From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Mon, 20 Nov 2017 15:05:07 +0000 (+0300)
Subject: dcache: subtract d_hash_shift from 32 in advance
X-Git-Tag: v4.16-rc1~145^2~4
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=854d3e63438d72cde8296a4c4564898c5f9dd01a;p=uclinux-h8%2Flinux.git

dcache: subtract d_hash_shift from 32 in advance

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/dcache.c b/fs/dcache.c
index 17e6b84b9656..d4f5b52d99be 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -110,7 +110,7 @@ static struct hlist_bl_head *dentry_hashtable __read_mostly;
 
 static inline struct hlist_bl_head *d_hash(unsigned int hash)
 {
-	return dentry_hashtable + (hash >> (32 - d_hash_shift));
+	return dentry_hashtable + (hash >> d_hash_shift);
 }
 
 #define IN_LOOKUP_SHIFT 10
@@ -3593,6 +3593,7 @@ static void __init dcache_init_early(void)
 					&d_hash_mask,
 					0,
 					0);
+	d_hash_shift = 32 - d_hash_shift;
 }
 
 static void __init dcache_init(void)
@@ -3619,6 +3620,7 @@ static void __init dcache_init(void)
 					&d_hash_mask,
 					0,
 					0);
+	d_hash_shift = 32 - d_hash_shift;
 }
 
 /* SLAB cache for __getname() consumers */