cached_block::Compare() was ignoring the upper 32 bit of the block

number. Was a problem only for partitions > 2^32 * block size (4TB
for 1KB blocks).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24393 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/cache/block_cache.cpp

@@ -296,7 +296,11 @@ cached_block::Compare(void *_cacheEntry, const void *_block)
 	cached_block *cacheEntry = (cached_block *)_cacheEntry;
 	const off_t *block = (const off_t *)_block;
 
-	return cacheEntry->block_number - *block;
+	off_t diff = cacheEntry->block_number - *block;
+	if (diff > 0)
+		return 1;
+
+	return diff < 0 ? -1 : 0;	
 }