linux-kernel - Re: [PATCH] target: Use WARNON_NON_RT(!irqs

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Date:   Thu, 22 Mar 2018 18:45:49 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     kbuild-all@...org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        "Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-scsi@...r.kernel.org,
        Daniel Bristot de Oliveira <daniel@...stot.me>,
        Luis Claudio R. Gonçalves 
        <lclaudio@...hat.com>, Clark Williams <williams@...hat.com>,
        target-devel@...r.kernel.org
Subject: Re: [PATCH] target: Use WARNON_NON_RT(!irqs_disabled())

Hi Arnaldo,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc6 next-20180322]
[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/Arnaldo-Carvalho-de-Melo/target-Use-WARNON_NON_RT-irqs_disabled/20180322-174549
config: i386-randconfig-s1-03221113 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/target/target_core_transport.c: In function '__transport_check_aborted_status':
>> drivers/target/target_core_transport.c:3207:2: error: implicit declaration of function 'WARN_ON_ONCE_NONRT' [-Werror=implicit-function-declaration]
     WARN_ON_ONCE_NONRT(!irqs_disabled());
     ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/WARN_ON_ONCE_NONRT +3207 drivers/target/target_core_transport.c

  3199	
  3200	static int __transport_check_aborted_status(struct se_cmd *cmd, int send_status)
  3201		__releases(&cmd->t_state_lock)
  3202		__acquires(&cmd->t_state_lock)
  3203	{
  3204		int ret;
  3205	
  3206		assert_spin_locked(&cmd->t_state_lock);
> 3207		WARN_ON_ONCE_NONRT(!irqs_disabled());
  3208	
  3209		if (!(cmd->transport_state & CMD_T_ABORTED))
  3210			return 0;
  3211		/*
  3212		 * If cmd has been aborted but either no status is to be sent or it has
  3213		 * already been sent, just return
  3214		 */
  3215		if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS)) {
  3216			if (send_status)
  3217				cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS;
  3218			return 1;
  3219		}
  3220	
  3221		pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB:"
  3222			" 0x%02x ITT: 0x%08llx\n", cmd->t_task_cdb[0], cmd->tag);
  3223	
  3224		cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS;
  3225		cmd->scsi_status = SAM_STAT_TASK_ABORTED;
  3226		trace_target_cmd_complete(cmd);
  3227	
  3228		spin_unlock_irq(&cmd->t_state_lock);
  3229		ret = cmd->se_tfo->queue_status(cmd);
  3230		if (ret)
  3231			transport_handle_queue_full(cmd, cmd->se_dev, ret, false);
  3232		spin_lock_irq(&cmd->t_state_lock);
  3233	
  3234		return 1;
  3235	}
  3236	

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