This patch implements new notifier function to panic_notifier_list. We can change the list of order by debugfs. Thanks, --- Signed-off-by: Takenori Nagano <t-nagano at ah.jp.nec.com> --- diff -uprN linux-2.6.25.orig/arch/alpha/kernel/setup.c linux-2.6.25/arch/alpha/kernel/setup.c --- linux-2.6.25.orig/arch/alpha/kernel/setup.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/alpha/kernel/setup.c 2008-04-21 17:15:58.208654286 +0900 @@ -44,14 +44,18 @@ #include <asm/io.h> #include <linux/log2.h> -extern struct atomic_notifier_head panic_notifier_list; +extern struct tunable_atomic_notifier_head panic_notifier_list; static int alpha_panic_event(struct notifier_block *, unsigned long, void *); -static struct notifier_block alpha_panic_block = { +static struct notifier_block alpha_panic_block_base = { alpha_panic_event, NULL, INT_MAX /* try to do it first */ }; +static struct tunable_atomic_notifier_block alpha_panic_block = { + .nb = &alpha_panic_block_base +}; + #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/system.h> @@ -521,8 +525,8 @@ setup_arch(char **cmdline_p) } /* Register a call for panic conditions. */ - atomic_notifier_chain_register(&panic_notifier_list, - &alpha_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &alpha_panic_block, "alpha_panic", NULL); #ifdef CONFIG_ALPHA_GENERIC /* Assume that we've booted from SRM if we haven't booted from MILO. diff -uprN linux-2.6.25.orig/arch/arm/mach-omap1/board-voiceblue.c linux-2.6.25/arch/arm/mach-omap1/board-voiceblue.c --- linux-2.6.25.orig/arch/arm/mach-omap1/board-voiceblue.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/arm/mach-omap1/board-voiceblue.c 2008-04-21 17:15:58.252653690 +0900 @@ -226,14 +226,19 @@ static int panic_event(struct notifier_b return NOTIFY_DONE; } -static struct notifier_block panic_block = { +static struct notifier_block panic_block_base = { .notifier_call = panic_event, }; +static struct tunable_atomic_notifier_block panic_block = { + .nb = &panic_block_base +}; + static int __init voiceblue_setup(void) { /* Setup panic notifier */ - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_block, "VoiceBlue", NULL); return 0; } diff -uprN linux-2.6.25.orig/arch/mips/lasat/setup.c linux-2.6.25/arch/mips/lasat/setup.c --- linux-2.6.25.orig/arch/mips/lasat/setup.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/mips/lasat/setup.c 2008-04-21 17:15:58.288653222 +0900 @@ -106,7 +106,7 @@ static int lasat_panic_prom_monitor(stru return NOTIFY_DONE; } -static struct notifier_block lasat_panic_block[] = +static struct notifier_block lasat_panic_block_base[] = { { .notifier_call = lasat_panic_display, @@ -117,6 +117,18 @@ static struct notifier_block lasat_panic } }; +static struct tunable_atomic_notifier_block lasat_panic_block[] = { + { + .nb = &lasat_panic_block_base[0] + }, { + .nb = &lasat_panic_block_base[1] + } +}; + +static char* notifier_name[] = { + "lasat_panic_display", "lasat_panic_prom_monitor" +}; + void __init plat_time_init(void) { mips_hpt_frequency = lasat_board_info.li_cpu_hz / 2; @@ -134,8 +146,8 @@ void __init plat_mem_setup(void) /* Set up panic notifier */ for (i = 0; i < ARRAY_SIZE(lasat_panic_block); i++) - atomic_notifier_chain_register(&panic_notifier_list, - &lasat_panic_block[i]); + tunable_notifier_chain_register(&panic_notifier_list, + &lasat_panic_block[i], notifier_name[i], NULL); lasat_reboot_setup(); diff -uprN linux-2.6.25.orig/arch/mips/sgi-ip22/ip22-reset.c linux-2.6.25/arch/mips/sgi-ip22/ip22-reset.c --- linux-2.6.25.orig/arch/mips/sgi-ip22/ip22-reset.