Commit a175423c authored Feb 28, 2012 by Chris Mason

Btrfs: fix casting error in scrub reada code



The reada code from scrub was casting down a u64 to
an unsigned long so it could insert it into a radix tree.

What it really wanted to do was cast down the result of a shift, instead
of casting down the u64.  The bug resulted in trying to insert our
reada struct into the wrong place, which caused soft lockups and other
problems.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent d3b01064

fs/btrfs/reada.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -305,7 +305,7 @@ again:

		spin_lock(&fs_info->reada_lock);
		ret = radix_tree_insert(&dev->reada_zones,
		(unsigned long)zone->end >> PAGE_CACHE_SHIFT,
		(unsigned long)(zone->end >> PAGE_CACHE_SHIFT),
		zone);
		spin_unlock(&fs_info->reada_lock);

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