* [linux-next:master 10309/11059] drivers/iommu/fsl_pamu_domain.c:129:5: warning: variable 'i' is uninitialized when used here
@ 2021-04-09 7:52 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-04-09 7:52 UTC (permalink / raw)
To: Christoph Hellwig
Cc: kbuild-all, clang-built-linux, Linux Memory Management List,
Joerg Roedel
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 6145d80cfc62e3ed8f16ff584d6287e6d88b82b9
commit: ba58d1216e2b2d2320b50591b767f50b13c623a8 [10309/11059] iommu/fsl_pamu: remove support for multiple windows
config: powerpc64-randconfig-r002-20210409 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project dd453a1389b6a7e6d9214b449d3c54981b1a89b6)
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 powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ba58d1216e2b2d2320b50591b767f50b13c623a8
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout ba58d1216e2b2d2320b50591b767f50b13c623a8
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
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 >>):
>> drivers/iommu/fsl_pamu_domain.c:129:5: warning: variable 'i' is uninitialized when used here [-Wuninitialized]
i, liodn);
^
include/linux/printk.h:424:26: note: expanded from macro 'pr_debug'
dynamic_pr_debug(fmt, ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:158:22: note: expanded from macro 'dynamic_pr_debug'
pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:147:56: note: expanded from macro '_dynamic_func_call'
__dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/dynamic_debug.h:129:15: note: expanded from macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
drivers/iommu/fsl_pamu_domain.c:122:16: note: initialize the variable 'i' to silence this warning
int ret = 0, i;
^
= 0
1 warning generated.
vim +/i +129 drivers/iommu/fsl_pamu_domain.c
695093e38c3ef6 Varun Sethi 2013-07-15 118
695093e38c3ef6 Varun Sethi 2013-07-15 119 static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain,
695093e38c3ef6 Varun Sethi 2013-07-15 120 u32 val)
695093e38c3ef6 Varun Sethi 2013-07-15 121 {
695093e38c3ef6 Varun Sethi 2013-07-15 122 int ret = 0, i;
695093e38c3ef6 Varun Sethi 2013-07-15 123 unsigned long flags;
695093e38c3ef6 Varun Sethi 2013-07-15 124
695093e38c3ef6 Varun Sethi 2013-07-15 125 spin_lock_irqsave(&iommu_lock, flags);
ba58d1216e2b2d Christoph Hellwig 2021-04-01 126 ret = pamu_update_paace_stash(liodn, val);
695093e38c3ef6 Varun Sethi 2013-07-15 127 if (ret) {
cd70d4659ff3ab Emil Medve 2015-01-28 128 pr_debug("Failed to update SPAACE %d field for liodn %d\n ",
cd70d4659ff3ab Emil Medve 2015-01-28 @129 i, liodn);
695093e38c3ef6 Varun Sethi 2013-07-15 130 spin_unlock_irqrestore(&iommu_lock, flags);
695093e38c3ef6 Varun Sethi 2013-07-15 131 return ret;
695093e38c3ef6 Varun Sethi 2013-07-15 132 }
695093e38c3ef6 Varun Sethi 2013-07-15 133
695093e38c3ef6 Varun Sethi 2013-07-15 134 spin_unlock_irqrestore(&iommu_lock, flags);
695093e38c3ef6 Varun Sethi 2013-07-15 135
695093e38c3ef6 Varun Sethi 2013-07-15 136 return ret;
695093e38c3ef6 Varun Sethi 2013-07-15 137 }
695093e38c3ef6 Varun Sethi 2013-07-15 138
:::::: The code at line 129 was first introduced by commit
:::::: cd70d4659ff3ab7e25b29a6f70be5bcfd078db1f iommu/fsl: Various cleanups
:::::: TO: Emil Medve <Emilian.Medve@Freescale.com>
:::::: CC: Joerg Roedel <jroedel@suse.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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