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/mips/sgi-ip22/ip22-reset.c 2008-04-21 17:15:58.324653254 +0900 @@ -226,10 +226,14 @@ static int panic_event(struct notifier_b return NOTIFY_DONE; } -static struct notifier_block panic_block = { +static struct notifier_block panic_block_base = { .notifier_call = panic_event, }; +static struct tunable_atomic_notifier_block panic_block = { + .nb = &panic_block_base +}; + static int __init reboot_setup(void) { int res; @@ -246,7 +250,8 @@ static int __init reboot_setup(void) init_timer(&blink_timer); blink_timer.function = blink_timeout; - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_block, "sgi-ip22", NULL); return 0; } diff -uprN linux-2.6.25.orig/arch/mips/sgi-ip32/ip32-reset.c linux-2.6.25/arch/mips/sgi-ip32/ip32-reset.c --- linux-2.6.25.orig/arch/mips/sgi-ip32/ip32-reset.c 2008-04-22 20:34:43.035578599 +0900 +++ linux-2.6.25/arch/mips/sgi-ip32/ip32-reset.c 2008-04-21 17:15:58.588651552 +0900 @@ -175,10 +175,14 @@ static int panic_event(struct notifier_b return NOTIFY_DONE; } -static struct notifier_block panic_block = { +static struct notifier_block panic_block_base = { .notifier_call = panic_event, }; +static struct tunable_atomic_notifier_block panic_block = { + .nb = &panic_block_base +}; + static __init int ip32_reboot_setup(void) { /* turn on the green led only */ @@ -193,7 +197,8 @@ static __init int ip32_reboot_setup(void init_timer(&blink_timer); blink_timer.function = blink_timeout; - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_block, "sgi-ip32", NULL); if (request_irq(MACEISA_RTC_IRQ, ip32_rtc_int, 0, "rtc", NULL)) panic("Can't allocate MACEISA RTC IRQ"); diff -uprN linux-2.6.25.orig/arch/parisc/kernel/pdc_chassis.c linux-2.6.25/arch/parisc/kernel/pdc_chassis.c --- linux-2.6.25.orig/arch/parisc/kernel/pdc_chassis.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/parisc/kernel/pdc_chassis.c 2008-04-21 17:15:58.604651614 +0900 @@ -101,11 +101,14 @@ static int pdc_chassis_panic_event(struc } -static struct notifier_block pdc_chassis_panic_block = { +static struct notifier_block pdc_chassis_panic_block_base = { .notifier_call = pdc_chassis_panic_event, .priority = INT_MAX, }; +static struct tunable_atomic_notifier_block pdc_chassis_panic_block = { + .nb = &pdc_chassis_panic_block_base +}; /** * parisc_reboot_event() - Called by the reboot handler. @@ -144,8 +147,8 @@ void __init parisc_pdc_chassis_init(void PDC_CHASSIS_VER); /* initialize panic notifier chain */ - atomic_notifier_chain_register(&panic_notifier_list, - &pdc_chassis_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &pdc_chassis_panic_block, "pdc_chassis", NULL); /* initialize reboot notifier chain */ register_reboot_notifier(&pdc_chassis_reboot_block); diff -uprN linux-2.6.25.orig/arch/powerpc/kernel/setup-common.c linux-2.6.25/arch/powerpc/kernel/setup-common.c --- linux-2.6.25.orig/arch/powerpc/kernel/setup-common.c 2008-04-22 20:34:43.439575752 +0900 +++ linux-2.6.25/arch/powerpc/kernel/setup-common.c 2008-04-21 17:15:58.628651402 +0900 @@ -609,14 +609,19 @@ static int