linux-kernel - [rt-devel:linux-5.18.y-rt-rebase 17/78] kernel/printk/printk.c:3187:14: warning: variable 'any

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Date:   Sat, 23 Apr 2022 04:18:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [rt-devel:linux-5.18.y-rt-rebase 17/78]
 kernel/printk/printk.c:3187:14: warning: variable 'any_usable' set but not
 used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.18.y-rt-rebase
head:   03e7725ddbfb0ffd7f3d7b257bfa504c6f795f6b
commit: 72b5c1227b73b2cde1452cfc58717cff442ed473 [17/78] serial: 8250: implement write_atomic
config: x86_64-randconfig-a015 (https://download.01.org/0day-ci/archive/20220423/202204230430.85I2TCOI-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=72b5c1227b73b2cde1452cfc58717cff442ed473
        git remote add rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
        git fetch --no-tags rt-devel linux-5.18.y-rt-rebase
        git checkout 72b5c1227b73b2cde1452cfc58717cff442ed473
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/printk/

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

All warnings (new ones prefixed by >>):

   kernel/printk/printk.c: In function 'atomic_console_flush_all':
>> kernel/printk/printk.c:3187:14: warning: variable 'any_usable' set but not used [-Wunused-but-set-variable]
    3187 |         bool any_usable = false;
         |              ^~~~~~~~~~


vim +/any_usable +3187 kernel/printk/printk.c

fe3d8ad31cf51b kernel/printk.c        Feng Tang   2011-03-22  3180  
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3181  #ifdef CONFIG_HAVE_ATOMIC_CONSOLE
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3182  static bool console_emit_next_record(struct console *con, char *text, char *ext_text,
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3183  				     char *dropped_text, bool atomic_printing);
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3184  
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3185  static void atomic_console_flush_all(void)
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3186  {
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04 @3187  	bool any_usable = false;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3188  	unsigned long flags;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3189  	struct console *con;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3190  	bool any_progress;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3191  	int index = 0;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3192  
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3193  	if (console_suspended)
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3194  		return;
943b66638a0519 kernel/printk/printk.c John Ogness 2022-02-04  3195  

:::::: The code at line 3187 was first introduced by commit
:::::: 943b66638a0519612cdc25dcb07f59af89d37407 printk: add infrastucture for atomic consoles

:::::: TO: John Ogness <john.ogness@...utronix.de>
:::::: CC: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp