[kbuild-all] drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:2393:5: warning: no previous prototype for function 'mt7915_mcu_set_fixed_rate'

Hi Ryder, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5472f14a37421d1bca3dddf33cabd3bd6dbefbbc commit: 9a93364d6595358a11d07e7f4261ae263ae2a02a mt76: mt7915: rework debugfs fixed-rate knob date: 7 weeks ago config: arm64-randconfig-r026-20211214 (https://download.01.org/0day-ci/archive/20211215/202112150129.mnFkjamR-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a2ddb6c8ac29412b1361810972e15221fa021c) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 9a93364d6595358a11d07e7f4261ae263ae2a02a # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/net/wireless/mediatek/mt76/mt7915/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev, ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:2393:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev, ^ static 1 warning generated. vim +/mt7915_mcu_set_fixed_rate +2393 drivers/net/wireless/mediatek/mt76/mt7915/mcu.c e57b7901469fc0b Ryder Lee 2020-04-25 2392 9fac3c81eebd81b Ryder Lee 2020-04-25 @2393 int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev, 9fac3c81eebd81b Ryder Lee 2020-04-25 2394 struct ieee80211_sta *sta, u32 rate) 9fac3c81eebd81b Ryder Lee 2020-04-25 2395 { 9fac3c81eebd81b Ryder Lee 2020-04-25 2396 struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv; 9fac3c81eebd81b Ryder Lee 2020-04-25 2397 struct mt7915_vif *mvif = msta->vif; 9fac3c81eebd81b Ryder Lee 2020-04-25 2398 struct sta_rec_ra_fixed *ra; 9fac3c81eebd81b Ryder Lee 2020-04-25 2399 struct sk_buff *skb; 9fac3c81eebd81b Ryder Lee 2020-04-25 2400 struct tlv *tlv; 3e68af622254bad Ryder Lee 2020-05-12 2401 int len = sizeof(struct sta_req_hdr) + sizeof(*ra); 9fac3c81eebd81b Ryder Lee 2020-04-25 2402 3e68af622254bad Ryder Lee 2020-05-12 2403 skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta, len); 9fac3c81eebd81b Ryder Lee 2020-04-25 2404 if (IS_ERR(skb)) 9fac3c81eebd81b Ryder Lee 2020-04-25 2405 return PTR_ERR(skb); 9fac3c81eebd81b Ryder Lee 2020-04-25 2406 9fac3c81eebd81b Ryder Lee 2020-04-25 2407 tlv = mt7915_mcu_add_tlv(skb, STA_REC_RA_UPDATE, sizeof(*ra)); 9fac3c81eebd81b Ryder Lee 2020-04-25 2408 ra = (struct sta_rec_ra_fixed *)tlv; 9fac3c81eebd81b Ryder Lee 2020-04-25 2409 9fac3c81eebd81b Ryder Lee 2020-04-25 2410 if (!rate) { 9fac3c81eebd81b Ryder Lee 2020-04-25 2411 ra->field = cpu_to_le32(RATE_PARAM_AUTO); 9fac3c81eebd81b Ryder Lee 2020-04-25 2412 goto out; 9fac3c81eebd81b Ryder Lee 2020-04-25 2413 } 9fac3c81eebd81b Ryder Lee 2020-04-25 2414 4d2423326de9e98 Ryder Lee 2021-08-07 2415 ra->field = cpu_to_le32(RATE_PARAM_FIXED); 9fac3c81eebd81b Ryder Lee 2020-04-25 2416 ra->phy.type = FIELD_GET(RATE_CFG_PHY_TYPE, rate); 9fac3c81eebd81b Ryder Lee 2020-04-25 2417 ra->phy.bw = FIELD_GET(RATE_CFG_BW, rate); 9fac3c81eebd81b Ryder Lee 2020-04-25 2418 ra->phy.nss = FIELD_GET(RATE_CFG_NSS, rate); 9fac3c81eebd81b Ryder Lee 2020-04-25 2419 ra->phy.mcs = FIELD_GET(RATE_CFG_MCS, rate); 9fac3c81eebd81b Ryder Lee 2020-04-25 2420 ra->phy.stbc = FIELD_GET(RATE_CFG_STBC, rate); 9fac3c81eebd81b Ryder Lee 2020-04-25 2421 9fac3c81eebd81b Ryder Lee 2020-04-25 2422 if (ra->phy.bw) 9fac3c81eebd81b Ryder Lee 2020-04-25 2423 ra->phy.ldpc = 7; 9fac3c81eebd81b Ryder Lee 2020-04-25 2424 else 9fac3c81eebd81b Ryder Lee 2020-04-25 2425 ra->phy.ldpc = FIELD_GET(RATE_CFG_LDPC, rate) * 7; 9fac3c81eebd81b Ryder Lee 2020-04-25 2426 9fac3c81eebd81b Ryder Lee 2020-04-25 2427 /* HT/VHT - SGI: 1, LGI: 0; HE - SGI: 0, MGI: 1, LGI: 2 */ 4d2423326de9e98 Ryder Lee 2021-08-07 2428 if (ra->phy.type > MT_PHY_TYPE_VHT) { 4d2423326de9e98 Ryder Lee 2021-08-07 2429 ra->phy.he_ltf = FIELD_GET(RATE_CFG_HE_LTF, rate) * 85; 4d2423326de9e98 Ryder Lee 2021-08-07 2430 ra->phy.sgi = FIELD_GET(RATE_CFG_GI, rate) * 85; 4d2423326de9e98 Ryder Lee 2021-08-07 2431 } else { 4d2423326de9e98 Ryder Lee 2021-08-07 2432 ra->phy.sgi = FIELD_GET(RATE_CFG_GI, rate) * 15; 4d2423326de9e98 Ryder Lee 2021-08-07 2433 } 9fac3c81eebd81b Ryder Lee 2020-04-25 2434 9fac3c81eebd81b Ryder Lee 2020-04-25 2435 out: fa62d0e0080bca7 Felix Fietkau 2020-09-30 2436 return mt76_mcu_skb_send_msg(&dev->mt76, skb, c203dd621780842 Felix Fietkau 2021-01-06 2437 MCU_EXT_CMD(STA_REC_UPDATE), true); 9fac3c81eebd81b Ryder Lee 2020-04-25 2438 } 9fac3c81eebd81b Ryder Lee 2020-04-25 2439 :::::: The code at line 2393 was first introduced by commit :::::: 9fac3c81eebd81bbce8b050e15b03d3490841717 mt76: mt7915: set peer Tx fixed rate through debugfs :::::: TO: Ryder Lee <ryder.lee(a)mediatek.com&gt; :::::: CC: Felix Fietkau <nbd(a)nbd.name&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org