ppc_panic_event(struct notifi return NOTIFY_DONE; } -static struct notifier_block ppc_panic_block = { +static struct notifier_block ppc_panic_block_base = { .notifier_call = ppc_panic_event, .priority = INT_MIN /* may not return; must be done last */ }; +static struct tunable_atomic_notifier_block ppc_panic_block = { + .nb = &ppc_panic_block_base +}; + void __init setup_panic(void) { - atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &ppc_panic_block, "powerpc", NULL); } #ifdef CONFIG_CHECK_CACHE_COHERENCY diff -uprN linux-2.6.25.orig/arch/ppc/platforms/prep_setup.c linux-2.6.25/arch/ppc/platforms/prep_setup.c --- linux-2.6.25.orig/arch/ppc/platforms/prep_setup.c 2008-04-22 20:34:44.015572781 +0900 +++ linux-2.6.25/arch/ppc/platforms/prep_setup.c 2008-04-21 17:15:58.772650588 +0900 @@ -634,12 +634,16 @@ ibm_statusled_panic(struct notifier_bloc return NOTIFY_DONE; } -static struct notifier_block ibm_statusled_block = { +static struct notifier_block ibm_statusled_block_base = { ibm_statusled_panic, NULL, INT_MAX /* try to do it first */ }; +static struct tunable_atomic_notifier_block ibm_statusled_block = { + .nb = &ibm_statusled_block_base +}; + static void ibm_statusled_progress(char *s, unsigned short hex) { @@ -654,8 +658,9 @@ ibm_statusled_progress(char *s, unsigned hex = 0xfff; if (!notifier_installed) { ++notifier_installed; - atomic_notifier_chain_register(&panic_notifier_list, - &ibm_statusled_block); + tunable_atomic_notifier_chain_register( + &panic_notifier_list, &ibm_statusled_block, + "IBM_statusLED", NULL); } } else diff -uprN linux-2.6.25.orig/arch/s390/kernel/ipl.c linux-2.6.25/arch/s390/kernel/ipl.c --- linux-2.6.25.orig/arch/s390/kernel/ipl.c 2008-04-22 20:34:44.103572199 +0900 +++ linux-2.6.25/arch/s390/kernel/ipl.c 2008-04-21 17:15:58.772650588 +0900 @@ -1372,11 +1372,15 @@ static int on_panic_notify(struct notifi return NOTIFY_OK; } -static struct notifier_block on_panic_nb = { +static struct notifier_block on_panic_nb_base = { .notifier_call = on_panic_notify, .priority = 0, }; +static struct tunable_atomic_notifier_block on_panic_nb = { + .nb = &on_panic_nb_base +}; + void __init setup_ipl(void) { ipl_info.type = get_ipl_type(); @@ -1402,7 +1406,8 @@ void __init setup_ipl(void) /* We have no info to copy */ break; } - atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &on_panic_nb, "s390_ipl", NULL); } void __init ipl_save_parameters(void) diff -uprN linux-2.6.25.orig/arch/sparc64/kernel/sstate.c linux-2.6.25/arch/sparc64/kernel/sstate.c --- linux-2.6.25.orig/arch/sparc64/kernel/sstate.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/sparc64/kernel/sstate.c 2008-04-21 17:15:58.772650588 +0900 @@ -82,11 +82,15 @@ static int sstate_panic_event(struct not return NOTIFY_DONE; } -static struct notifier_block sstate_panic_block = { +static struct notifier_block sstate_panic_block_base = { .notifier_call = sstate_panic_event, .priority = INT_MAX, }; +static struct tunable_atomic_notifier_block sstate_panic_block = { + .nb = &sstate_panic_block_base +}; + void __init sun4v_sstate_init(void) { unsigned long major, minor; @@ -99,6 +103,6 @@ void __init sun4v_sstate_init(void) hv_supports_soft_state = 1; prom_sun4v_guest_soft_state(); - atomic_notifier_chain_register(&panic_notifier_list, - &sstate_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &sstate_panic_block, "sstate" ,NULL); } diff -uprN linux-2.6.25.orig/arch/um/drivers/mconsole_kern.c linux-2.6.25/arch/um/drivers/mconsole_kern.c --- linux-2.6.25.orig/arch/um/drivers/mconsole_kern.