Re: [linux-next:master 11894/13554] arch/riscv/mm/ptdump.c:255:17: error: initialization of 'void (*)(struct ptdump_state *, long unsigned int, int, u64)' {aka 'void (*)(struct ptdump_state *, long unsigned int, int, long long unsigned int)'} from incompatible pointer type 'void (*)(struct ptdump_state *, long unsigned int, int, long unsigned int)'

[Andrew Morton <akpm@linux-foundation.org>]

On Sat, 30 May 2020 00:14:57 +0800 kbuild test robot <lkp@intel.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   ff387fc20c697cdc887b2abf7ef494e853795a2f
> commit: f6396a9ececda3fa26571ccd38167373db1d2ec3 [11894/13554] mm: ptdump: expand type of 'val' in note_page()
> config: riscv-allyesconfig (attached as .config)
> compiler: riscv64-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
>         git checkout f6396a9ececda3fa26571ccd38167373db1d2ec3
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>, old ones prefixed by <<):
> 
> arch/riscv/mm/ptdump.c: In function 'ptdump_walk':
> >> arch/riscv/mm/ptdump.c:255:17: error: initialization of 'void (*)(struct ptdump_state *, long unsigned int,  int,  u64)' {aka 'void (*)(struct ptdump_state *, long unsigned int,  int,  long long unsigned int)'} from incompatible pointer type 'void (*)(struct ptdump_state *, long unsigned int,  int,  long unsigned int)' [-Werror=incompatible-pointer-types]
> 255 |    .note_page = note_page,

Thanks.

--- a/arch/riscv/mm/ptdump.c~mm-ptdump-expand-type-of-val-in-note_page-fix
+++ a/arch/riscv/mm/ptdump.c
@@ -204,7 +204,7 @@ static void note_prot_wx(struct pg_state
 }
 
 static void note_page(struct ptdump_state *pt_st, unsigned long addr,
-		      int level, unsigned long val)
+		      int level, u64 val)
 {
 	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
 	u64 pa = PFN_PHYS(pte_pfn(__pte(val)));
_