diff options
Diffstat (limited to 'arch/x86/kernel/reboot.c')
| -rw-r--r-- | arch/x86/kernel/reboot.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 1da13022d544..d64889aa2d46 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -793,17 +793,23 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback) /* Leave the nmi callback set */ } +/* + * Check if the crash dumping IPI got issued and if so, call its callback + * directly. This function is used when we have already been in NMI handler. + * It doesn't return. + */ +void run_crash_ipi_callback(struct pt_regs *regs) +{ + if (crash_ipi_issued) + crash_nmi_callback(0, regs); +} + /* Override the weak function in kernel/panic.c */ void nmi_panic_self_stop(struct pt_regs *regs) { while (1) { - /* - * Wait for the crash dumping IPI to be issued, and then - * call its callback directly. - */ - if (READ_ONCE(crash_ipi_issued)) - crash_nmi_callback(0, regs); /* Don't return */ - + /* If no CPU is preparing crash dump, we simply loop here. */ + run_crash_ipi_callback(regs); cpu_relax(); } } @@ -813,4 +819,8 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback) { /* No other CPUs to shoot down */ } + +void run_crash_ipi_callback(struct pt_regs *regs) +{ +} #endif |