The patch titled
x86/apbt: conditionally register cpu hp notifier for apbt
has been removed from the -mm tree. Its filename was
x86-apbt-conditionally-register-cpu-hp-notifier-for-apbt.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: x86/apbt: conditionally register cpu hp notifier for apbt
From: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
APB timer is used on Moorestown platforms but not on a standard PC.
If APB timer code is compiled in but not initialized at run-time due
to lack of FW reported SFI table, kernel would panic when the non-boot
CPUs are offlined and notifier is called.
This patch ensures CPU hotplug notifier for APB timer is only registered
when the APBT timer block is initialized.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=15786
Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
Reported-by: Andreas Jaeger <jaegerandi@xxxxxxxxx>
Tested-by: Andreas Jaeger <jaegerandi@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/apb_timer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/x86/kernel/apb_timer.c~x86-apbt-conditionally-register-cpu-hp-notifier-for-apbt arch/x86/kernel/apb_timer.c
--- a/arch/x86/kernel/apb_timer.c~x86-apbt-conditionally-register-cpu-hp-notifier-for-apbt
+++ a/arch/x86/kernel/apb_timer.c
@@ -429,7 +429,7 @@ static int apbt_cpuhp_notify(struct noti
static __init int apbt_late_init(void)
{
- if (disable_apbt_percpu)
+ if (disable_apbt_percpu || !apb_timer_block_enabled)
return 0;
/* This notifier should be called after workqueue is ready */
hotcpu_notifier(apbt_cpuhp_notify, -20);
_
Patches currently in -mm which might be from jacob.jun.pan@xxxxxxxxxxxxxxx are
linux-next.patch
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