arch/arm64/kvm/va_layout.c:286:6: warning: no previous prototype for function 'kvm_get_kimage_voffset'

From: kernel test robot
Date: Sat Aug 14 2021 - 23:21:34 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: ba31f97d43be41ca99ab72a6131d7c226306865f
commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
date: 3 months ago
config: arm64-randconfig-r013-20210814 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 62df4df41c939205b2dc0a2a3bfb75b8c1ed74fa)
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=63b3f96e1a989846a5a521d4fbef4bc86406929d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 63b3f96e1a989846a5a521d4fbef4bc86406929d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64

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

All warnings (new ones prefixed by >>):

arch/arm64/kvm/va_layout.c:188:6: warning: no previous prototype for function 'kvm_patch_vector_branch' [-Wmissing-prototypes]
void kvm_patch_vector_branch(struct alt_instr *alt,
^
arch/arm64/kvm/va_layout.c:188:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void kvm_patch_vector_branch(struct alt_instr *alt,
^
static
>> arch/arm64/kvm/va_layout.c:286:6: warning: no previous prototype for function 'kvm_get_kimage_voffset' [-Wmissing-prototypes]
void kvm_get_kimage_voffset(struct alt_instr *alt,
^
arch/arm64/kvm/va_layout.c:286:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void kvm_get_kimage_voffset(struct alt_instr *alt,
^
static
>> arch/arm64/kvm/va_layout.c:292:6: warning: no previous prototype for function 'kvm_compute_final_ctr_el0' [-Wmissing-prototypes]
void kvm_compute_final_ctr_el0(struct alt_instr *alt,
^
arch/arm64/kvm/va_layout.c:292:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void kvm_compute_final_ctr_el0(struct alt_instr *alt,
^
static
3 warnings generated.
--
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:182:25: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_CP14_64] = kvm_handle_cp14_64,
^~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:183:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_HVC32] = handle_hvc,
^~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:184:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_SMC32] = handle_smc,
^~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:185:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_HVC64] = handle_hvc,
^~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:186:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_SMC64] = handle_smc,
^~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:187:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_SYS64] = kvm_handle_sys_reg,
^~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:188:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_SVE] = handle_sve,
^~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:189:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_IABT_LOW] = kvm_handle_guest_abort,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:190:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_DABT_LOW] = kvm_handle_guest_abort,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:191:28: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_SOFTSTP_LOW]= kvm_handle_guest_debug,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:192:28: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_WATCHPT_LOW]= kvm_handle_guest_debug,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:193:28: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_BREAKPT_LOW]= kvm_handle_guest_debug,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:194:24: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_BKPT32] = kvm_handle_guest_debug,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:195:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_BRK64] = kvm_handle_guest_debug,
^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:196:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_FP_ASIMD] = handle_no_fpsimd,
^~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:197:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[ESR_ELx_EC_PAC] = kvm_handle_ptrauth,
^~~~~~~~~~~~~~~~~~
arch/arm64/kvm/handle_exit.c:176:27: note: previous initialization is here
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
^~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kvm/handle_exit.c:295:24: warning: no previous prototype for function 'nvhe_hyp_panic_handler' [-Wmissing-prototypes]
void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr, u64 elr,
^
arch/arm64/kvm/handle_exit.c:295:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr, u64 elr,
^
static
22 warnings generated.
--
>> arch/arm64/kvm/sys_regs.c:1564:13: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.reset = reset_pmcr, .reg = PMCR_EL0 },
^~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1563:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMCR_EL0), .access = access_pmcr,
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1576:38: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.access = access_pmceid, .reset = NULL },
^~~~
include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
#define NULL ((void *)0)
^~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1575:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMCEID0_EL0),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1578:38: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.access = access_pmceid, .reset = NULL },
^~~~
include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
#define NULL ((void *)0)
^~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1577:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMCEID1_EL0),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1582:43: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.access = access_pmu_evtyper, .reset = NULL },
^~~~
include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
#define NULL ((void *)0)
^~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1581:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMXEVTYPER_EL0),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1584:42: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.access = access_pmu_evcntr, .reset = NULL },
^~~~
include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
#define NULL ((void *)0)
^~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1583:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMXEVCNTR_EL0),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1590:13: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.reset = reset_val, .reg = PMUSERENR_EL0, .val = 0 },
^~~~~~~~~
arch/arm64/kvm/sys_regs.c:1589:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMUSERENR_EL0), .access = access_pmuserenr,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:1745:13: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
.reset = reset_val, .reg = PMCCFILTR_EL0, .val = 0 },
^~~~~~~~~
arch/arm64/kvm/sys_regs.c:1744:4: note: previous initialization is here
{ PMU_SYS_REG(SYS_PMCCFILTR_EL0), .access = access_pmu_evtyper,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kvm/sys_regs.c:947:24: note: expanded from macro 'PMU_SYS_REG'
SYS_DESC(r), .reset = reset_unknown, .visibility = pmu_visibility
^~~~~~~~~~~~~
7 warnings generated.
--
>> arch/arm64/kvm/hyp/vhe/switch.c:215:17: warning: no previous prototype for function 'hyp_panic' [-Wmissing-prototypes]
void __noreturn hyp_panic(void)
^
arch/arm64/kvm/hyp/vhe/switch.c:215:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __noreturn hyp_panic(void)
^
static
>> arch/arm64/kvm/hyp/vhe/switch.c:225:17: warning: no previous prototype for function 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
asmlinkage void kvm_unexpected_el2_exception(void)
^
arch/arm64/kvm/hyp/vhe/switch.c:225:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void kvm_unexpected_el2_exception(void)
^
static
2 warnings generated.
--
>> arch/arm64/kvm/hyp/nvhe/switch.c:264:17: warning: no previous prototype for function 'hyp_panic' [-Wmissing-prototypes]
void __noreturn hyp_panic(void)
^
arch/arm64/kvm/hyp/nvhe/switch.c:264:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __noreturn hyp_panic(void)
^
static
>> arch/arm64/kvm/hyp/nvhe/switch.c:286:17: warning: no previous prototype for function 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
asmlinkage void kvm_unexpected_el2_exception(void)
^
arch/arm64/kvm/hyp/nvhe/switch.c:286:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void kvm_unexpected_el2_exception(void)
^
static
2 warnings generated.
--
>> arch/arm64/kvm/hyp/nvhe/hyp-main.c:233:6: warning: no previous prototype for function 'handle_trap' [-Wmissing-prototypes]
void handle_trap(struct kvm_cpu_context *host_ctxt)
^
arch/arm64/kvm/hyp/nvhe/hyp-main.c:233:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void handle_trap(struct kvm_cpu_context *host_ctxt)
^
static
1 warning generated.
--
>> arch/arm64/kvm/hyp/nvhe/psci-relay.c:203:28: warning: no previous prototype for function 'kvm_host_psci_cpu_entry' [-Wmissing-prototypes]
asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
^
arch/arm64/kvm/hyp/nvhe/psci-relay.c:203:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
^
static
1 warning generated.
--
>> arch/arm64/kvm/hyp/nvhe/setup.c:146:17: warning: no previous prototype for function '__pkvm_init_finalise' [-Wmissing-prototypes]
void __noreturn __pkvm_init_finalise(void)
^
arch/arm64/kvm/hyp/nvhe/setup.c:146:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __noreturn __pkvm_init_finalise(void)
^
static
1 warning generated.

