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Btrfs: Fix integer overflow when calculating bytes_per_bitmap

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On ppc64, bytes_per_bitmap will be (65536*8*65536). Hence append UL to
fix integer overflow.

Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Feifei Xu <xufeifei@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Feifei Xu
2016-06-01 19:18:24 +08:00
committed by David Sterba
parent 5473e0c426
commit 0ef6447a3d
2 changed files with 7 additions and 7 deletions
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2
fs/btrfs/tests/free-space-tests.c
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@@ -22,7 +22,7 @@
#include "../disk-io.h"
#include "../free-space-cache.h"
#define BITS_PER_BITMAP (PAGE_SIZE * 8)
#define BITS_PER_BITMAP (PAGE_SIZE * 8UL)
/*
* This test just does basic sanity checking, making sure we can add an extent