tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge head: 7f82463a4ec5fd466fa00e93d627b38da5d43ae2 commit: 0897a442fca735890658fe84ace34bdac0e7bcce [10/36] PM: sleep: stats: Use array of suspend step names config: arm-randconfig-001-20240203 (https://download.01.org/0day-ci/archive/20240204/202402041425.jNvSR8Q1-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7dd790db8b77c4a833c06632e903dc4f13877a64) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240204/202402041425.jNvSR8Q1-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202402041425.jNvSR8Q1-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> drivers/char/apm-emulation.c:91:2: error: redefinition of enumerator 'SUSPEND_NONE' 91 | SUSPEND_NONE, | ^ include/linux/suspend.h:44:2: note: previous definition is here 44 | SUSPEND_NONE = 0, | ^ drivers/char/apm-emulation.c:319:23: warning: implicit conversion from enumeration type 'enum suspend_stat_step' to different enumeration type 'enum apm_suspend_state' [-Wenum-conversion] 319 | as->suspend_state = SUSPEND_NONE; | ~ ^~~~~~~~~~~~ 1 warning and 1 error generated. vim +/SUSPEND_NONE +91 drivers/char/apm-emulation.c 7726942fb15edd Ralf Baechle 2007-02-09 50 d20a4dca47d2cd Johannes Berg 2008-06-11 51 /* d20a4dca47d2cd Johannes Berg 2008-06-11 52 * thread states (for threads using a writable /dev/apm_bios fd): d20a4dca47d2cd Johannes Berg 2008-06-11 53 * d20a4dca47d2cd Johannes Berg 2008-06-11 54 * SUSPEND_NONE: nothing happening d20a4dca47d2cd Johannes Berg 2008-06-11 55 * SUSPEND_PENDING: suspend event queued for thread and pending to be read d20a4dca47d2cd Johannes Berg 2008-06-11 56 * SUSPEND_READ: suspend event read, pending acknowledgement d20a4dca47d2cd Johannes Berg 2008-06-11 57 * SUSPEND_ACKED: acknowledgement received from thread (via ioctl), d20a4dca47d2cd Johannes Berg 2008-06-11 58 * waiting for resume d20a4dca47d2cd Johannes Berg 2008-06-11 59 * SUSPEND_ACKTO: acknowledgement timeout d20a4dca47d2cd Johannes Berg 2008-06-11 60 * SUSPEND_DONE: thread had acked suspend and is now notified of d20a4dca47d2cd Johannes Berg 2008-06-11 61 * resume d20a4dca47d2cd Johannes Berg 2008-06-11 62 * d20a4dca47d2cd Johannes Berg 2008-06-11 63 * SUSPEND_WAIT: this thread invoked suspend and is waiting for resume d20a4dca47d2cd Johannes Berg 2008-06-11 64 * d20a4dca47d2cd Johannes Berg 2008-06-11 65 * A thread migrates in one of three paths: d20a4dca47d2cd Johannes Berg 2008-06-11 66 * NONE -1-> PENDING -2-> READ -3-> ACKED -4-> DONE -5-> NONE d20a4dca47d2cd Johannes Berg 2008-06-11 67 * -6-> ACKTO -7-> NONE d20a4dca47d2cd Johannes Berg 2008-06-11 68 * NONE -8-> WAIT -9-> NONE d20a4dca47d2cd Johannes Berg 2008-06-11 69 * d20a4dca47d2cd Johannes Berg 2008-06-11 70 * While in PENDING or READ, the thread is accounted for in the d20a4dca47d2cd Johannes Berg 2008-06-11 71 * suspend_acks_pending counter. d20a4dca47d2cd Johannes Berg 2008-06-11 72 * d20a4dca47d2cd Johannes Berg 2008-06-11 73 * The transitions are invoked as follows: d20a4dca47d2cd Johannes Berg 2008-06-11 74 * 1: suspend event is signalled from the core PM code d20a4dca47d2cd Johannes Berg 2008-06-11 75 * 2: the suspend event is read from the fd by the userspace thread d20a4dca47d2cd Johannes Berg 2008-06-11 76 * 3: userspace thread issues the APM_IOC_SUSPEND ioctl (as ack) d20a4dca47d2cd Johannes Berg 2008-06-11 77 * 4: core PM code signals that we have resumed d20a4dca47d2cd Johannes Berg 2008-06-11 78 * 5: APM_IOC_SUSPEND ioctl returns d20a4dca47d2cd Johannes Berg 2008-06-11 79 * d20a4dca47d2cd Johannes Berg 2008-06-11 80 * 6: the notifier invoked from the core PM code timed out waiting d20a4dca47d2cd Johannes Berg 2008-06-11 81 * for all relevant threds to enter ACKED state and puts those d20a4dca47d2cd Johannes Berg 2008-06-11 82 * that haven't into ACKTO d20a4dca47d2cd Johannes Berg 2008-06-11 83 * 7: those threads issue APM_IOC_SUSPEND ioctl too late, d20a4dca47d2cd Johannes Berg 2008-06-11 84 * get an error d20a4dca47d2cd Johannes Berg 2008-06-11 85 * d20a4dca47d2cd Johannes Berg 2008-06-11 86 * 8: userspace thread issues the APM_IOC_SUSPEND ioctl (to suspend), d20a4dca47d2cd Johannes Berg 2008-06-11 87 * ioctl code invokes pm_suspend() d20a4dca47d2cd Johannes Berg 2008-06-11 88 * 9: pm_suspend() returns indicating resume d20a4dca47d2cd Johannes Berg 2008-06-11 89 */ d20a4dca47d2cd Johannes Berg 2008-06-11 90 enum apm_suspend_state { d20a4dca47d2cd Johannes Berg 2008-06-11 @91 SUSPEND_NONE, d20a4dca47d2cd Johannes Berg 2008-06-11 92 SUSPEND_PENDING, d20a4dca47d2cd Johannes Berg 2008-06-11 93 SUSPEND_READ, d20a4dca47d2cd Johannes Berg 2008-06-11 94 SUSPEND_ACKED, d20a4dca47d2cd Johannes Berg 2008-06-11 95 SUSPEND_ACKTO, d20a4dca47d2cd Johannes Berg 2008-06-11 96 SUSPEND_WAIT, d20a4dca47d2cd Johannes Berg 2008-06-11 97 SUSPEND_DONE, d20a4dca47d2cd Johannes Berg 2008-06-11 98 }; d20a4dca47d2cd Johannes Berg 2008-06-11 99 :::::: The code at line 91 was first introduced by commit :::::: d20a4dca47d2cd027ed58a13f91b424affd1f449 APM emulation: Notify about all suspend events, not just APM invoked ones (v2) :::::: TO: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> :::::: CC: Andi Kleen <andi@xxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
