[jirislaby:devel 77/98] drivers/block/xen-blkfront.c:280:9: sparse: sparse: too long token expansion

[jirislaby:devel 77/98] drivers/block/xen-blkfront.c:280:9: sparse: sparse: too long token expansion

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: Jiri Slaby <jslaby@suse.cz>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
head:   1494092ef6d50f60cf63d298959874e1f653e4a1
commit: d0b9e71824ebadc9e9516b7a5cfa028068011fed [77/98] include condition in the BUG_ON/WARN_ON output
:::::: branch date: 5 hours ago
:::::: commit date: 5 hours ago
config: x86_64-randconfig-s021-20210215 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commit/?id=d0b9e71824ebadc9e9516b7a5cfa028068011fed
        git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
        git fetch --no-tags jirislaby devel
        git checkout d0b9e71824ebadc9e9516b7a5cfa028068011fed
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/block/xen-blkfront.c:280:9: sparse: sparse: too long token expansion

vim +280 drivers/block/xen-blkfront.c

4ab50af63d2eb5 Juergen Gross       2020-03-05  275  
81f35161577236 Bob Liu             2015-11-14  276  static int get_id_from_freelist(struct blkfront_ring_info *rinfo)
9f27ee59503865 Jeremy Fitzhardinge 2007-07-17  277  {
81f35161577236 Bob Liu             2015-11-14  278  	unsigned long free = rinfo->shadow_free;
81f35161577236 Bob Liu             2015-11-14  279  
81f35161577236 Bob Liu             2015-11-14 @280  	BUG_ON(free >= BLK_RING_SIZE(rinfo->dev_info));
81f35161577236 Bob Liu             2015-11-14  281  	rinfo->shadow_free = rinfo->shadow[free].req.u.rw.id;
81f35161577236 Bob Liu             2015-11-14  282  	rinfo->shadow[free].req.u.rw.id = 0x0fffffee; /* debug */
9f27ee59503865 Jeremy Fitzhardinge 2007-07-17  283  	return free;
9f27ee59503865 Jeremy Fitzhardinge 2007-07-17  284  }
9f27ee59503865 Jeremy Fitzhardinge 2007-07-17  285  

:::::: The code at line 280 was first introduced by commit
:::::: 81f351615772365d46ceeac3e50c9dd4e8f9dc89 xen/blkfront: separate per ring information out of device info

:::::: TO: Bob Liu <bob.liu@oracle.com>
:::::: CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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