[PATCH] fs: btrfs: Add missing cache aligned allocation

Marek Vasut marex at denx.de
Tue May 18 00:39:39 CEST 2021

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 at denx.de>
Cc: Marek Behún <marek.behun at nic.cz>
Cc: Qu Wenruo <wqu at suse.com>
 fs/btrfs/disk-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c6fdec95c16..349411c3ccd 100644
--- a/fs/btrfs/disk-io.c
+++ b/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)
 	struct btrfs_super_block *buf = (struct btrfs_super_block *)tmp;
 	int ret;

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