tree:   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup-writeback-20150106
head:   393b71c00e25227a020f9dbf8ffdddebac4fdf1e
commit: d3ef989a8ce459778acbb511fc03d0d85f11d4cc [86/265] fs/proc/task_mmu.c: reduce excessive indentation in clear_refs_write
config: parisc-c3000_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout d3ef989a8ce459778acbb511fc03d0d85f11d4cc
  # save the attached .config to linux build tree
  make.cross ARCH=parisc 

All warnings:

   fs/proc/task_mmu.c: In function 'clear_refs_write':
>> fs/proc/task_mmu.c:858:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
     struct clear_refs_private cp = {
     ^

vim +858 fs/proc/task_mmu.c

f248dcb34 Matt Mackall    2008-02-04  842  		return -EINVAL;
541c237c0 Pavel Emelyanov 2013-07-03  843  
541c237c0 Pavel Emelyanov 2013-07-03  844  	if (type == CLEAR_REFS_SOFT_DIRTY) {
541c237c0 Pavel Emelyanov 2013-07-03  845  		soft_dirty_cleared = true;
541c237c0 Pavel Emelyanov 2013-07-03  846  		pr_warn_once("The pagemap bits 55-60 has changed their meaning!"
c86c97ff4 Cyrill Gorcunov 2014-06-04  847  			     " See the linux/Documentation/vm/pagemap.txt for "
c86c97ff4 Cyrill Gorcunov 2014-06-04  848  			     "details.\n");
541c237c0 Pavel Emelyanov 2013-07-03  849  	}
541c237c0 Pavel Emelyanov 2013-07-03  850  
496ad9aa8 Al Viro         2013-01-23  851  	task = get_proc_task(file_inode(file));
f248dcb34 Matt Mackall    2008-02-04  852  	if (!task)
f248dcb34 Matt Mackall    2008-02-04  853  		return -ESRCH;
f248dcb34 Matt Mackall    2008-02-04  854  	mm = get_task_mm(task);
d3ef989a8 Petr Cermak     2015-01-06  855  	if (!mm)
d3ef989a8 Petr Cermak     2015-01-06  856  		goto out_task;
d3ef989a8 Petr Cermak     2015-01-06  857  
af9de7eb1 Pavel Emelyanov 2013-07-03 @858  	struct clear_refs_private cp = {
0f8975ec4 Pavel Emelyanov 2013-07-03  859  		.type = type,
af9de7eb1 Pavel Emelyanov 2013-07-03  860  	};
20cbc9726 Andrew Morton   2008-07-05  861  	struct mm_walk clear_refs_walk = {
20cbc9726 Andrew Morton   2008-07-05  862  		.pmd_entry = clear_refs_pte_range,
20cbc9726 Andrew Morton   2008-07-05  863  		.mm = mm,
af9de7eb1 Pavel Emelyanov 2013-07-03  864  		.private = &cp,
20cbc9726 Andrew Morton   2008-07-05  865  	};
b813e931b David Rientjes  2007-05-06  866  	down_read(&mm->mmap_sem);

:::::: The code at line 858 was first introduced by commit
:::::: af9de7eb180fa9b74c2cdc256349304a58c63c02 clear_refs: introduce private struct for mm_walk

:::::: TO: Pavel Emelyanov <xemul@parallels.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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