Messages in this thread | | | Date | Mon, 6 Mar 2017 17:01:47 +0800 | From | kbuild test robot <> | Subject | [tip:WIP.sched/core 11/11] drivers/scsi/ufs/ufshcd.c:2413:17: warning: 'tag' may be used uninitialized in this function |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core head: b7c6a9d358c54f2d57d3df384d42083817e05028 commit: b7c6a9d358c54f2d57d3df384d42083817e05028 [11/11] sched/wait: Introduce new, more compact wait_event*() primitives config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 6.2.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout b7c6a9d358c54f2d57d3df384d42083817e05028 # save the attached .config to linux build tree make.cross ARCH=ia64
Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/scsi/ufs/ufshcd.c: In function 'ufshcd_exec_dev_cmd': >> drivers/scsi/ufs/ufshcd.c:2413:17: warning: 'tag' may be used uninitialized in this function [-Wmaybe-uninitialized] lrbp->task_tag = tag; ~~~~~~~~~~~~~~~^~~~~ drivers/scsi/ufs/ufshcd.c:2589:6: note: 'tag' was declared here int tag; ^~~ drivers/scsi/ufs/ufshcd.c: In function 'ufshcd_issue_tm_cmd': >> drivers/scsi/ufs/ufshcd.c:5404:11: warning: 'free_slot' may be used uninitialized in this function [-Wmaybe-uninitialized] task_tag = hba->nutrs + free_slot; ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
vim +/tag +2413 drivers/scsi/ufs/ufshcd.c
7a3e97b0 Santosh Yaraganavi 2012-02-29 2397 spin_lock_irqsave(hba->host->host_lock, flags); 0e675efa Kiwoong Kim 2016-11-10 2398 ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false)); 7a3e97b0 Santosh Yaraganavi 2012-02-29 2399 ufshcd_send_command(hba, tag); 3441da7d Sujit Reddy Thumma 2014-05-26 2400 out_unlock: 7a3e97b0 Santosh Yaraganavi 2012-02-29 2401 spin_unlock_irqrestore(hba->host->host_lock, flags); 7a3e97b0 Santosh Yaraganavi 2012-02-29 2402 out: a3cd5ec5 Subhash Jadavani 2017-02-03 2403 up_read(&hba->clk_scaling_lock); 7a3e97b0 Santosh Yaraganavi 2012-02-29 2404 return err; 7a3e97b0 Santosh Yaraganavi 2012-02-29 2405 } 7a3e97b0 Santosh Yaraganavi 2012-02-29 2406 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2407 static int ufshcd_compose_dev_cmd(struct ufs_hba *hba, 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2408 struct ufshcd_lrb *lrbp, enum dev_cmd_type cmd_type, int tag) 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2409 { 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2410 lrbp->cmd = NULL; 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2411 lrbp->sense_bufflen = 0; 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2412 lrbp->sense_buffer = NULL; 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 @2413 lrbp->task_tag = tag; 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2414 lrbp->lun = 0; /* device management cmd is not specific to any LUN */ 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2415 lrbp->intr_cmd = true; /* No interrupt aggregation */ 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2416 hba->dev_cmd.type = cmd_type; 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2417 300bb13f Joao Pinto 2016-05-11 2418 return ufshcd_comp_devman_upiu(hba, lrbp); 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2419 } 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2420 5a0b0cb9 Sujit Reddy Thumma 2013-07-30 2421 static int
:::::: The code at line 2413 was first introduced by commit :::::: 5a0b0cb9bee767ef10ff9ce2fb4141af06416288 [SCSI] ufs: Add support for sending NOP OUT UPIU
:::::: TO: Sujit Reddy Thumma <sthumma@codeaurora.org> :::::: CC: James Bottomley <JBottomley@Parallels.com>
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