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Subject[tip:WIP.x86/core 28/29] arch/x86/kernel/cpu/acrn.c:52:2: error: implicit declaration of function 'entering_ack_irq'; did you mean 'spin_lock_irq'?
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/core
head: 830be9dae84c3a781f6d1594c4038c164bbae52b
commit: 6fc278e883365e67dd4a35e25b756d9d0c9d913c [28/29] x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector
config: x86_64-randconfig-s505280430 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
git checkout 6fc278e883365e67dd4a35e25b756d9d0c9d913c
# save the attached .config to linux build tree
make ARCH=x86_64

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

arch/x86/kernel/cpu/acrn.c: In function 'acrn_hv_vector_handler':
>> arch/x86/kernel/cpu/acrn.c:52:2: error: implicit declaration of function 'entering_ack_irq'; did you mean 'spin_lock_irq'? [-Werror=implicit-function-declaration]
entering_ack_irq();
^~~~~~~~~~~~~~~~
spin_lock_irq
>> arch/x86/kernel/cpu/acrn.c:58:2: error: implicit declaration of function 'exiting_irq'; did you mean 'in_irq'? [-Werror=implicit-function-declaration]
exiting_irq();
^~~~~~~~~~~
in_irq
cc1: some warnings being treated as errors

vim +52 arch/x86/kernel/cpu/acrn.c

40
41 __visible void __irq_entry acrn_hv_vector_handler(struct pt_regs *regs)
42 {
43 struct pt_regs *old_regs = set_irq_regs(regs);
44
45 /*
46 * The hypervisor requires that the APIC EOI should be acked.
47 * If the APIC EOI is not acked, the APIC ISR bit for the
48 * HYPERVISOR_CALLBACK_VECTOR will not be cleared and then it
49 * will block the interrupt whose vector is lower than
50 * HYPERVISOR_CALLBACK_VECTOR.
51 */
> 52 entering_ack_irq();
53 inc_irq_stat(irq_hv_callback_count);
54
55 if (acrn_intr_handler)
56 acrn_intr_handler();
57
> 58 exiting_irq();
59 set_irq_regs(old_regs);
60 }
61

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