Precalculate "32 - d_cache_shift".
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
fs/dcache.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -106,7 +106,7 @@ 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
@@ -3560,6 +3560,8 @@ static void __init dcache_init_early(void)
for (loop = 0; loop < (1U << d_hash_shift); loop++)
INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
+
+ d_hash_shift = 32 - d_hash_shift;
}
static void __init dcache_init(void)
@@ -3591,6 +3593,8 @@ static void __init dcache_init(void)
for (loop = 0; loop < (1U << d_hash_shift); loop++)
INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
+
+ d_hash_shift = 32 - d_hash_shift;
}
/* SLAB cache for __getname() consumers */
--
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