linux-kernel - [PATCH][V2] drm/mgag200: make a const array static, makes object smaller

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Date:   Thu,  4 Feb 2021 19:11:56 +0000
From:   Colin King <colin.king@...onical.com>
To:     Dave Airlie <airlied@...hat.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][V2] drm/mgag200: make a const array static, makes object smaller

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

Don't populate the const array m_div_val on the stack but instead make
it static. Makes the object code smaller by 29 bytes:

Before:
   text	   data	  bss   dec    hex filename
  34736	   4552	    0 39288   9978 drivers/gpu/drm/mgag200/mgag200_mode.o

After:
   text	   data	  bss   dec    hex filename
  34625	   4616	    0 39241   9949 drivers/gpu/drm/mgag200/mgag200_mode.o

(gcc version 10.2.0)

Signed-off-by: Colin Ian King <colin.king@...onical.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
---

V2: move static declaration to the top of the declarations

---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 1dfc42170059..c3dfde8cad25 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -706,13 +706,13 @@ static int mga_g200eh_set_plls(struct mga_device *mdev, long clock)
 
 static int mga_g200er_set_plls(struct mga_device *mdev, long clock)
 {
+	static const unsigned int m_div_val[] = { 1, 2, 4, 8 };
 	unsigned int vcomax, vcomin, pllreffreq;
 	unsigned int delta, tmpdelta;
 	int testr, testn, testm, testo;
 	unsigned int p, m, n;
 	unsigned int computed, vco;
 	int tmp;
-	const unsigned int m_div_val[] = { 1, 2, 4, 8 };
 
 	m = n = p = 0;
 	vcomax = 1488000;
-- 
2.29.2