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SubjectRe: [PATCH V2 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available
Hi Lan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on v5.0-rc4 next-20190201]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/lantianyu1986-gmail-com/x86-Hyper-V-IOMMU-Add-Hyper-V-IOMMU-driver-to-support-x2apic-mode/20190204-132009
base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-x005-201905 (attached as .config)
compiler: gcc-8 (Debian 8.2.0-14) 8.2.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

arch/x86//kernel/cpu/mshyperv.c: In function 'ms_hyperv_init_platform':
>> arch/x86//kernel/cpu/mshyperv.c:339:3: error: 'x2apic_phys' undeclared (first use in this function); did you mean 'x2apic_mode'?
x2apic_phys = 1;
^~~~~~~~~~~
x2apic_mode
arch/x86//kernel/cpu/mshyperv.c:339:3: note: each undeclared identifier is reported only once for each function it appears in

vim +339 arch/x86//kernel/cpu/mshyperv.c

331
332 /*
333 * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic,
334 * set x2apic destination mode to physcial mode when x2apic is available
335 * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs
336 * have 8-bit APIC id.
337 */
338 if (IS_ENABLED(CONFIG_HYPERV_IOMMU) && x2apic_supported())
> 339 x2apic_phys = 1;
340

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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