linux-kernel - [PROBLEM linux-next] drivers/mux/adg792a.c:134:34: error: ‘adg792a_of_match’ defined but not used [-Werror=unused-const-variable=]

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Message-ID: <27abdc76-37ea-4566-8e1a-ad64ee97344b@gmail.com>
Date: Tue, 9 Jul 2024 23:28:25 +0200
From: Mirsad Todorovac <mtodorovac69@...il.com>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc: "Kashyap, Desai" <kashyap.desai@....com>, Eric Moore
 <eric.moore@...l.com>, Sathya Prakash <sathya.prakash@...adcom.com>,
 Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
 Suganath Prabu Subramani <suganath-prabu.subramani@...adcom.com>,
 MPT-FusionLinux.pdl@...adcom.com, linux-scsi@...r.kernel.org
Subject: [PROBLEM linux-next] drivers/mux/adg792a.c:134:34: error: ‘adg792a_of_match’ defined but not used [-Werror=unused-const-variable=]

Dear all,

On the linux-next vanilla next-20240709 tree, I have attempted the seed KCONFIG_SEED=0xEE7AB52F
which was known from before to trigger various errors in compile and build process.

Though this might seem as contributing to channel noise, Linux refuses to build this config,
treating warnings as errors, using this build line:

$ time nice make W=1 -k -j 36 |& tee ../err-next-20230709-01a.log; date

As I know that the Chief Penguin doesn't like warnings, but I am also aware that there are plenty
left, there seems to be more tedious work ahead to make the compilers happy.

The compiler output is:

drivers/message/fusion/mptsas.c: In function ‘mptsas_reprobe_lun’:
drivers/message/fusion/mptsas.c:4234:13: error: variable ‘rc’ set but not used [-Werror=unused-but-set-variable]
 4234 |         int rc;
      |             ^~
drivers/message/fusion/mptsas.c: In function ‘mptsas_issue_tm’:
drivers/message/fusion/mptsas.c:4793:26: error: variable ‘timeleft’ set but not used [-Werror=unused-but-set-variable]
 4793 |         unsigned long    timeleft;
      |                          ^~~~~~~~

4230 
4231 static void
4232 mptsas_reprobe_lun(struct scsi_device *sdev, void *data)
4233 {
4234 →       int rc;
4235 
4236         sdev->no_uld_attach = data ? 1 : 0;
4237 →       rc = scsi_device_reprobe(sdev);
4238 }
4239 

4787 mptsas_issue_tm(MPT_ADAPTER *ioc, u8 type, u8 channel, u8 id, u64 lun,
4788         int task_context, ulong timeout, u8 *issue_reset)
4789 {
4790         MPT_FRAME_HDR   *mf;
4791         SCSITaskMgmt_t  *pScsiTm;
4792         int              retval;
4793 →       unsigned long    timeleft;
4794 
4795         *issue_reset = 0;
4796         mf = mpt_get_msg_frame(mptsasDeviceResetCtx, ioc);
4797         if (mf == NULL) {
4798                 retval = -1; /* return failure */
4799                 dtmprintk(ioc, printk(MYIOC_s_WARN_FMT "TaskMgmt request: no "
4800                     "msg frames!!\n", ioc->name));
4801                 goto out;
4802         }
4803 
4804         dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT "TaskMgmt request: mr = %p, "
4805             "task_type = 0x%02X,\n\t timeout = %ld, fw_channel = %d, "
4806             "fw_id = %d, lun = %lld,\n\t task_context = 0x%x\n", ioc->name, mf,
4807              type, timeout, channel, id, (unsigned long long)lun,
4808              task_context));
4809 
4810         pScsiTm = (SCSITaskMgmt_t *) mf;
4811         memset(pScsiTm, 0, sizeof(SCSITaskMgmt_t));
4812         pScsiTm->Function = MPI_FUNCTION_SCSI_TASK_MGMT;
4813         pScsiTm->TaskType = type;
4814         pScsiTm->MsgFlags = 0;
4815         pScsiTm->TargetID = id;
4816         pScsiTm->Bus = channel;
4817         pScsiTm->ChainOffset = 0;
4818         pScsiTm->Reserved = 0;
4819         pScsiTm->Reserved1 = 0;
4820         pScsiTm->TaskMsgContext = task_context;
4821         int_to_scsilun(lun, (struct scsi_lun *)pScsiTm->LUN);
4822 
4823         INITIALIZE_MGMT_STATUS(ioc->taskmgmt_cmds.status)
4824         CLEAR_MGMT_STATUS(ioc->internal_cmds.status)
4825         retval = 0;
4826         mpt_put_msg_frame_hi_pri(mptsasDeviceResetCtx, ioc, mf);
4827 
4828         /* Now wait for the command to complete */
4829 →       timeleft = wait_for_completion_timeout(&ioc->taskmgmt_cmds.done,
4830             timeout*HZ);
4831         if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_COMMAND_GOOD)) {
4832                 retval = -1; /* return failure */
4833                 dtmprintk(ioc, printk(MYIOC_s_ERR_FMT
4834                     "TaskMgmt request: TIMED OUT!(mr=%p)\n", ioc->name, mf));
4835                 mpt_free_msg_frame(ioc, mf);
4836                 if (ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_DID_IOCRESET)
4837                         goto out;
4838                 *issue_reset = 1;
4839                 goto out;
4840         }
4841 
4842         if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_RF_VALID)) {
4843                 retval = -1; /* return failure */
4844                 dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT
4845                     "TaskMgmt request: failed with no reply\n", ioc->name));
4846                 goto out;
4847         }

Hope this helps.

Best regards,
Mirsad Todorovac

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