linux-kernel - [rcu:rcu/next 55/57] kernel/rcu/rcutorture.c:594:2: note: in expansion of macro 'pr

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Message-ID: <201703260802.IZn1xCLd%fengguang.wu@intel.com>
Date:   Sun, 26 Mar 2017 08:10:06 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:rcu/next 55/57] kernel/rcu/rcutorture.c:594:2: note: in
 expansion of macro 'pr_alert'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   cfc71fb0749122b29a70646a9a9522003418e5dc
commit: 7cf53ca0469972c1b953b68eb6a42e5d4fe75ef4 [55/57] srcutorture: Print Tiny SRCU reader statistics
config: x86_64-randconfig-x009-201713 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 7cf53ca0469972c1b953b68eb6a42e5d4fe75ef4
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:6:0,
                    from include/linux/kernel.h:13,
                    from kernel/rcu/rcutorture.c:26:
   kernel/rcu/rcutorture.c: In function 'srcu_torture_stats':
>> include/linux/kern_levels.h:4:18: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:8:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
                       ^~~~~~~~
>> include/linux/printk.h:297:9: note: in expansion of macro 'KERN_ALERT'
     printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~~~
>> kernel/rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
     pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
     ^~~~~~~~
   include/linux/kern_levels.h:4:18: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:8:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
                       ^~~~~~~~
>> include/linux/printk.h:297:9: note: in expansion of macro 'KERN_ALERT'
     printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~~~
>> kernel/rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
     pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
     ^~~~~~~~
--
   In file included from include/linux/printk.h:6:0,
                    from include/linux/kernel.h:13,
                    from kernel//rcu/rcutorture.c:26:
   kernel//rcu/rcutorture.c: In function 'srcu_torture_stats':
>> include/linux/kern_levels.h:4:18: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:8:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
                       ^~~~~~~~
>> include/linux/printk.h:297:9: note: in expansion of macro 'KERN_ALERT'
     printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~~~
   kernel//rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
     pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
     ^~~~~~~~
   include/linux/kern_levels.h:4:18: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:8:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
                       ^~~~~~~~
>> include/linux/printk.h:297:9: note: in expansion of macro 'KERN_ALERT'
     printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~~~
   kernel//rcu/rcutorture.c:594:2: note: in expansion of macro 'pr_alert'
     pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
     ^~~~~~~~

vim +/pr_alert +594 kernel/rcu/rcutorture.c

   578			/*
   579			 * Make sure that a lock is always counted if the corresponding
   580			 * unlock is counted.
   581			 */
   582			smp_rmb();
   583	
   584			l0 = counts->lock_count[!idx];
   585			l1 = counts->lock_count[idx];
   586	
   587			c0 = l0 - u0;
   588			c1 = l1 - u1;
   589			pr_cont(" %d(%ld,%ld)", cpu, c0, c1);
   590		}
   591		pr_cont("\n");
   592	#elif defined(CONFIG_TINY_SRCU)
   593		idx = READ_ONCE(srcu_ctlp->srcu_idx) & 0x1;
 > 594		pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%ld,%ld)\n",
   595			 torture_type, TORTURE_FLAG, idx,
   596			 READ_ONCE(srcu_ctlp->srcu_lock_nesting[!idx]),
   597			 READ_ONCE(srcu_ctlp->srcu_lock_nesting[idx]));
   598	#endif
   599	}
   600	
   601	static void srcu_torture_synchronize_expedited(void)
   602	{

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