From: Chester Lin clin@suse.com

[ Upstream commit 1d31999cf04c21709f72ceb17e65b54a401330da ]

adjust_lowmem_bounds() checks every memblocks in order to find the boundary between lowmem and highmem. However some memblocks could be marked as NOMAP so they are not used by kernel, which should be skipped while calculating the boundary.

Signed-off-by: Chester Lin clin@suse.com Reviewed-by: Mike Rapoport rppt@linux.ibm.com Signed-off-by: Russell King rmk+kernel@armlinux.org.uk Signed-off-by: Lee Jones lee.jones@linaro.org --- arch/arm/mm/mmu.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index d5e0b908f0ba..25da9b2d9610 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1197,6 +1197,9 @@ void __init adjust_lowmem_bounds(void) phys_addr_t block_start = reg->base; phys_addr_t block_end = reg->base + reg->size;

+ if (memblock_is_nomap(reg)) + continue; + if (reg->base < vmalloc_limit) { if (block_end > lowmem_limit) /*