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/um/drivers/mconsole_kern.c 2008-04-21 17:15:58.848643538 +0900 @@ -920,16 +920,20 @@ static int notify_panic(struct notifier_ return 0; } -static struct notifier_block panic_exit_notifier = { +static struct notifier_block panic_exit_notifier_base = { .notifier_call = notify_panic, .next = NULL, .priority = 1 }; +static struct tunable_atomic_notifier_block panic_exit_notifier = { + .nb = &panic_exit_notifier_base +}; + static int add_notifier(void) { - atomic_notifier_chain_register(&panic_notifier_list, - &panic_exit_notifier); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_exit_notifier, "mconsole", NULL); return 0; } diff -uprN linux-2.6.25.orig/arch/um/kernel/um_arch.c linux-2.6.25/arch/um/kernel/um_arch.c --- linux-2.6.25.orig/arch/um/kernel/um_arch.c 2008-04-22 20:34:44.335563438 +0900 +++ linux-2.6.25/arch/um/kernel/um_arch.c 2008-04-21 17:15:58.848643538 +0900 @@ -234,12 +234,16 @@ static int panic_exit(struct notifier_bl return 0; } -static struct notifier_block panic_exit_notifier = { +static struct notifier_block panic_exit_notifier_base = { .notifier_call = panic_exit, .next = NULL, .priority = 0 }; +static struct tunable_atomic_notifier_block panic_exit_notifier = { + .nb = &panic_exit_notifier_base +}; + /* Set during early boot */ unsigned long task_size; EXPORT_SYMBOL(task_size); @@ -357,8 +361,8 @@ int __init linux_main(int argc, char **a printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); - atomic_notifier_chain_register(&panic_notifier_list, - &panic_exit_notifier); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_exit_notifier, "um", NULL); uml_postsetup(); diff -uprN linux-2.6.25.orig/arch/x86/lguest/boot.c linux-2.6.25/arch/x86/lguest/boot.c --- linux-2.6.25.orig/arch/x86/lguest/boot.c 2008-04-22 20:34:44.807567744 +0900 +++ linux-2.6.25/arch/x86/lguest/boot.c 2008-04-21 17:15:58.848643538 +0900 @@ -820,17 +820,22 @@ static int lguest_panic(struct notifier_ return NOTIFY_DONE; } -static struct notifier_block paniced = { +static struct notifier_block paniced_base = { .notifier_call = lguest_panic }; +static struct tunable_atomic_notifier_block paniced = { + .nb = = &paniced_base +}; + /* Setting up memory is fairly easy. */ static __init char *lguest_memory_setup(void) { /* We do this here and not earlier because lockcheck used to barf if we * did it before start_kernel(). I think we fixed that, so it'd be * nice to move it back to lguest_init. Patch welcome... */ - atomic_notifier_chain_register(&panic_notifier_list, &paniced); + tunable_atomic_notifier_chain_register(&panic_notifier_list, &paniced, + "lguest", NULL); /* The Linux bootloader header contains an "e820" memory map: the * Launcher populated the first entry with our memory limit. */ diff -uprN linux-2.6.25.orig/arch/xtensa/platforms/iss/setup.c linux-2.6.25/arch/xtensa/platforms/iss/setup.c --- linux-2.6.25.orig/arch/xtensa/platforms/iss/setup.