linux-kernel - [PATCH] regulator: lp8788-ldo: make array en_mask static const, makes object smaller

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Message-Id: <20190906130632.6709-1-colin.king@canonical.com>
Date:   Fri,  6 Sep 2019 14:06:32 +0100
From:   Colin King <colin.king@...onical.com>
To:     Milo Kim <milo.kim@...com>, Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: lp8788-ldo: make array en_mask static const, makes object smaller

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

Don't populate the array en_mask on the stack but instead make it
static const. Makes the object code smaller by 87 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  12967	   3408	      0	  16375	   3ff7	drivers/regulator/lp8788-ldo.o

After:
   text	   data	    bss	    dec	    hex	filename
  12816	   3472	      0	  16288	   3fa0	drivers/regulator/lp8788-ldo.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/regulator/lp8788-ldo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c
index 1b00f3638996..00e9bb92c326 100644
--- a/drivers/regulator/lp8788-ldo.c
+++ b/drivers/regulator/lp8788-ldo.c
@@ -464,7 +464,7 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 {
 	struct lp8788 *lp = ldo->lp;
 	enum lp8788_ext_ldo_en_id enable_id;
-	u8 en_mask[] = {
+	static const u8 en_mask[] = {
 		[EN_ALDO1]   = LP8788_EN_SEL_ALDO1_M,
 		[EN_ALDO234] = LP8788_EN_SEL_ALDO234_M,
 		[EN_ALDO5]   = LP8788_EN_SEL_ALDO5_M,
-- 
2.20.1