Borislav Petkov
2022-May-20 11:52 UTC
[PATCH v1] x86/vmware: use unsigned integer for shifting
On Fri, May 20, 2022 at 05:17:12PM +0530, Shreenidhi Shedi wrote:> Shifting signed 32-bit value by 31 bits is implementation-defined > behaviour. Using unsigned is better option for this. > > Fixes: 4cca6ea04d31 ("x86/apic: Allow x2apic without IR on VMware platform") > > Signed-off-by: Shreenidhi Shedi <sshedi at vmware.com> > Signed-off-by: Shreenidhi Shedi <yesshedi at gmail.com>This is not how this is done - you need to set your author email properly in git so that it adds your From: ... @vmware.com> instead of having two SOBs.> --- > arch/x86/kernel/cpu/vmware.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c > index c04b933f48d3..7f44ea073436 100644 > --- a/arch/x86/kernel/cpu/vmware.c > +++ b/arch/x86/kernel/cpu/vmware.c > @@ -28,6 +28,7 @@ > #include <linux/cpu.h> > #include <linux/reboot.h> > #include <linux/static_call.h> > +#include <linux/bits.h> > #include <asm/div64.h> > #include <asm/x86_init.h> > #include <asm/hypervisor.h> > @@ -476,8 +477,8 @@ 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)) == 0 && > + (eax & BIT(VMWARE_CMD_LEGACY_X2APIC)) != 0;^^^^^^^^ You did hurry too much with sending a new version. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette