From 90d835507581324d0449f1ded4f56a8b16f20bf7 Mon Sep 17 00:00:00 2001
From: xiusir <xiusir@qq.com>
Date: Tue, 28 Feb 2017 10:29:44 -0800
Subject: [PATCH] Fix the wrong address for PREFETCH in DynamicBloom::Prefetch

Summary:
- Change data_[b] to data_[b / 8] in DynamicBloom::Prefetch, as b means the b-th bit in data_ and data_[b / 8] is the proper byte in data_.
Closes https://github.com/facebook/rocksdb/pull/1935

Differential Revision: D4628696

Pulled By: siying

fbshipit-source-id: bc5a0c6
---
 util/dynamic_bloom.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/dynamic_bloom.h b/util/dynamic_bloom.h
index 909db54c8..3418e9295 100644
--- a/util/dynamic_bloom.h
+++ b/util/dynamic_bloom.h
@@ -128,7 +128,7 @@ inline bool DynamicBloom::MayContain(const Slice& key) const {
 inline void DynamicBloom::Prefetch(uint32_t h) {
   if (kNumBlocks != 0) {
     uint32_t b = ((h >> 11 | (h << 21)) % kNumBlocks) * (CACHE_LINE_SIZE * 8);
-    PREFETCH(&(data_[b]), 0, 3);
+    PREFETCH(&(data_[b / 8]), 0, 3);
   }
 }