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/arch/xtensa/platforms/iss/setup.c 2008-04-21 17:15:58.848643538 +0900 @@ -98,13 +98,18 @@ iss_panic_event(struct notifier_block *t return NOTIFY_DONE; } -static struct notifier_block iss_panic_block = { +static struct notifier_block iss_panic_block_base = { iss_panic_event, NULL, 0 }; +static struct tunable_atomic_notifier_block iss_panic_block = { + .nb = &iss_panic_block_base +}; + void __init platform_setup(char **p_cmdline) { - atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &iss_panic_block, "iss_panic", NULL); } diff -uprN linux-2.6.25.orig/drivers/char/ipmi/ipmi_msghandler.c linux-2.6.25/drivers/char/ipmi/ipmi_msghandler.c --- linux-2.6.25.orig/drivers/char/ipmi/ipmi_msghandler.c 2008-04-22 20:34:46.675556380 +0900 +++ linux-2.6.25/drivers/char/ipmi/ipmi_msghandler.c 2008-04-21 17:15:58.972642550 +0900 @@ -4234,12 +4234,16 @@ static int panic_event(struct notifier_b return NOTIFY_DONE; } -static struct notifier_block panic_block = { +static struct notifier_block panic_block_base = { .notifier_call = panic_event, .next = NULL, .priority = 200 /* priority: INT_MAX >= x >= 0 */ }; +static struct tunable_atomic_notifier_block panic_block = { + .nb = &panic_block_base +}; + static int ipmi_init_msghandler(void) { int rv; @@ -4269,7 +4273,8 @@ static int ipmi_init_msghandler(void) setup_timer(&ipmi_timer, ipmi_timeout, 0); mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_block, "ipmi_msghandler", NULL); initialized = 1; @@ -4289,7 +4294,8 @@ static __exit void cleanup_ipmi(void) if (!initialized) return; - atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_unregister(&panic_notifier_list, + &panic_block); /* * This can't be called if any interfaces exist, so no worry diff -uprN linux-2.6.25.orig/drivers/char/ipmi/ipmi_watchdog.c linux-2.6.25/drivers/char/ipmi/ipmi_watchdog.c --- linux-2.6.25.orig/drivers/char/ipmi/ipmi_watchdog.c 2008-04-22 20:34:46.691555965 +0900 +++ linux-2.6.25/drivers/char/ipmi/ipmi_watchdog.c 2008-04-21 17:15:58.988649720 +0900 @@ -1157,12 +1157,15 @@ static int wdog_panic_handler(struct not return NOTIFY_OK; } -static struct notifier_block wdog_panic_notifier = { +static struct notifier_block wdog_panic_notifier_base = { .notifier_call = wdog_panic_handler, .next = NULL, .priority = 150 /* priority: INT_MAX >= x >= 0 */ }; +static struct tunable_atomic_notifier_block wdog_panic_notifier = { + .nb = &wdog_panic_notifier_base +}; static void ipmi_new_smi(int if_num, struct device *device) { @@ -1302,8 +1305,8 @@ static int __init ipmi_wdog_init(void) check_parms(); register_reboot_notifier(&wdog_reboot_notifier); - atomic_notifier_chain_register(&panic_notifier_list, - &wdog_panic_notifier); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &wdog_panic_notifier, "ipmi_wdog", NULL); rv = ipmi_smi_watcher_register(&smi_watcher); if (rv) { @@ -1311,8 +1314,8 @@ static int __init ipmi_wdog_init(void) if (nmi_handler_registered) unregister_die_notifier(&ipmi_nmi_handler); #endif - atomic_notifier_chain_unregister(&panic_notifier_list, - &wdog_panic_notifier); + tunable_atomic_notifier_chain_unregister(&panic_notifier_list, + &wdog_panic_notifier); unregister_reboot_notifier(&wdog_reboot_notifier); printk(KERN_WARNING PFX "can't register smi watcher\n"); return rv; @@ -1333,8 +1336,8 @@ static void __exit ipmi_wdog_exit(void) unregister_die_notifier(&ipmi_nmi_handler); #endif - atomic_notifier_chain_unregister(&panic_notifier_list, - &wdog_panic_notifier); + tunable_atomic_notifier_chain_unregister(&panic_notifier_list, + &wdog_panic_notifier); unregister_reboot_notifier(&wdog_reboot_notifier); } module_exit(ipmi_wdog_exit); diff -uprN linux-2.6.25.orig/drivers/misc/ibmasm/heartbeat.c linux-2.6.25/drivers/misc/ibmasm/heartbeat.c --- linux-2.6.25.orig/drivers/misc/ibmasm/heartbeat.c 2008-04-22 20:34:50.719536142 +0900 +++ linux-2.6.25/drivers/misc/ibmasm/heartbeat.c 2008-04-21 17:15:59.024649246 +0900 @@ -48,17 +48,22 @@ static int panic_happened(struct notifie return 0; } -static struct notifier_block panic_notifier = { panic_happened, NULL, 1 }; +static struct notifier_block panic_notifier_base = { panic_happened, NULL, 1 }; + +static struct tunable_atomic_notifier_block panic_notifier = { + .nb = &panic_notifier_base +}; void ibmasm_register_panic_notifier(void) { - atomic_notifier_chain_register(&panic_notifier_list, &panic_notifier); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_notifier, "ibmasm", NULL); } void ibmasm_unregister_panic_notifier(void) { - atomic_notifier_chain_unregister(&panic_notifier_list, - &panic_notifier); + tunable_atomic_notifier_chain_unregister(&panic_notifier_list, + &panic_notifier); } diff -uprN linux-2.6.25.orig/drivers/parisc/power.c linux-2.6.25/drivers/parisc/power.c --- linux-2.6.25.orig/drivers/parisc/power.c 2008-04-17 11:49:44.000000000 +0900 +++ linux-2.6.25/drivers/parisc/power.c 2008-04-21 17:15:59.036649566 +0900 @@ -189,11 +189,14 @@ static int parisc_panic_event(struct not return NOTIFY_DONE; } -static struct notifier_block parisc_panic_block = { +static struct notifier_block parisc_panic_block_base = { .notifier_call = parisc_panic_event, .priority = INT_MAX, }; +static struct tunable_atomic_notifier_block parisc_panic_block = { + .nb = &parisc_panic_block_base +}; static int __init power_init(void) { @@ -231,8 +234,8 @@ static int __init power_init(void) } /* Register a call for panic conditions. */ - atomic_notifier_chain_register(&panic_notifier_list, - &parisc_panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &parisc_panic_block, "parisc_panic", NULL); return 0; } @@ -241,8 +244,8 @@ static void __exit power_exit(void) { kthread_stop(power_task); - atomic_notifier_chain_unregister(&panic_notifier_list, - &parisc_panic_block); + tunable_atomic_notifier_chain_unregister(&panic_notifier_list, + &parisc_panic_block); pdc_soft_power_button(0); } diff -uprN linux-2.6.25.orig/kernel/softlockup.c linux-2.6.25/kernel/softlockup.c --- linux-2.6.25.orig/kernel/softlockup.c 2008-04-22 20:35:03.247453824 +0900 +++ linux-2.6.25/kernel/softlockup.c 2008-04-21 17:15:59.240648254 +0900 @@ -35,8 +35,12 @@ softlock_panic(struct notifier_block *th return NOTIFY_DONE; } -static struct notifier_block panic_block = { - .notifier_call = softlock_panic, +static struct notifier_block panic_block_base = { + .notifier_call = softlock_panic +}; + +static struct tunable_atomic_notifier_block panic_block = { + .nb = &panic_block_base }; /* @@ -310,5 +314,6 @@ __init void spawn_softlockup_task(void) cpu_callback(&cpu_nfb, CPU_ONLINE, cpu); register_cpu_notifier(&cpu_nfb); - atomic_notifier_chain_register(&panic_notifier_list, &panic_block); + tunable_atomic_notifier_chain_register(&panic_notifier_list, + &panic_block, "softlockup", NULL); }