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| author | Cesar Eduardo Barros <cesarb@cesarb.net> | 2010-05-26 14:44:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:53 -0700 |
| commit | edcd1d843adf09d1742d49ae04fa51bb63ddd1c3 (patch) | |
| tree | 7c0af77b470531f3a5e648cca232ec5821101385 /lib | |
| parent | 9d85cba718efeef9ca00ce3f7f34f5880737aa9b (diff) | |
| download | linux-edcd1d843adf09d1742d49ae04fa51bb63ddd1c3.tar.gz linux-edcd1d843adf09d1742d49ae04fa51bb63ddd1c3.tar.bz2 linux-edcd1d843adf09d1742d49ae04fa51bb63ddd1c3.zip | |
radix-tree: fix radix_tree_prev_hole() underflow case
radix_tree_prev_hole() used LONG_MAX to detect underflow; however,
ULONG_MAX is clearly what was intended, both here and by its only user
(count_history_pages at mm/readahead.c).
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/radix-tree.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 2a087e0f9863..05da38bcc298 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -656,7 +656,7 @@ EXPORT_SYMBOL(radix_tree_next_hole); * * Returns: the index of the hole if found, otherwise returns an index * outside of the set specified (in which case 'index - return >= max_scan' - * will be true). In rare cases of wrap-around, LONG_MAX will be returned. + * will be true). In rare cases of wrap-around, ULONG_MAX will be returned. * * radix_tree_next_hole may be called under rcu_read_lock. However, like * radix_tree_gang_lookup, this will not atomically search a snapshot of @@ -674,7 +674,7 @@ unsigned long radix_tree_prev_hole(struct radix_tree_root *root, if (!radix_tree_lookup(root, index)) break; index--; - if (index == LONG_MAX) + if (index == ULONG_MAX) break; } |