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Subjectarch/arm64/kvm/hyp/nvhe/hyp-main.c:18:6: warning: no previous prototype for 'handle_trap'
Hi Andrew,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 65f0d2414b7079556fbbcc070b3d1c9f9587606d
commit: 4e3393a969a0bdaae83263918b6824b2d08c3996 KVM: arm64: nVHE: Switch to hyp context for EL2
date: 4 months ago
config: arm64-randconfig-r005-20210113 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4e3393a969a0bdaae83263918b6824b2d08c3996
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 4e3393a969a0bdaae83263918b6824b2d08c3996
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64

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

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/hyp/nvhe/hyp-main.c:18:6: warning: no previous prototype for 'handle_trap' [-Wmissing-prototypes]
18 | void handle_trap(struct kvm_cpu_context *host_ctxt)
| ^~~~~~~~~~~

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for NVMEM_IMX_OCOTP
Depends on NVMEM && (ARCH_MXC || COMPILE_TEST && HAS_IOMEM
Selected by
- ARM_IMX6Q_CPUFREQ && CPU_FREQ && (ARM || ARM64 && ARCH_MXC && REGULATOR_ANATOP


vim +/handle_trap +18 arch/arm64/kvm/hyp/nvhe/hyp-main.c

14
15 typedef unsigned long (*hypcall_fn_t)
16 (unsigned long, unsigned long, unsigned long);
17
> 18 void handle_trap(struct kvm_cpu_context *host_ctxt)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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