linux-kernel - [PATCH] x86/apic: Fix use of X{,2}APIC

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Date:   Mon, 22 May 2023 11:57:38 +0100
From:   Andrew Cooper <andrew.cooper3@...rix.com>
To:     <tglx@...utronix.de>
CC:     <James.Bottomley@...senPartnership.com>,
        <andrew.cooper3@...rix.com>, <arjan@...ux.intel.com>,
        <arnd@...db.de>, <boris.ostrovsky@...cle.com>, <brgerst@...il.com>,
        <catalin.marinas@....com>, <deller@....de>, <dwmw2@...radead.org>,
        <gpiccoli@...lia.com>, <guoren@...nel.org>, <jgross@...e.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-csky@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-mips@...r.kernel.org>, <linux-parisc@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux@...linux.org.uk>,
        <lucjan.lucjanov@...il.com>, <mark.rutland@....com>,
        <mikelley@...rosoft.com>, <oleksandr@...alenko.name>,
        <palmer@...belt.com>, <paul.walmsley@...ive.com>,
        <paulmck@...nel.org>, <pbonzini@...hat.com>,
        <pmenzel@...gen.mpg.de>, <ross.philipson@...cle.com>,
        <sabrapan@...zon.com>, <seanjc@...gle.com>,
        <thomas.lendacky@....com>, <tsbogend@...ha.franken.de>,
        <usama.arif@...edance.com>, <will@...nel.org>, <x86@...nel.org>,
        <xen-devel@...ts.xenproject.org>,
        Jeffrey Hugo <quic_jhugo@...cinc.com>
Subject: [PATCH] x86/apic: Fix use of X{,2}APIC_ENABLE in asm with older binutils

"x86/smpboot: Support parallel startup of secondary CPUs" adds the first use
of X2APIC_ENABLE in assembly, but older binutils don't tolerate the UL suffix.

Switch to using BIT() instead.

Fixes: 7e75178a0950 ("x86/smpboot: Support parallel startup of secondary CPUs")
Reported-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Tested-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@...rix.com>
---
 arch/x86/include/asm/apicdef.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index bf546dfb6e58..4b125e5b3187 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -2,6 +2,8 @@
 #ifndef _ASM_X86_APICDEF_H
 #define _ASM_X86_APICDEF_H
 
+#include <linux/bits.h>
+
 /*
  * Constants for various Intel APICs. (local APIC, IOAPIC, etc.)
  *
@@ -140,8 +142,8 @@
 #define APIC_BASE (fix_to_virt(FIX_APIC_BASE))
 #define APIC_BASE_MSR		0x800
 #define APIC_X2APIC_ID_MSR	0x802
-#define XAPIC_ENABLE	(1UL << 11)
-#define X2APIC_ENABLE	(1UL << 10)
+#define XAPIC_ENABLE		BIT(11)
+#define X2APIC_ENABLE		BIT(10)
 
 #ifdef CONFIG_X86_32
 # define MAX_IO_APICS 64

base-commit: 0c7ffa32dbd6b09a87fea4ad1de8b27145dfd9a6
-- 
2.30.2