linux-kernel - Re: [PATCH printk v3 07/19] printk: Add helpers for flush type logic

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Message-ID: <202407231135.jtSVw3hi-lkp@intel.com>
Date: Tue, 23 Jul 2024 11:29:14 +0800
From: kernel test robot <lkp@...el.com>
To: John Ogness <john.ogness@...utronix.de>, Petr Mladek <pmladek@...e.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH printk v3 07/19] printk: Add helpers for flush type logic

Hi John,

kernel test robot noticed the following build errors:

[auto build test ERROR on b18703ea7157f62f02eb0ceb11f6fa0138e90adc]

url:    https://github.com/intel-lab-lkp/linux/commits/John-Ogness/printk-nbcon-Clarify-nbcon_get_default_prio-context/20240723-015154
base:   b18703ea7157f62f02eb0ceb11f6fa0138e90adc
patch link:    https://lore.kernel.org/r/20240722171939.3349410-8-john.ogness%40linutronix.de
patch subject: [PATCH printk v3 07/19] printk: Add helpers for flush type logic
config: arm-randconfig-004-20240723 (https://download.01.org/0day-ci/archive/20240723/202407231135.jtSVw3hi-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project ad154281230d83ee551e12d5be48bb956ef47ed3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240723/202407231135.jtSVw3hi-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407231135.jtSVw3hi-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/printk/printk.c:23:
   In file included from include/linux/mm.h:2253:
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from kernel/printk/printk.c:61:
>> kernel/printk/internal.h:188:26: error: call to undeclared function 'is_printk_deferred'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     188 |                         if (prefer_offload || is_printk_deferred())
         |                                               ^
   kernel/printk/internal.h:188:26: note: did you mean '_printk_deferred'?
   include/linux/printk.h:218:5: note: '_printk_deferred' declared here
     218 | int _printk_deferred(const char *s, ...)
         |     ^
   In file included from kernel/printk/printk.c:61:
   kernel/printk/internal.h:237:8: error: call to undeclared function 'is_printk_deferred'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     237 |                         if (is_printk_deferred())
         |                             ^
   1 warning and 2 errors generated.


vim +/is_printk_deferred +188 kernel/printk/internal.h

   172	
   173	/*
   174	 * Decide while console flushing methods are to be used. Used
   175	 * for all flushing except when flushing from emergency state.
   176	 *
   177	 * Set @prefer_offload to true if the context is only interested in
   178	 * offloading. Then offloading types will be set instead of direct,
   179	 * if appropriate.
   180	 */
   181	static inline void printk_get_console_flush_type(struct console_flush_type *ft, bool prefer_offload)
   182	{
   183		memset(ft, 0, sizeof(*ft));
   184	
   185		switch (nbcon_get_default_prio()) {
   186		case NBCON_PRIO_NORMAL:
   187			if (have_legacy_console || have_boot_console) {
 > 188				if (prefer_offload || is_printk_deferred())
   189					ft->legacy_offload = true;
   190				else
   191					ft->legacy_direct = true;
   192			}
   193	
   194			if (have_nbcon_console && !have_boot_console)
   195				ft->nbcon_atomic = true;
   196			break;
   197	
   198		case NBCON_PRIO_EMERGENCY:
   199			/*
   200			 * Skip. The consoles will be flushed when exiting emergency
   201			 * state. See printk_get_emergency_console_flush_type().
   202			 */
   203			break;
   204	
   205		case NBCON_PRIO_PANIC:
   206			if (have_nbcon_console && !have_boot_console)
   207				ft->nbcon_atomic = true;
   208	
   209			/*
   210			 * In panic, if nbcon atomic printing occurs, the legacy
   211			 * consoles must remain silent until explicitly allowed.
   212			 */
   213			if (legacy_allow_panic_sync || !ft->nbcon_atomic)
   214				ft->legacy_direct = true;
   215			break;
   216	
   217		default:
   218			WARN_ON_ONCE(1);
   219			break;
   220		}
   221	}
   222	

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