Hi Prarit, [auto build test ERROR on linus/master] [also build test ERROR on v4.13-rc2] [cannot apply to next-20170726] [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/Prarit-Bhargava/printk-allow-different-timestamps-for-printk-time/20170727-104148 config: i386-tinyconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): kernel/printk/printk.c: In function 'printk_late_init': >> kernel/printk/printk.c:2746:6: error: 'printk_time_setting' undeclared (first use in this function) if (printk_time_setting == 0) ^~~~~~~~~~~~~~~~~~~ kernel/printk/printk.c:2746:6: note: each undeclared identifier is reported only once for each function it appears in >> kernel/printk/printk.c:2747:25: error: 'printk_time' undeclared (first use in this function) printk_time_setting = printk_time; ^~~~~~~~~~~ vim +/printk_time_setting +2746 kernel/printk/printk.c 2724 2725 /* 2726 * Some boot consoles access data that is in the init section and which will 2727 * be discarded after the initcalls have been run. To make sure that no code 2728 * will access this data, unregister the boot consoles in a late initcall. 2729 * 2730 * If for some reason, such as deferred probe or the driver being a loadable 2731 * module, the real console hasn't registered yet at this point, there will 2732 * be a brief interval in which no messages are logged to the console, which 2733 * makes it difficult to diagnose problems that occur during this time. 2734 * 2735 * To mitigate this problem somewhat, only unregister consoles whose memory 2736 * intersects with the init section. Note that code exists elsewhere to get 2737 * rid of the boot console as soon as the proper console shows up, so there 2738 * won't be side-effects from postponing the removal. 2739 */ 2740 static int __init printk_late_init(void) 2741 { 2742 struct console *con; 2743 int ret; 2744 2745 /* initialize printk_time settings */ > 2746 if (printk_time_setting == 0) > 2747 printk_time_setting = printk_time; 2748 2749 for_each_console(con) { 2750 if (!keep_bootcon && con->flags & CON_BOOT) { 2751 /* 2752 * Make sure to unregister boot consoles whose data 2753 * resides in the init section before the init section 2754 * is discarded. Boot consoles whose data will stick 2755 * around will automatically be unregistered when the 2756 * proper console replaces them. 2757 */ 2758 if (init_section_intersects(con, sizeof(*con))) 2759 unregister_console(con); 2760 } 2761 } 2762 ret = cpuhp_setup_state_nocalls(CPUHP_PRINTK_DEAD, "printk:dead", NULL, 2763 console_cpu_notify); 2764 WARN_ON(ret < 0); 2765 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "printk:online", 2766 console_cpu_notify, NULL); 2767 WARN_ON(ret < 0); 2768 return 0; 2769 } 2770 late_initcall(printk_late_init); 2771 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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