linux-kernel - [PATCH] staging: rtl8723bs: core: make array op

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 for Android: free password hash cracker in your pocket

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

Date:   Fri,  6 Sep 2019 18:50:21 +0100
From:   Colin King <colin.king@...onical.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: rtl8723bs: core: make array op_class static const, makes object smaller

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

Don't populate the array op_class on the stack but instead make it
static const. Makes the object code smaller by 64 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  93553	   7944	   5056	 106553	  1a039	rtl8723bs/core/rtw_mlme_ext.o

After:
   text	   data	    bss	    dec	    hex	filename
  93425	   8008	   5056	 106489	  19ff9	rtl8723bs/core/rtw_mlme_ext.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/staging/rtl8723bs/core/rtw_mlme_ext.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
index 2128886c9924..814b7a6bf4ea 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
@@ -344,7 +344,7 @@ static void init_channel_list(struct adapter *padapter, RT_CHANNEL_INFO *channel
 							  struct p2p_channels *channel_list)
 {
 
-	struct p2p_oper_class_map op_class[] = {
+	static const struct p2p_oper_class_map op_class[] = {
 		{ IEEE80211G,  81,   1,  13,  1, BW20 },
 		{ IEEE80211G,  82,  14,  14,  1, BW20 },
 		{ IEEE80211A, 115,  36,  48,  4, BW20 },
@@ -363,7 +363,7 @@ static void init_channel_list(struct adapter *padapter, RT_CHANNEL_INFO *channel
 
 	for (op = 0; op_class[op].op_class; op++) {
 		u8 ch;
-		struct p2p_oper_class_map *o = &op_class[op];
+		const struct p2p_oper_class_map *o = &op_class[op];
 		struct p2p_reg_class *reg = NULL;
 
 		for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) {
-- 
2.20.1