[v3,1/2] powerpc/mm: Dump linux pagetables

[Christophe LEROY]

Hi Rashmica,

Le 17/11/2016 à 13:03, Michael Ellerman a écrit :
> On Fri, 2016-27-05 at 05:48:59 UTC, Rashmica Gupta wrote:
>> Useful to be able to dump the kernels page tables to check permissions
>> and memory types - derived from arm64's implementation.
>>
>> Add a debugfs file to check the page tables. To use this the PPC_PTDUMP
>> config option must be selected.
>>
>> Signed-off-by: Rashmica Gupta <rashmicy at gmail.com>
>
> Applied to powerpc next, thanks.
>
> https://git.kernel.org/powerpc/c/8eb07b187000d48152c4ef97f075bd

For your information, compilation fails on mpc885_ads_defconfig when we 
activate PPC_PTDUMP:

   CC      arch/powerpc/mm/dump_linuxpagetables.o
arch/powerpc/mm/dump_linuxpagetables.c: In function 'walk_pagetables':
arch/powerpc/mm/dump_linuxpagetables.c:369:10: error: 'KERN_VIRT_START' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:369:10: note: each undeclared 
identifier is reported only once for each function it appears in
arch/powerpc/mm/dump_linuxpagetables.c: In function 'populate_markers':
arch/powerpc/mm/dump_linuxpagetables.c:383:37: error: 'ISA_IO_BASE' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:384:37: error: 'ISA_IO_END' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:385:37: error: 'PHB_IO_BASE' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:386:37: error: 'PHB_IO_END' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:387:37: error: 'IOREMAP_BASE' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:388:37: error: 'IOREMAP_END' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c:392:38: error: 'VMEMMAP_BASE' 
undeclared (first use in this function)
arch/powerpc/mm/dump_linuxpagetables.c: In function 'ptdump_show':
arch/powerpc/mm/dump_linuxpagetables.c:400:20: error: 'KERN_VIRT_START' 
undeclared (first use in this function)
make[1]: *** [arch/powerpc/mm/dump_linuxpagetables.o] Error 1
make: *** [arch/powerpc/mm] Error 2



Christophe