Re: [hnaz-linux-mm:master 1/421] arch/powerpc/include/asm/mmu.h:139:22: error: unknown type name 'next_tlbcam_idx'

[Randy Dunlap <rdunlap@infradead.org>]

Hi,

I can't reproduce this with mmotm of 2020-08-25...

More below.

On 8/24/20 7:11 PM, kernel test robot wrote:
> tree:   https://github.com/hnaz/linux-mm master
> head:   2932a9e66c580f3c8d95ec27716d437198fb4c94
> commit: 4c4ef2c53a5e517248011bd1908235df1257e66d [1/421] origin
> config: powerpc-ppc64e_defconfig (attached as .config)
> compiler: powerpc64-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 4c4ef2c53a5e517248011bd1908235df1257e66d
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from arch/powerpc/include/asm/paca.h:18,
>                     from arch/powerpc/include/asm/percpu.h:13,
>                     from include/linux/random.h:14,
>                     from include/linux/net.h:18,
>                     from fs/cifs/netmisc.c:12:
>>> arch/powerpc/include/asm/mmu.h:139:22: error: unknown type name 'next_tlbcam_idx'

That's not a type name. It's a variable name. The type is 'int'.

>      139 | DECLARE_PER_CPU(int, next_tlbcam_idx);
>          |                      ^~~~~~~~~~~~~~~
> --
>    In file included from arch/powerpc/include/asm/paca.h:18,
>                     from arch/powerpc/include/asm/percpu.h:13,
>                     from include/linux/random.h:14,
>                     from include/linux/net.h:18,
>                     from fs/cifs/netmisc.c:12:
>>> arch/powerpc/include/asm/mmu.h:139:22: error: unknown type name 'next_tlbcam_idx'
>      139 | DECLARE_PER_CPU(int, next_tlbcam_idx);
>          |                      ^~~~~~~~~~~~~~~
>    In file included from fs/cifs/cifsglob.h:32,
>                     from fs/cifs/netmisc.c:22:
>    fs/cifs/smb2pdu.h:28:10: fatal error: cifsacl.h: No such file or directory
>       28 | #include <cifsacl.h>
>          |          ^~~~~~~~~~~

#include <cifsacl.h>

That probably could be changed to "cifsacl.h".

>    compilation terminated.
> 
> # https://github.com/hnaz/linux-mm/commit/4c4ef2c53a5e517248011bd1908235df1257e66d
> git remote add hnaz-linux-mm https://github.com/hnaz/linux-mm
> git fetch --no-tags hnaz-linux-mm master
> git checkout 4c4ef2c53a5e517248011bd1908235df1257e66d
> vim +/next_tlbcam_idx +139 arch/powerpc/include/asm/mmu.h
> 
> 7c03d653cd2577 Benjamin Herrenschmidt 2008-12-18  136  
> 3160b09796129a Becky Bruce            2011-06-28  137  #ifdef CONFIG_PPC_FSL_BOOK3E
> 3160b09796129a Becky Bruce            2011-06-28  138  #include <asm/percpu.h>
> 3160b09796129a Becky Bruce            2011-06-28 @139  DECLARE_PER_CPU(int, next_tlbcam_idx);
> 3160b09796129a Becky Bruce            2011-06-28  140  #endif
> 3160b09796129a Becky Bruce            2011-06-28  141  
> 
> :::::: The code at line 139 was first introduced by commit
> :::::: 3160b09796129abc9523ea3cd1633b0faba64a02 powerpc: Create next_tlbcam_idx percpu variable for FSL_BOOKE

It's surprising that a patch from 2011 would start showing problems now.

> :::::: TO: Becky Bruce <beckyb@kernel.crashing.org>
> :::::: CC: Kumar Gala <galak@kernel.crashing.org>


-- 
~Randy