linux-kernel - [PATCH 19/29] lib/ucs2_string: Speed up ucs2

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Date:   Fri,  9 Sep 2016 16:18:41 +0100
From:   Matt Fleming <matt@...eblueprint.co.uk>
To:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>
Cc:     Lukas Wunner <lukas@...ner.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Peter Jones <pjones@...hat.com>
Subject: [PATCH 19/29] lib/ucs2_string: Speed up ucs2_utf8size()

From: Lukas Wunner <lukas@...ner.de>

No need to calculate the string length on every loop iteration.

Signed-off-by: Lukas Wunner <lukas@...ner.de>
Cc: Peter Jones <pjones@...hat.com>
Signed-off-by: Matt Fleming <matt@...eblueprint.co.uk>
---
 lib/ucs2_string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ucs2_string.c b/lib/ucs2_string.c
index f0b323abb4c6..ae8d2491133c 100644
--- a/lib/ucs2_string.c
+++ b/lib/ucs2_string.c
@@ -56,7 +56,7 @@ ucs2_utf8size(const ucs2_char_t *src)
 	unsigned long i;
 	unsigned long j = 0;
 
-	for (i = 0; i < ucs2_strlen(src); i++) {
+	for (i = 0; src[i]; i++) {
 		u16 c = src[i];
 
 		if (c >= 0x800)
-- 
2.9.3