
if ((iblock + max_blocks) > end_block) {
max_blocks = end_block - iblock;
*/
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(bdev_lock);
-static kmem_cache_t * bdev_cachep;
+static kmem_cache_t * bdev_cachep __read_mostly;
static struct inode *bdev_alloc_inode(struct super_block *sb)
{
SLAB_CTOR_CONSTRUCTOR)
{
memset(bdev, 0, sizeof(*bdev));
- sema_init(&bdev->bd_sem, 1);
- sema_init(&bdev->bd_mount_sem, 1);
+ mutex_init(&bdev->bd_mutex);
+ mutex_init(&bdev->bd_mount_mutex);
INIT_LIST_HEAD(&bdev->bd_inodes);
INIT_LIST_HEAD(&bdev->bd_list);
inode_init_once(&ei->vfs_inode);
.kill_sb = kill_anon_super,
};
-static struct vfsmount *bd_mnt;
+static struct vfsmount *bd_mnt __read_mostly;
struct super_block *blockdev_superblock;
void __init bdev_cache_init(void)
{
int err;
bdev_cachep = kmem_cache_create("bdev_cache", sizeof(struct bdev_inode),
- 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_PANIC,
+ 0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD|SLAB_PANIC),
init_once, NULL);
err = register_filesystem(&bd_type);
if (err)
}
owner = disk->fops->owner;
- down(&bdev->bd_sem);
+ mutex_lock(&bdev->bd_mutex);
if (!bdev->bd_openers) {
bdev->bd_disk = disk;
bdev->bd_contains = bdev;
if (ret)
goto out_first;
bdev->bd_contains = whole;
- down(&whole->bd_sem);
+ mutex_lock(&whole->bd_mutex);
whole->bd_part_count++;
p = disk->part[part - 1];
bdev->bd_inode->i_data.backing_dev_info =
whole->bd_inode->i_data.backing_dev_info;
if (!(disk->flags & GENHD_FL_UP) || !p || !p->nr_sects) {
whole->bd_part_count--;
- up(&whole->bd_sem);
+ mutex_unlock(&whole->bd_mutex);
ret = -ENXIO;
goto out_first;
}
kobject_get(&p->kobj);
bdev->bd_part = p;
bd_set_size(bdev, (loff_t) p->nr_sects << 9);
- up(&whole->bd_sem);
+ mutex_unlock(&whole->bd_mutex);
}
} else {
put_disk(disk);
if (bdev->bd_invalidated)
rescan_partitions(bdev->bd_disk, bdev);
} else {
- down(&bdev->bd_contains->bd_sem);
+ mutex_lock(&bdev->bd_contains->bd_mutex);
bdev->bd_contains->bd_part_count++;
- up(&bdev->bd_contains->bd_sem);
+ mutex_unlock(&bdev->bd_contains->bd_mutex);
}
}
bdev->bd_openers++;
- up(&bdev->bd_sem);
+ mutex_unlock(&bdev->bd_mutex);
unlock_kernel();
return 0;
put_disk(disk);
module_put(owner);
out:
- up(&bdev->bd_sem);
+ mutex_unlock(&bdev->bd_mutex);
unlock_kernel();
if (ret)
bdput(bdev);
struct inode *bd_inode = bdev->bd_inode;
struct gendisk *disk = bdev->bd_disk;
- down(&bdev->bd_sem);
+ mutex_lock(&bdev->bd_mutex);
lock_kernel();
if (!--bdev->bd_openers) {
sync_blockdev(bdev);
if (disk->fops->release)
ret = disk->fops->release(bd_inode, NULL);
} else {
- down(&bdev->bd_contains->bd_sem);
+ mutex_lock(&bdev->bd_contains->bd_mutex);
bdev->bd_contains->bd_part_count--;
- up(&bdev->bd_contains->bd_sem);
+ mutex_unlock(&bdev->bd_contains->bd_mutex);
}
if (!bdev->bd_openers) {
struct module *owner = disk->fops->owner;
bdev->bd_contains = NULL;
}
unlock_kernel();
- up(&bdev->bd_sem);
+ mutex_unlock(&bdev->bd_mutex);
bdput(bdev);
return ret;
}