From: James Morse james.morse@arm.com
[ Upstream commit 78b0b690f6558ed788dccafa45965325dd11ba89 ]
oops_begin() exists to group printk() messages with the oops message printed by die(). To reach this caller we know that platform firmware took this error first, then notified the OS via NMI with a 'panic' severity.
Don't wait for another CPU to release the die-lock before panic()ing, our only goal is to print this fatal error and panic().
This code is always called in_nmi(), and since commit 42a0bb3f7138 ("printk/nmi: generic solution for safe printk in NMI"), it has been safe to call printk() from this context. Messages are batched in a per-cpu buffer and printed via irq-work, or a call back from panic().
Link: https://patchwork.kernel.org/patch/10313555/ Acked-by: Borislav Petkov bp@suse.de Signed-off-by: James Morse james.morse@arm.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/apei/ghes.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index f008ba7c9cedc..0c46b79e31b1e 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -33,7 +33,6 @@ #include <linux/interrupt.h> #include <linux/timer.h> #include <linux/cper.h> -#include <linux/kdebug.h> #include <linux/platform_device.h> #include <linux/mutex.h> #include <linux/ratelimit.h> @@ -949,7 +948,6 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
sev = ghes_severity(ghes->estatus->error_severity); if (sev >= GHES_SEV_PANIC) { - oops_begin(); ghes_print_queued_estatus(); __ghes_panic(ghes); }