From: kernel test robot <lkp@intel.com>
To: "周琰杰 (Zhou Yanjie)" <zhouyanjie@wanyeetech.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
"Felipe Balbi" <balbi@kernel.org>,
"漆鹏振 (Qi Pengzhen)" <aric.pzqi@ingenic.com>
Subject: arch/sparc/include/asm/io_64.h:175:16: warning: 'reg' is used uninitialized in this function
Date: Sun, 16 Aug 2020 18:36:23 +0800 [thread overview]
Message-ID: <202008161819.71r2rkI8%lkp@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4b6c093e21d36bede0fd88fd0aeb3b03647260e4
commit: 2a6c0b82e65128c73b5102e00e031c5e58bb3504 USB: PHY: JZ4770: Add support for new Ingenic SoCs.
date: 3 weeks ago
config: sparc64-randconfig-r002-20200816 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
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
git checkout 2a6c0b82e65128c73b5102e00e031c5e58bb3504
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from arch/sparc/include/asm/io.h:5,
from include/linux/io.h:13,
from drivers/usb/phy/phy-jz4770.c:10:
drivers/usb/phy/phy-jz4770.c: In function 'ingenic_usb_phy_init':
>> arch/sparc/include/asm/io_64.h:175:16: warning: 'reg' is used uninitialized in this function [-Wuninitialized]
175 | #define writel writel
| ^~~~~~
drivers/usb/phy/phy-jz4770.c:161:6: note: 'reg' was declared here
161 | u32 reg;
| ^~~
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a6c0b82e65128c73b5102e00e031c5e58bb3504
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 2a6c0b82e65128c73b5102e00e031c5e58bb3504
vim +/reg +175 arch/sparc/include/asm/io_64.h
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 174
79294d7eff89f65 arch/sparc/include/asm/io_64.h Sam Ravnborg 2014-07-20 @175 #define writel writel
7c3969c3a4f3593 arch/sparc/include/asm/io_64.h Arnd Bergmann 2014-11-19 176 #define writel_relaxed writel
79294d7eff89f65 arch/sparc/include/asm/io_64.h Sam Ravnborg 2014-07-20 177 static inline void writel(u32 l, volatile void __iomem *addr)
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 178 {
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 179 __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_writel */"
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 180 : /* no outputs */
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 181 : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 182 : "memory");
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 183 }
f5e706ad886b6a5 include/asm-sparc/io_64.h Sam Ravnborg 2008-07-17 184
:::::: The code at line 175 was first introduced by commit
:::::: 79294d7eff89f65d2e58021bca81437e88fa61e3 sparc64: remove macro indirection in io_64.h
:::::: TO: Sam Ravnborg <sam@ravnborg.org>
:::::: CC: David S. Miller <davem@davemloft.net>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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reply other threads:[~2020-08-16 10:37 UTC|newest]
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