vim +/kvm_get_kimage_voffset +286 arch/arm64/kvm/va_layout.c

1db9d9ded77138 Marc Zyngier 2020-10-21 285
68b824e428c5fb Marc Zyngier 2020-10-24 @286 void kvm_get_kimage_voffset(struct alt_instr *alt,
68b824e428c5fb Marc Zyngier 2020-10-24 287 __le32 *origptr, __le32 *updptr, int nr_inst)
68b824e428c5fb Marc Zyngier 2020-10-24 288 {
68b824e428c5fb Marc Zyngier 2020-10-24 289 generate_mov_q(kimage_voffset, origptr, updptr, nr_inst);
68b824e428c5fb Marc Zyngier 2020-10-24 290 }
755db23420a1ce Marc Zyngier 2021-03-22 291
755db23420a1ce Marc Zyngier 2021-03-22 @292 void kvm_compute_final_ctr_el0(struct alt_instr *alt,

:::::: The code at line 286 was first introduced by commit
:::::: 68b824e428c5fb5c3dc5ef80b1543e767534b58e KVM: arm64: Patch kimage_voffset instead of loading the EL1 value

:::::: TO: Marc Zyngier <maz@xxxxxxxxxx>
:::::: CC: Marc Zyngier <maz@xxxxxxxxxx>

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

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