Re: [PATCH POC 2/4] printk: Do not block cont buffer by partially flushed lines

[kbuild test robot <lkp@intel.com>]

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Hi,

[auto build test WARNING on v4.7-rc7]
[cannot apply to next-20160715]
[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/Petr-Mladek/printk-Several-fixes-of-cont-buffer-and-console-handling/20160716-012724
config: ia64-allnoconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 4.9.0
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=ia64 

All warnings (new ones prefixed by >>):

   kernel/printk/printk.c: In function 'console_cont_flush':
   kernel/printk/printk.c:2150:11: error: 'struct cont' has no member named 'msg'
     if (!cont.msg->text_len)
              ^
>> kernel/printk/printk.c:2160:8: warning: passing argument 1 of 'cont_print_text' from incompatible pointer type
     len = cont_print_text(&cont, text, size);
           ^
   kernel/printk/printk.c:1873:15: note: expected 'char *' but argument is of type 'struct cont *'
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^
   kernel/printk/printk.c:2160:8: warning: passing argument 2 of 'cont_print_text' makes integer from pointer without a cast
     len = cont_print_text(&cont, text, size);
           ^
   kernel/printk/printk.c:1873:15: note: expected 'size_t' but argument is of type 'char *'
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^
   kernel/printk/printk.c:2160:8: error: too many arguments to function 'cont_print_text'
     len = cont_print_text(&cont, text, size);
           ^
   kernel/printk/printk.c:1873:15: note: declared here
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^
   kernel/printk/printk.c:2163:27: error: 'struct cont' has no member named 'msg'
     call_console_drivers(cont.msg->level, NULL, 0, text, len);
                              ^
   kernel/printk/printk.c: In function 'console_unlock':
   kernel/printk/printk.c:2262:7: error: 'cont_console_len' undeclared (first use in this function)
      if (cont_console_len && cont_console_seq == console_seq) {
          ^
   kernel/printk/printk.c:2262:7: note: each undeclared identifier is reported only once for each function it appears in
   kernel/printk/printk.c:2262:27: error: 'cont_console_seq' undeclared (first use in this function)
      if (cont_console_len && cont_console_seq == console_seq) {
                              ^
   kernel/printk/printk.c:2265:13: error: 'struct cont' has no member named 'owner'
       fake_cont.owner = NULL;
                ^
   kernel/printk/printk.c:2266:13: error: 'struct cont' has no member named 'msg'
       fake_cont.msg = msg;
                ^
   kernel/printk/printk.c:2267:13: error: 'struct cont' has no member named 'buf'
       fake_cont.buf = log_text(msg);
                ^
   kernel/printk/printk.c:2269:11: warning: passing argument 1 of 'cont_print_text' from incompatible pointer type
       len += cont_print_text(&fake_cont, text + len, sizeof(text) - len);
              ^
   kernel/printk/printk.c:1873:15: note: expected 'char *' but argument is of type 'struct cont *'
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^
   kernel/printk/printk.c:2269:11: warning: passing argument 2 of 'cont_print_text' makes integer from pointer without a cast
       len += cont_print_text(&fake_cont, text + len, sizeof(text) - len);
              ^
   kernel/printk/printk.c:1873:15: note: expected 'size_t' but argument is of type 'char *'
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^
   kernel/printk/printk.c:2269:11: error: too many arguments to function 'cont_print_text'
       len += cont_print_text(&fake_cont, text + len, sizeof(text) - len);
              ^
   kernel/printk/printk.c:1873:15: note: declared here
    static size_t cont_print_text(char *text, size_t size) { return 0; }
                  ^

vim +/cont_print_text +2160 kernel/printk/printk.c

  2144	{
  2145		unsigned long flags;
  2146		size_t len;
  2147	
  2148		raw_spin_lock_irqsave(&logbuf_lock, flags);
  2149	
> 2150		if (!cont.msg->text_len)
  2151			goto out;
  2152	
  2153		/*
  2154		 * If the partially printed line is already stored in
  2155		 * the ring buffer, it will be handled with the other lines.
  2156		 */
  2157		if (console_seq < log_next_seq)
  2158			goto out;
  2159	
> 2160		len = cont_print_text(&cont, text, size);
  2161		raw_spin_unlock(&logbuf_lock);
  2162		stop_critical_timings();
  2163		call_console_drivers(cont.msg->level, NULL, 0, text, len);

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

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