linux-kernel - [PATCH] pinctrl: single: make two arrays static const, reduces object code size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170919144218.23607-1-colin.king@canonical.com>
Date:   Tue, 19 Sep 2017 15:42:18 +0100
From:   Colin King <colin.king@...onical.com>
To:     Tony Lindgren <tony@...mide.com>,
        Haojian Zhuang <haojian.zhuang@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-gpio@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pinctrl: single: make two arrays static const, reduces object code size

From: Colin Ian King <colin.king@...onical.com>

Don't populate the read-only arrays prop2 and prop4 on the stack, instead
make them static const.  Makes the object code smaller by over 230 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  28235	   5820	    192	  34247	   85c7	drivers/pinctrl/pinctrl-single.o

After:
   text	   data	    bss	    dec	    hex	filename
  27839	   5980	    192	  34011	   84db	drivers/pinctrl/pinctrl-single.o

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/pinctrl/pinctrl-single.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index b8b3d932cd73..e6cd8de793e2 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -873,13 +873,13 @@ static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np,
 	int i = 0, nconfs = 0;
 	unsigned long *settings = NULL, *s = NULL;
 	struct pcs_conf_vals *conf = NULL;
-	struct pcs_conf_type prop2[] = {
+	static const struct pcs_conf_type prop2[] = {
 		{ "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, },
 		{ "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, },
 		{ "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, },
 		{ "pinctrl-single,low-power-mode", PIN_CONFIG_LOW_POWER_MODE, },
 	};
-	struct pcs_conf_type prop4[] = {
+	static const struct pcs_conf_type prop4[] = {
 		{ "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, },
 		{ "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, },
 		{ "pinctrl-single,input-schmitt-enable",
-- 
2.14.1