linux-kernel - arch/x86/kernel/paravirt.c:337:4: warning: cast from 'void (*)(struct mmu_gather *, struct page *)' to 'void (*)(struct mmu_gather *, void *)' converts to incompatible function type

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Message-ID: <202307260332.pJntWR6o-lkp@intel.com>
Date:   Wed, 26 Jul 2023 03:57:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>
Subject: arch/x86/kernel/paravirt.c:337:4: warning: cast from 'void
 (*)(struct mmu_gather *, struct page *)' to 'void (*)(struct mmu_gather *,
 void *)' converts to incompatible function type

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   af2e19389c2c1d8a299e04c5105b180ef0c5b5b5
commit: 552a23a0e5d0a84cecd4687043d8030673981d30 Makefile: Enable -Wcast-function-type
date:   1 year, 8 months ago
config: x86_64-randconfig-r003-20230725 (https://download.01.org/0day-ci/archive/20230726/202307260332.pJntWR6o-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230726/202307260332.pJntWR6o-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/202307260332.pJntWR6o-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/kernel/paravirt.c:107:13: warning: no previous prototype for function 'native_pv_lock_init' [-Wmissing-prototypes]
   void __init native_pv_lock_init(void)
               ^
   arch/x86/kernel/paravirt.c:107:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init native_pv_lock_init(void)
   ^
   static 
>> arch/x86/kernel/paravirt.c:337:4: warning: cast from 'void (*)(struct mmu_gather *, struct page *)' to 'void (*)(struct mmu_gather *, void *)' converts to incompatible function type [-Wcast-function-type-strict]
                           (void (*)(struct mmu_gather *, void *))tlb_remove_page,
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.


vim +337 arch/x86/kernel/paravirt.c

5c83511bdb9832 Juergen Gross   2018-08-28  330  
5c83511bdb9832 Juergen Gross   2018-08-28  331  	/* Mmu ops. */
2faf153bb7346b Thomas Gleixner 2020-04-21  332  	.mmu.flush_tlb_user	= native_flush_tlb_local,
5c83511bdb9832 Juergen Gross   2018-08-28  333  	.mmu.flush_tlb_kernel	= native_flush_tlb_global,
5c83511bdb9832 Juergen Gross   2018-08-28  334  	.mmu.flush_tlb_one_user	= native_flush_tlb_one_user,
4ce94eabac16b1 Nadav Amit      2021-02-20  335  	.mmu.flush_tlb_multi	= native_flush_tlb_multi,
5c83511bdb9832 Juergen Gross   2018-08-28  336  	.mmu.tlb_remove_table	=
5c83511bdb9832 Juergen Gross   2018-08-28 @337  			(void (*)(struct mmu_gather *, void *))tlb_remove_page,
5c83511bdb9832 Juergen Gross   2018-08-28  338  
fdc0269e8958a1 Juergen Gross   2018-08-28  339  	.mmu.exit_mmap		= paravirt_nop,
064ce6c550a063 Brijesh Singh   2021-08-24  340  	.mmu.notify_page_enc_status_changed	= paravirt_nop,
fdc0269e8958a1 Juergen Gross   2018-08-28  341  

:::::: The code at line 337 was first introduced by commit
:::::: 5c83511bdb9832c86be20fb86b783356e2f58062 x86/paravirt: Use a single ops structure

:::::: TO: Juergen Gross <jgross@...e.com>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki