I tried applying this patch, but the fragmentation_percent function is
giving me:
WARNING: "__udivdi3"
[/home/partition6/yien/git/linux-git/fs/btrfs/btrfs.ko] undefined!
when I compile, and the module fails to load, even though the build
completes. I've traced it to the calculation of max_fragments:
max_fragments = (block_group->key.offset -
btrfs_block_group_used(&block_group->item)) /
block_group->fragment_size;
It seems that accessing block_group in here is causing a reference to
__udivdi3 somehow. Any idea what's going on here?
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