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Commit 3f973e22 authored by Nicolas Pitre's avatar Nicolas Pitre
Browse files

[ARM] ignore high memory with VIPT aliasing caches 



VIPT aliasing caches have issues of their own which are not yet handled.
Usage of discard_old_kernel_data() in copypage-v6.c is not highmem ready,
kmap/fixmap stuff doesn't take account of cache colouring, etc.
If/when those issues are handled then this could be reverted.

Signed-off-by: default avatarNicolas Pitre <nico@marvell.com>
parent 3902a15e

arch/arm/mm/mmu.c

+5 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <asm/cputype.h>

#include <asm/mach-types.h>

#include <asm/sections.h>

#include <asm/cachetype.h>

#include <asm/setup.h>

#include <asm/sizes.h>

#include <asm/tlb.h>
@@ -678,6 +679,10 @@ static void __init sanity_check_meminfo(void) 
			if (meminfo.nr_banks >= NR_BANKS) {

				printk(KERN_CRIT "NR_BANKS too low, "

						 "ignoring high memory\n");

			} else if (cache_is_vipt_aliasing()) {

				printk(KERN_CRIT "HIGHMEM is not yet supported "

						 "with VIPT aliasing cache, "

						 "ignoring high memory\n");

			} else {

				memmove(bank + 1, bank,

					(meminfo.nr_banks - i) * sizeof(*bank));