linux-kernel - fs/smb/client/ioctl.c:324:10: warning: variable 'caps' set but not used

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Message-ID: <202305271421.pwX0wfIT-lkp@intel.com>
Date:   Sat, 27 May 2023 14:21:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Steve French <stfrench@...rosoft.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: fs/smb/client/ioctl.c:324:10: warning: variable 'caps' set but not
 used

Hi Steve,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   49572d5361298711207ab387a6c318407deb963a
commit: 38c8a9a52082579090e34c033d439ed2cd1a462d smb: move client and server files to common directory fs/smb
date:   2 days ago
config: i386-randconfig-i054-20230527 (https://download.01.org/0day-ci/archive/20230527/202305271421.pwX0wfIT-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=38c8a9a52082579090e34c033d439ed2cd1a462d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 38c8a9a52082579090e34c033d439ed2cd1a462d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/smb/client/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305271421.pwX0wfIT-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/smb/client/ioctl.c:324:10: warning: variable 'caps' set but not used [-Wunused-but-set-variable]
           __u64   caps;
                   ^
   1 warning generated.


vim +/caps +324 fs/smb/client/ioctl.c

7ba3d1cdb7988c fs/cifs/ioctl.c Steve French    2021-05-02  312  
f9ddcca4cf7d95 fs/cifs/ioctl.c Steve French    2008-05-15  313  long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
^1da177e4c3f41 fs/cifs/ioctl.c Linus Torvalds  2005-04-16  314  {
496ad9aa8ef448 fs/cifs/ioctl.c Al Viro         2013-01-23  315  	struct inode *inode = file_inode(filep);
7e7db86c7e1088 fs/cifs/ioctl.c Steve French    2019-09-19  316  	struct smb3_key_debug_info pkey_inf;
^1da177e4c3f41 fs/cifs/ioctl.c Linus Torvalds  2005-04-16  317  	int rc = -ENOTTY; /* strange error - but the precedent */
6d5786a34d98bf fs/cifs/ioctl.c Pavel Shilovsky 2012-06-20  318  	unsigned int xid;
ba00ba64cf0895 fs/cifs/ioctl.c Jeff Layton     2010-09-20  319  	struct cifsFileInfo *pSMBFile = filep->private_data;
96daf2b09178d8 fs/cifs/ioctl.c Steve French    2011-05-27  320  	struct cifs_tcon *tcon;
a77592a70081ed fs/cifs/ioctl.c Ronnie Sahlberg 2020-07-09  321  	struct tcon_link *tlink;
d26c2ddd335696 fs/cifs/ioctl.c Steve French    2020-02-06  322  	struct cifs_sb_info *cifs_sb;
f654bac2227adc fs/cifs/ioctl.c Steve French    2005-04-28  323  	__u64	ExtAttrBits = 0;
618763958b2291 fs/cifs/ioctl.c Jeff Layton     2010-11-08 @324  	__u64   caps;

:::::: The code at line 324 was first introduced by commit
:::::: 618763958b2291a09057dbfa553da6ded93dcfad cifs: make cifs_ioctl handle NULL filp->private_data correctly

:::::: TO: Jeff Layton <jlayton@...hat.com>
:::::: CC: Steve French <sfrench@...ibm.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki