Messages in this thread Patch in this message | | | Date | Wed, 1 Mar 2017 01:14:12 -0800 | From | tip-bot for Dou Liyang <> | Subject | [tip:x86/urgent] x86/apic: Fix a warning message in logical CPU IDs allocation |
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Commit-ID: bb3f0a52630c84807fca9bdd76ac2f5dcec82689 Gitweb: http://git.kernel.org/tip/bb3f0a52630c84807fca9bdd76ac2f5dcec82689 Author: Dou Liyang <douly.fnst@cn.fujitsu.com> AuthorDate: Tue, 28 Feb 2017 13:50:52 +0800 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 1 Mar 2017 10:09:08 +0100
x86/apic: Fix a warning message in logical CPU IDs allocation
The current warning message in allocate_logical_cpuid() is somewhat confusing:
Only 1 processors supported.Processor 2/0x2 and the rest are ignored.
As it might imply that there's only one CPU in the system - while what we ran into here is a kernel limitation.
Fix the warning message to clarify all that:
APIC: NR_CPUS/possible_cpus limit of 2 reached. Processor 2/0x2 and the rest are ignored.
( Also update the error return from -1 to -EINVAL, which is the more canonical return value. )
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bp@alien8.de Cc: nicstange@gmail.com Cc: wanpeng.li@hotmail.com Link: http://lkml.kernel.org/r/1488261052-25753-1-git-send-email-douly.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/apic/apic.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 4261b32..11088b8 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2062,10 +2062,10 @@ static int allocate_logical_cpuid(int apicid) /* Allocate a new cpuid. */ if (nr_logical_cpuids >= nr_cpu_ids) { - WARN_ONCE(1, "Only %d processors supported." + WARN_ONCE(1, "APIC: NR_CPUS/possible_cpus limit of %i reached. " "Processor %d/0x%x and the rest are ignored.\n", - nr_cpu_ids - 1, nr_logical_cpuids, apicid); - return -1; + nr_cpu_ids, nr_logical_cpuids, apicid); + return -EINVAL; } cpuid_to_apicid[nr_logical_cpuids] = apicid;
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