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5b1a503aba
Older kernels don't have /sys/fs/btrfs. btrfs/010 will happily run until it goes to check its work against sysfs and finds those files don't exist. This patch introduces a require check to ensure that the sysfs files are present before running. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>