Re: [PATCH 01/19] kernel: convert sighand_struct.count from atomic_t to refcount_t

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Hi Elena,

[auto build test WARNING on next-20170220]
[cannot apply to linus/master linux/master tip/perf/core v4.9-rc8 v4.9-rc7 v4.9-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Elena-Reshetova/kernel-convert-sighand_struct-count-from-atomic_t-to-refcount_t/20170220-183434
config: blackfin-TCM-BF537_defconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
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
        # save the attached .config to linux build tree
        make.cross ARCH=blackfin 

All warnings (new ones prefixed by >>):

   In file included from include/asm-generic/bug.h:4:0,
                    from arch/blackfin/include/asm/bug.h:71,
                    from include/linux/bug.h:4,
                    from include/linux/mmdebug.h:4,
                    from include/linux/mm.h:8,
                    from fs/proc/task_nommu.c:2:
   fs/proc/task_nommu.c: In function 'task_mem':
   include/asm-generic/atomic.h:177:37: error: 'refcount_t {aka struct refcount_struct}' has no member named 'counter'
    #define atomic_read(v) READ_ONCE((v)->counter)
                                        ^
   include/linux/compiler.h:316:17: note: in definition of macro '__READ_ONCE'
     union { typeof(x) __val; char __c[1]; } __u;   \
                    ^
   include/asm-generic/atomic.h:177:24: note: in expansion of macro 'READ_ONCE'
    #define atomic_read(v) READ_ONCE((v)->counter)
                           ^~~~~~~~~
>> fs/proc/task_nommu.c:64:26: note: in expansion of macro 'atomic_read'
     if (current->sighand && atomic_read(&current->sighand->count) > 1)
                             ^~~~~~~~~~~
   include/asm-generic/atomic.h:177:37: error: 'refcount_t {aka struct refcount_struct}' has no member named 'counter'
    #define atomic_read(v) READ_ONCE((v)->counter)
                                        ^
   include/linux/compiler.h:318:22: note: in definition of macro '__READ_ONCE'
      __read_once_size(&(x), __u.__c, sizeof(x));  \
                         ^
   include/asm-generic/atomic.h:177:24: note: in expansion of macro 'READ_ONCE'
    #define atomic_read(v) READ_ONCE((v)->counter)
                           ^~~~~~~~~
>> fs/proc/task_nommu.c:64:26: note: in expansion of macro 'atomic_read'
     if (current->sighand && atomic_read(&current->sighand->count) > 1)
                             ^~~~~~~~~~~
   include/asm-generic/atomic.h:177:37: error: 'refcount_t {aka struct refcount_struct}' has no member named 'counter'
    #define atomic_read(v) READ_ONCE((v)->counter)
                                        ^
   include/linux/compiler.h:318:42: note: in definition of macro '__READ_ONCE'
      __read_once_size(&(x), __u.__c, sizeof(x));  \
                                             ^
   include/asm-generic/atomic.h:177:24: note: in expansion of macro 'READ_ONCE'
    #define atomic_read(v) READ_ONCE((v)->counter)
                           ^~~~~~~~~
>> fs/proc/task_nommu.c:64:26: note: in expansion of macro 'atomic_read'
     if (current->sighand && atomic_read(&current->sighand->count) > 1)
                             ^~~~~~~~~~~
   include/asm-generic/atomic.h:177:37: error: 'refcount_t {aka struct refcount_struct}' has no member named 'counter'
    #define atomic_read(v) READ_ONCE((v)->counter)
                                        ^
   include/linux/compiler.h:320:30: note: in definition of macro '__READ_ONCE'
      __read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
                                 ^
   include/asm-generic/atomic.h:177:24: note: in expansion of macro 'READ_ONCE'
    #define atomic_read(v) READ_ONCE((v)->counter)
                           ^~~~~~~~~
>> fs/proc/task_nommu.c:64:26: note: in expansion of macro 'atomic_read'
     if (current->sighand && atomic_read(&current->sighand->count) > 1)
                             ^~~~~~~~~~~
   include/asm-generic/atomic.h:177:37: error: 'refcount_t {aka struct refcount_struct}' has no member named 'counter'
    #define atomic_read(v) READ_ONCE((v)->counter)
                                        ^
   include/linux/compiler.h:320:50: note: in definition of macro '__READ_ONCE'
      __read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
                                                     ^
   include/asm-generic/atomic.h:177:24: note: in expansion of macro 'READ_ONCE'
    #define atomic_read(v) READ_ONCE((v)->counter)
                           ^~~~~~~~~
>> fs/proc/task_nommu.c:64:26: note: in expansion of macro 'atomic_read'
     if (current->sighand && atomic_read(&current->sighand->count) > 1)
                             ^~~~~~~~~~~

vim +/atomic_read +64 fs/proc/task_nommu.c

^1da177e Linus Torvalds    2005-04-16  48  
^1da177e Linus Torvalds    2005-04-16  49  	if (atomic_read(&mm->mm_count) > 1)
^1da177e Linus Torvalds    2005-04-16  50  		sbytes += kobjsize(mm);
^1da177e Linus Torvalds    2005-04-16  51  	else
^1da177e Linus Torvalds    2005-04-16  52  		bytes += kobjsize(mm);
^1da177e Linus Torvalds    2005-04-16  53  	
498052bb Al Viro           2009-03-30  54  	if (current->fs && current->fs->users > 1)
^1da177e Linus Torvalds    2005-04-16  55  		sbytes += kobjsize(current->fs);
^1da177e Linus Torvalds    2005-04-16  56  	else
^1da177e Linus Torvalds    2005-04-16  57  		bytes += kobjsize(current->fs);
^1da177e Linus Torvalds    2005-04-16  58  
^1da177e Linus Torvalds    2005-04-16  59  	if (current->files && atomic_read(&current->files->count) > 1)
^1da177e Linus Torvalds    2005-04-16  60  		sbytes += kobjsize(current->files);
^1da177e Linus Torvalds    2005-04-16  61  	else
^1da177e Linus Torvalds    2005-04-16  62  		bytes += kobjsize(current->files);
^1da177e Linus Torvalds    2005-04-16  63  
^1da177e Linus Torvalds    2005-04-16 @64  	if (current->sighand && atomic_read(&current->sighand->count) > 1)
^1da177e Linus Torvalds    2005-04-16  65  		sbytes += kobjsize(current->sighand);
^1da177e Linus Torvalds    2005-04-16  66  	else
^1da177e Linus Torvalds    2005-04-16  67  		bytes += kobjsize(current->sighand);
^1da177e Linus Torvalds    2005-04-16  68  
^1da177e Linus Torvalds    2005-04-16  69  	bytes += kobjsize(current); /* includes kernel stack */
^1da177e Linus Torvalds    2005-04-16  70  
df5f8314 Eric W. Biederman 2008-02-08  71  	seq_printf(m,
^1da177e Linus Torvalds    2005-04-16  72  		"Mem:\t%8lu bytes\n"

:::::: The code at line 64 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Attachment: .config.gz
Description: application/gzip


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