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Diffstat (limited to 'drivers/dax')
-rw-r--r--drivers/dax/device.c2
-rw-r--r--drivers/dax/super.c40
2 files changed, 21 insertions, 21 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index aff2c1594220..de2f8297a210 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -594,7 +594,7 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
if (!count)
return ERR_PTR(-EINVAL);
- dev_dax = kzalloc(sizeof(*dev_dax) + sizeof(*res) * count, GFP_KERNEL);
+ dev_dax = kzalloc(struct_size(dev_dax, res, count), GFP_KERNEL);
if (!dev_dax)
return ERR_PTR(-ENOMEM);
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 88e77b7f0c4b..903d9c473749 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -74,17 +74,16 @@ EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
/**
* __bdev_dax_supported() - Check if the device supports dax for filesystem
- * @sb: The superblock of the device
+ * @bdev: block device to check
* @blocksize: The block size of the device
*
* This is a library function for filesystems to check if the block device
* can be mounted with dax option.
*
- * Return: negative errno if unsupported, 0 if supported.
+ * Return: true if supported, false if unsupported
*/
-int __bdev_dax_supported(struct super_block *sb, int blocksize)
+bool __bdev_dax_supported(struct block_device *bdev, int blocksize)
{
- struct block_device *bdev = sb->s_bdev;
struct dax_device *dax_dev;
bool dax_enabled = false;
pgoff_t pgoff;
@@ -92,25 +91,26 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
void *kaddr;
pfn_t pfn;
long len;
+ char buf[BDEVNAME_SIZE];
if (blocksize != PAGE_SIZE) {
- pr_debug("VFS (%s): error: unsupported blocksize for dax\n",
- sb->s_id);
- return -EINVAL;
+ pr_debug("%s: error: unsupported blocksize for dax\n",
+ bdevname(bdev, buf));
+ return false;
}
err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff);
if (err) {
- pr_debug("VFS (%s): error: unaligned partition for dax\n",
- sb->s_id);
- return err;
+ pr_debug("%s: error: unaligned partition for dax\n",
+ bdevname(bdev, buf));
+ return false;
}
dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
if (!dax_dev) {
- pr_debug("VFS (%s): error: device does not support dax\n",
- sb->s_id);
- return -EOPNOTSUPP;
+ pr_debug("%s: error: device does not support dax\n",
+ bdevname(bdev, buf));
+ return false;
}
id = dax_read_lock();
@@ -120,9 +120,9 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
put_dax(dax_dev);
if (len < 1) {
- pr_debug("VFS (%s): error: dax access failed (%ld)\n",
- sb->s_id, len);
- return len < 0 ? len : -EIO;
+ pr_debug("%s: error: dax access failed (%ld)\n",
+ bdevname(bdev, buf), len);
+ return false;
}
if (IS_ENABLED(CONFIG_FS_DAX_LIMITED) && pfn_t_special(pfn)) {
@@ -146,11 +146,11 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
}
if (!dax_enabled) {
- pr_debug("VFS (%s): error: dax support not enabled\n",
- sb->s_id);
- return -EOPNOTSUPP;
+ pr_debug("%s: error: dax support not enabled\n",
+ bdevname(bdev, buf));
+ return false;
}
- return 0;
+ return true;
}
EXPORT_SYMBOL_GPL(__bdev_dax_supported);
#endif