lkml.org 
[lkml]   [2023]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] MIPS: vpe-mt: provide a default 'physical_memsize'
From
Hi,

On 2/13/23 23:40, Philippe Mathieu-Daudé wrote:
> Hi Randy,
>
> On 14/2/23 02:09, Randy Dunlap wrote:
>> When neither LANTIQ nor MIPS_MALTA is set, 'physical_memsize' is not
>> declared. This causes the build to fail with:
>>
>> mips-linux-ld: arch/mips/kernel/vpe-mt.o: in function `vpe_run':
>> arch/mips/kernel/vpe-mt.c:(.text.vpe_run+0x280): undefined reference to `physical_memsize'
>>
>> Fix this by declaring a 0-value physical_memsize with neither LANTIQ
>> nor MIPS_MALTA is set, like LANTIQ does.
>>
>> Fixes: 1a2a6d7e8816 ("MIPS: APRP: Split VPE loader into separate files.")
>> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Link: https://lore.kernel.org/all/202302030625.2g3E98sY-lkp@intel.com/
>> Cc: Dengcheng Zhu <dzhu@wavecomp.com>
>> Cc: John Crispin <john@phrozen.org>
>> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
>> Cc: linux-mips@vger.kernel.org
>> ---
>> How has this build error not been detected for 10 years?
>>
>>   arch/mips/kernel/vpe-mt.c |    9 +++++++++
>>   1 file changed, 9 insertions(+)
>>
>> diff -- a/arch/mips/kernel/vpe-mt.c b/arch/mips/kernel/vpe-mt.c
>> --- a/arch/mips/kernel/vpe-mt.c
>> +++ b/arch/mips/kernel/vpe-mt.c
>> @@ -22,6 +22,15 @@ static int major;
>>   /* The number of TCs and VPEs physically available on the core */
>>   static int hw_tcs, hw_vpes;
>>   +#if !defined(CONFIG_MIPS_MALTA) && !defined(CONFIG_LANTIQ)
>> +/* The 2 above provide their own 'physical_memsize' variable. */
>
> Which seems dubious. The variable should be defined once, likely in
> arch/mips/kernel/vpe-mt.c, since arch/mips/include/asm/vpe.h declares
> it.
>
> I'm surprised CONFIG_MIPS_MALTA always links malta-dtshim.o, but
> malta-dtshim.o depends on MIPS_VPE_LOADER_MT, and I can't find a
> CONFIG_MIPS_MALTA -> MIPS_VPE_LOADER_MT Kconfig dep.
>
>> +/*
>> + * This is needed by the vpe-mt loader code, just set it to 0 and assume
>> + * that the firmware hardcodes this value to something useful.
>> + */
>> +unsigned long physical_memsize = 0L;
>
> I agree this is where this variable has be be declared / initialized,
> but having this dependent on CONFIG_MIPS_MALTA/CONFIG_LANTIQ machines
> doesn't seem right.
>
>> +#endif
>> +
>>   /* We are prepared so configure and start the VPE... */
>>   int vpe_run(struct vpe *v)
>>   {

OK, I'll try to consolidate all of these into one location.

Thanks.
--
~Randy

\
 
 \ /
  Last update: 2023-03-27 00:23    [W:0.064 / U:1.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site