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Subject[PATCH] rtlwifi: rtl8821ae: make array static const and remove redundant assignment
Date
From: Colin Ian King <colin.king@canonical.com>

The array channel_all can be make static const rather than populating
it on the stack, this makes the code smaller. Also, variable place
is being initialized with a value that is never read, so this assignment
is redundant and can be removed.

Before:
text data bss dec hex filename
118537 9591 0 128128 1f480 realtek/rtlwifi/rtl8821ae/phy.o

After:
text data bss dec hex filename
118331 9687 0 128018 1f412 realtek/rtlwifi/rtl8821ae/phy.o

Saves 110 bytes, (gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
index 408af144098e..979e434a4e73 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c
@@ -3613,14 +3613,14 @@ u8 rtl8821ae_phy_sw_chnl(struct ieee80211_hw *hw)

u8 _rtl8812ae_get_right_chnl_place_for_iqk(u8 chnl)
{
- u8 channel_all[TARGET_CHNL_NUM_2G_5G_8812] = {
+ static const u8 channel_all[TARGET_CHNL_NUM_2G_5G_8812] = {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
14, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54,
56, 58, 60, 62, 64, 100, 102, 104, 106, 108,
110, 112, 114, 116, 118, 120, 122, 124, 126,
128, 130, 132, 134, 136, 138, 140, 149, 151,
153, 155, 157, 159, 161, 163, 165};
- u8 place = chnl;
+ u8 place;

if (chnl > 14) {
for (place = 14; place < sizeof(channel_all); place++)
--
2.20.1
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