mm: memcg: group swapped-out statistics counter logically

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index e70ebab..c651f02 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -16,6 +16,7 @@
 
 #include <linux/init.h>
 #include <linux/export.h>
+#include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/namei.h>
@@ -1451,7 +1452,8 @@ EXPORT_SYMBOL(full_name_hash);
  */
 static inline unsigned long hash_name(const char *name, unsigned int *hashp)
 {
-       unsigned long a, mask, hash, len;
+       unsigned long a, b, adata, bdata, mask, hash, len;
+       const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS;
 
        hash = a = 0;
        len = -sizeof(unsigned long);
@@ -1459,17 +1461,18 @@ static inline unsigned long hash_name(const char *name, unsigned int *hashp)
                hash = (hash + a) * 9;
                len += sizeof(unsigned long);
                a = load_unaligned_zeropad(name+len);
-               /* Do we have any NUL or '/' bytes in this word? */
-               mask = has_zero(a) | has_zero(a ^ REPEAT_BYTE('/'));
-       } while (!mask);
-
-       /* The mask *below* the first high bit set */
-       mask = (mask - 1) & ~mask;
-       mask >>= 7;
-       hash += a & mask;
+               b = a ^ REPEAT_BYTE('/');
+       } while (!(has_zero(a, &adata, &constants) | has_zero(b, &bdata, &constants)));
+
+       adata = prep_zero_mask(a, adata, &constants);
+       bdata = prep_zero_mask(b, bdata, &constants);
+
+       mask = create_zero_mask(adata | bdata);
+
+       hash += a & zero_bytemask(mask);
        *hashp = fold_hash(hash);
 
-       return len + count_masked_bytes(mask);
+       return len + find_zero(mask);
 }
 
 #else