hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS

The self-test was updated to cover zero-length strings; the function
needs to be updated, too.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 47edc9981298..4c4f95ac8aa5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1968,11 +1968,11 @@ u64 hashlen_string(const char *name)
         unsigned long len = 0, c;
 
         c = (unsigned char)*name;
-        do {
+        while (c) {
                 len++;
                 hash = partial_name_hash(c, hash);
                 c = (unsigned char)name[len];
-        } while (c);
+        }
         return hashlen_create(end_name_hash(hash), len);
 }
 EXPORT_SYMBOL(hashlen_string);