[PATCH 5/7] ARM: re-implement physical address space switching

[Nishanth Menon]

On Mon, May 11, 2015 at 2:59 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Mon, May 11, 2015 at 01:58:32PM -0500, Nishanth Menon wrote:
>> On 05/06/2015 05:30 AM, Russell King wrote:
>> [...]
>> > @@ -1436,75 +1435,32 @@ void __init early_paging_init(const struct machine_desc *mdesc,
>>
>> [...]
>> > -   /* Finally flush any stale TLB values. */
>> > -   local_flush_bp_all();
>> > -   local_flush_tlb_all();
>> > +   /* Re-enable the caches and cacheable TLB walks */
>> > +   asm volatile("mcr p15, 0, %0, c2, c0, 2" : : "ttbcr");
>> ^^
>> on next-20150511, echo
>> "CONFIG_ARM_LPAE=y">>arch/arm/configs/multi_v7_defconfig ;make
>> multi_v7_defconfig;make arch/arm/mm/mmu.o
>> #
>> # configuration written to .config
>> #
>> scripts/kconfig/conf  --silentoldconfig Kconfig
>>
>> <snip>
>>   CC      arch/arm/mm/mmu.o
>> arch/arm/mm/mmu.c: In function ‘early_paging_init’:
>> arch/arm/mm/mmu.c:1461:54: error: expected ‘(’ before ‘)’ token
>> make[1]: *** [arch/arm/mm/mmu.o] Error 1
>> make: *** [arch/arm/mm/mmu.o] Error 2
>> this was using [1]
>
> That's why I said I'd send you an updated version.  Just replace the
> "ttbcr" with "r" (ttbcr)...

Was reporting regression on 20150511. 20150512 seems to have built fine.

---
Regards,
Nishanth Menon