Commit-ID: 00e7977dd1bbd46e336d7ef907d0fb6b6a4c294f Gitweb: http://git.kernel.org/tip/00e7977dd1bbd46e336d7ef907d0fb6b6a4c294f Author: Daniel J Blueman <daniel@xxxxxxxxxxxxx> AuthorDate: Tue, 4 Nov 2014 16:29:41 +0800 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Tue, 4 Nov 2014 18:17:27 +0100 x86: numachip: Fix 16-bit APIC ID truncation Prevent 16-bit APIC IDs being truncated by using correct mask. This fixes booting large systems, where the wrong core would receive the startup and init IPIs, causing hanging. Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxxxxxx> Cc: Steffen Persvold <sp@xxxxxxxxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1415089784-28779-1-git-send-email-daniel@xxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- arch/x86/kernel/apic/apic_numachip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c index 4128b5f..2aaee79 100644 --- a/arch/x86/kernel/apic/apic_numachip.c +++ b/arch/x86/kernel/apic/apic_numachip.c @@ -40,7 +40,7 @@ static unsigned int get_apic_id(unsigned long x) unsigned int id; rdmsrl(MSR_FAM10H_NODE_ID, value); - id = ((x >> 24) & 0xffU) | ((value << 2) & 0x3f00U); + id = ((x >> 24) & 0xffU) | ((value << 2) & 0xff00U); return id; } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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