From 4745ca43104b422354f06dc814d3f13661f217af Mon Sep 17 00:00:00 2001 From: Shreenidhi Shedi Date: Wed, 1 Jun 2022 15:48:20 +0530 Subject: x86/vmware: Use BIT() macro for shifting VMWARE_CMD_VCPU_RESERVED is bit 31 and that would mean undefined behavior when shifting an int but the kernel is built with -fno-strict-overflow which will wrap around using two's complement. Use the BIT() macro to improve readability and avoid any potential overflow confusion because it uses an unsigned long. [ bp: Clarify commit message. ] Signed-off-by: Shreenidhi Shedi Signed-off-by: Borislav Petkov Reviewed-by: Srivatsa S. Bhat (VMware) Link: https://lore.kernel.org/r/20220601101820.535031-1-sshedi@vmware.com --- arch/x86/kernel/cpu/vmware.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index c04b933f48d3..02039ec3597d 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -476,8 +476,8 @@ static bool __init vmware_legacy_x2apic_available(void) { uint32_t eax, ebx, ecx, edx; VMWARE_CMD(GETVCPU_INFO, eax, ebx, ecx, edx); - return (eax & (1 << VMWARE_CMD_VCPU_RESERVED)) == 0 && - (eax & (1 << VMWARE_CMD_LEGACY_X2APIC)) != 0; + return !(eax & BIT(VMWARE_CMD_VCPU_RESERVED)) && + (eax & BIT(VMWARE_CMD_LEGACY_X2APIC)); } #ifdef CONFIG_AMD_MEM_ENCRYPT -- cgit v1.2.3