arm64 does not support early_memremap/memunmap/ioremap/iounmap after
paging_init() has been called. The core early_*remap code handles this
via the after_paging_init variable, which is set by a call to
early_ioremap_reset().
However, arm64 currently does not call early_ioremap_reset(), which
has made it possible to poke around in the fixmap region after kmap
is enabled. Add the required call.
Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
Fixes: bf4b558eba92 ("arm64: add early_ioremap support")
Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
arch/arm64/mm/mmu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 6032f3e..506544f 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -348,6 +348,7 @@ void __init paging_init(void)
{
void *zero_page;
+ early_ioremap_reset();
map_mem();
/*
--
2.1.3
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