linux-kernel - arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202312091358.yxVj2uev-lkp@intel.com>
Date:   Sat, 9 Dec 2023 13:19:42 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in
 initializer (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f2e8a57ee9036c7d5443382b6c3c09b51a92ec7e
commit: 4ebbd075bcde7884e078d4360510b989f559bfec KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer read
date:   2 years ago
config: powerpc-randconfig-r113-20231106 (https://download.01.org/0day-ci/archive/20231209/202312091358.yxVj2uev-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231209/202312091358.yxVj2uev-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312091358.yxVj2uev-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:846:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:846:9: sparse:     got unsigned long long *
>> arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:846:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:846:9: sparse:     got unsigned long long *
>> arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:846:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:846:9: sparse:     got unsigned long long *
>> arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:846:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:846:9: sparse:     got unsigned long long *
>> arch/powerpc/kernel/time.c:846:9: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:846:9: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:846:9: sparse:     got unsigned long long *
   arch/powerpc/kernel/time.c:557:24: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got unsigned long long * @@
   arch/powerpc/kernel/time.c:557:24: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/powerpc/kernel/time.c:557:24: sparse:     got unsigned long long *

vim +846 arch/powerpc/kernel/time.c

4a4cfe3836916e Tony Breeds            2007-09-22  842  
d831d0b83f2058 Tony Breeds            2007-09-21  843  static int decrementer_set_next_event(unsigned long evt,
d831d0b83f2058 Tony Breeds            2007-09-21  844  				      struct clock_event_device *dev)
d831d0b83f2058 Tony Breeds            2007-09-21  845  {
6601ec1c2ba929 Christophe Leroy       2020-09-29 @846  	__this_cpu_write(decrementers_next_tb, get_tb() + evt);
d831d0b83f2058 Tony Breeds            2007-09-21  847  	set_dec(evt);
0215f7d8c53fb1 Benjamin Herrenschmidt 2014-01-14  848  
0215f7d8c53fb1 Benjamin Herrenschmidt 2014-01-14  849  	/* We may have raced with new irq work */
0215f7d8c53fb1 Benjamin Herrenschmidt 2014-01-14  850  	if (test_irq_work_pending())
0215f7d8c53fb1 Benjamin Herrenschmidt 2014-01-14  851  		set_dec(1);
0215f7d8c53fb1 Benjamin Herrenschmidt 2014-01-14  852  
d831d0b83f2058 Tony Breeds            2007-09-21  853  	return 0;
d831d0b83f2058 Tony Breeds            2007-09-21  854  }
d831d0b83f2058 Tony Breeds            2007-09-21  855  

:::::: The code at line 846 was first introduced by commit
:::::: 6601ec1c2ba929430f5585ce7f9d9960b0e0a01d powerpc: Remove get_tb_or_rtc()

:::::: TO: Christophe Leroy <christophe.leroy@...roup.eu>
:::::: CC: Michael Ellerman <mpe@...erman.id.au>

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