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Btrfs: fix casting error in scrub reada code

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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>
This commit is contained in:
Chris Mason 2012-02-28 12:42:44 -05:00
parent d3b010640e
commit a175423c83
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/reada.c
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@ -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);