linux/arch/x86/kernel/apic
Thomas Gleixner df610d6788 x86/apic: Prevent pointless warning messages
Markus reported that he sees new warnings:

  APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 4/0x84 ignored.
  APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 5/0x85 ignored.

This comes from the recent persistant cpuid - nodeid changes. The code
which emits the warning has been called prior to these changes only for
enabled processors. Now it's called for disabled processors as well to get
the possible cpu accounting correct. So if the kernel is compiled for the
number of actual available/enabled CPUs and the BIOS reports disabled CPUs
as well then the above warnings are printed.

That's a pointless exercise as it only makes sense if there are more CPUs
enabled than the kernel supports.

Nake the warning conditional on enabled processors so we are back to the
state before these changes.

Fixes: 8f54969dc8 ("x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping") 
Reported-and-tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: linux-acpi@vger.kernel.org
Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610071549330.19804@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-10-08 12:18:36 +02:00
..
apic_flat_64.c Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 17:18:52 -07:00
apic_noop.c x86: Apply more __ro_after_init and const 2016-08-10 14:55:05 +02:00
apic_numachip.c x86: Clean up various simple wrapper functions 2016-09-13 20:42:58 +02:00
apic.c x86/apic: Prevent pointless warning messages 2016-10-08 12:18:36 +02:00
bigsmp_32.c x86: Apply more __ro_after_init and const 2016-08-10 14:55:05 +02:00
htirq.c x86: Constify irqdomain ops 2015-05-05 11:14:48 +02:00
hw_nmi.c x86/kernel: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:41 +02:00
io_apic.c x86/apic: Get rid of apic_version[] array 2016-09-20 00:31:19 +02:00
ipi.c x86/kernel: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:41 +02:00
Makefile kernel: add kcov code coverage 2016-03-22 15:36:02 -07:00
msi.c x86: Apply more __ro_after_init and const 2016-08-10 14:55:05 +02:00
probe_32.c Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 16:13:28 -07:00
probe_64.c x86/apic: Remove duplicated include from probe_64.c 2016-07-19 16:02:31 +02:00
vector.c x86/irq: Prevent force migration of irqs which are not in the vector domain 2016-10-04 13:13:47 +02:00
x2apic_cluster.c Merge branch 'x86/mm' into x86/asm, to unify the two branches for simplicity 2016-09-08 08:41:52 +02:00
x2apic_phys.c x86: Apply more __ro_after_init and const 2016-08-10 14:55:05 +02:00
x2apic_uv_x.c Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 19:43:08 -07:00