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fs: btrfs: Add missing cache aligned allocation

The superblock buffer must be cache aligned, since it might be used
in DMA context, allocate it using ALLOC_CACHE_ALIGN_BUFFER() just
like it was done in btrfs_read_superblock() and read_tree_node().

This fixes this output on boot and non-working btrfs on iMX53:
CACHE: Misaligned operation at range [ced299d0, ced2a9d0]

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Behún <marek.behun@nic.cz>
Cc: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Marek Vasut 3 years ago
parent
commit
9e8bb07885
1 changed files with 1 additions and 1 deletions
  1. 1 1
      fs/btrfs/disk-io.c

+ 1 - 1
fs/btrfs/disk-io.c

@@ -291,7 +291,7 @@ error_out:
 int btrfs_read_dev_super(struct blk_desc *desc, struct disk_partition *part,
 			 struct btrfs_super_block *sb)
 {
-	char tmp[BTRFS_SUPER_INFO_SIZE];
+	ALLOC_CACHE_ALIGN_BUFFER(char, tmp, BTRFS_SUPER_INFO_SIZE);
 	struct btrfs_super_block *buf = (struct btrfs_super_block *)tmp;
 	int ret;