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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>
This commit is contained in:
Marek Vasut 2021-05-18 00:39:39 +02:00 committed by Tom Rini
parent 53ba2c21c2
commit 9e8bb07885
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/disk-io.c
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@ -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;