Commit-ID: 25e5a76bae106e1673887db09e22b19cb1a86c45 Gitweb: http://git.kernel.org/tip/25e5a76bae106e1673887db09e22b19cb1a86c45 Author: Daniel J Blueman <[email protected]> AuthorDate: Tue, 4 Nov 2014 16:29:42 +0800 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 4 Nov 2014 18:17:27 +0100
x86: numachip: Elide self-IPI ICR polling The default self-IPI path polls the ICR to delay sending the IPI until there is no IPI in progress. This is redundant on x86-86 APICs, since IPIs are queued. See the AMD64 Architecture Programmer's Manual, vol 2, p525. Signed-off-by: Daniel J Blueman <[email protected]> Cc: Steffen Persvold <[email protected]> Cc: Bjorn Helgaas <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- 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 2aaee79..7a31912 100644 --- a/arch/x86/kernel/apic/apic_numachip.c +++ b/arch/x86/kernel/apic/apic_numachip.c @@ -145,7 +145,7 @@ static void numachip_send_IPI_all(int vector) static void numachip_send_IPI_self(int vector) { - __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); + apic_write(APIC_SELF_IPI, vector); } static int __init numachip_probe(void) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
