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authorSteve Capper <steve.capper@arm.com>2017-12-04 14:13:05 +0000
committerWill Deacon <will.deacon@arm.com>2017-12-11 16:13:10 +0000
commitf24e5834a2c3f6c5f814a417f858226f0a010ade (patch)
tree6d0e21962aae019be211bff3b64ac80e3703b17e /arch
parent50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 (diff)
downloadlinux-f24e5834a2c3f6c5f814a417f858226f0a010ade.tar.bz2
arm64: Initialise high_memory global variable earlier
The high_memory global variable is used by cma_declare_contiguous(.) before it is defined. We don't notice this as we compute __pa(high_memory - 1), and it looks like we're processing a VA from the direct linear map. This problem becomes apparent when we flip the kernel virtual address space and the linear map is moved to the bottom of the kernel VA space. This patch moves the initialisation of high_memory before it used. Cc: <stable@vger.kernel.org> Fixes: f7426b983a6a ("mm: cma: adjust address limit to avoid hitting low/high memory boundary") Signed-off-by: Steve Capper <steve.capper@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/mm/init.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5960bef0170d..00e7b900ca41 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -476,6 +476,8 @@ void __init arm64_memblock_init(void)
reserve_elfcorehdr();
+ high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
+
dma_contiguous_reserve(arm64_dma_phys_limit);
memblock_allow_resize();
@@ -502,7 +504,6 @@ void __init bootmem_init(void)
sparse_init();
zone_sizes_init(min, max);
- high_memory = __va((max << PAGE_SHIFT) - 1) + 1;
memblock_dump_all();
}