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Message-ID: <202210130006.aKq8r63O-lkp@intel.com>
Date:   Thu, 13 Oct 2022 00:19:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: drivers/net/ethernet/ti/cpmac.c:1168:5: warning: no previous
 prototype for function 'cpmac_init'

Hi Paul,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   49da070062390094112b423ba443ea193527b2e4
commit: c434b9f80b0923e6460031b0fd964f8b0bf3c6a6 MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbol
date:   2 years, 1 month ago
config: mips-randconfig-r015-20221012
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/net/ethernet/ti/ scripts/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/ti/cpmac.c:1168:5: warning: no previous prototype for function 'cpmac_init' [-Wmissing-prototypes]
   int cpmac_init(void)
       ^
   drivers/net/ethernet/ti/cpmac.c:1168:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int cpmac_init(void)
   ^
   static 
>> drivers/net/ethernet/ti/cpmac.c:1238:6: warning: no previous prototype for function 'cpmac_exit' [-Wmissing-prototypes]
   void cpmac_exit(void)
        ^
   drivers/net/ethernet/ti/cpmac.c:1238:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void cpmac_exit(void)
   ^
   static 
   2 warnings generated.


vim +/cpmac_init +1168 drivers/net/ethernet/ti/cpmac.c

d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1167  
f57ae66ee548642 drivers/net/ethernet/ti/cpmac.c Bill Pemberton    2012-12-03 @1168  int cpmac_init(void)
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1169  {
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1170  	u32 mask;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1171  	int i, res;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1172  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1173  	cpmac_mii = mdiobus_alloc();
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1174  	if (cpmac_mii == NULL)
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1175  		return -ENOMEM;
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1176  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1177  	cpmac_mii->name = "cpmac-mii";
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1178  	cpmac_mii->read = cpmac_mdio_read;
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1179  	cpmac_mii->write = cpmac_mdio_write;
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1180  	cpmac_mii->reset = cpmac_mdio_reset;
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1181  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1182  	cpmac_mii->priv = ioremap(AR7_REGS_MDIO, 256);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1183  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1184  	if (!cpmac_mii->priv) {
f160a2d0b524eee drivers/net/ethernet/ti/cpmac.c Varka Bhadram     2014-07-10  1185  		pr_err("Can't ioremap mdio registers\n");
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1186  		res = -ENXIO;
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1187  		goto fail_alloc;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1188  	}
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1189  
d43e6fb4ac4abfe drivers/net/ethernet/ti/cpmac.c Arnd Bergmann     2017-01-16  1190  	/* FIXME: unhardcode gpio&reset bits */
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1191  	ar7_gpio_disable(26);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1192  	ar7_gpio_disable(27);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1193  	ar7_device_reset(AR7_RESET_BIT_CPMAC_LO);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1194  	ar7_device_reset(AR7_RESET_BIT_CPMAC_HI);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1195  	ar7_device_reset(AR7_RESET_BIT_EPHY);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1196  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1197  	cpmac_mii->reset(cpmac_mii);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1198  
559764d1996e6ae drivers/net/cpmac.c             Florian Fainelli  2010-08-08  1199  	for (i = 0; i < 300; i++) {
559764d1996e6ae drivers/net/cpmac.c             Florian Fainelli  2010-08-08  1200  		mask = cpmac_read(cpmac_mii->priv, CPMAC_MDIO_ALIVE);
559764d1996e6ae drivers/net/cpmac.c             Florian Fainelli  2010-08-08  1201  		if (mask)
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1202  			break;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1203  		else
e4540aa94f9b3e7 drivers/net/cpmac.c             Florian Fainelli  2009-08-04  1204  			msleep(10);
559764d1996e6ae drivers/net/cpmac.c             Florian Fainelli  2010-08-08  1205  	}
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1206  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1207  	mask &= 0x7fffffff;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1208  	if (mask & (mask - 1)) {
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1209  		external_switch = 1;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1210  		mask = 0;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1211  	}
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1212  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1213  	cpmac_mii->phy_mask = ~(mask | 0x80000000);
d1733f078b1b377 drivers/net/ethernet/ti/cpmac.c Florian Fainelli  2012-01-09  1214  	snprintf(cpmac_mii->id, MII_BUS_ID_SIZE, "cpmac-1");
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1215  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1216  	res = mdiobus_register(cpmac_mii);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1217  	if (res)
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1218  		goto fail_mii;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1219  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1220  	res = platform_driver_register(&cpmac_driver);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1221  	if (res)
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1222  		goto fail_cpmac;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1223  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1224  	return 0;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1225  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1226  fail_cpmac:
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1227  	mdiobus_unregister(cpmac_mii);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1228  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1229  fail_mii:
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1230  	iounmap(cpmac_mii->priv);
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1231  
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1232  fail_alloc:
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1233  	mdiobus_free(cpmac_mii);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1234  
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1235  	return res;
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1236  }
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1237  
f57ae66ee548642 drivers/net/ethernet/ti/cpmac.c Bill Pemberton    2012-12-03 @1238  void cpmac_exit(void)
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1239  {
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1240  	platform_driver_unregister(&cpmac_driver);
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1241  	mdiobus_unregister(cpmac_mii);
298cf9beb967952 drivers/net/cpmac.c             Lennert Buytenhek 2008-10-08  1242  	iounmap(cpmac_mii->priv);
48a29516e8b0b8c drivers/net/cpmac.c             Dan Carpenter     2010-03-02  1243  	mdiobus_free(cpmac_mii);
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1244  }
d95b39c3909237a drivers/net/cpmac.c             Matteo Croce      2007-10-14  1245  

:::::: The code at line 1168 was first introduced by commit
:::::: f57ae66ee5486426fc86ed46f97c5e15792c8535 cpmac: remove __dev* attributes

:::::: TO: Bill Pemberton <wfp5p@...ginia.edu>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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