From dab78b6dcb2bfc90038f35ada826844273dde4d6 Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Wed, 26 Nov 2014 00:14:16 +0000 Subject: [PATCH] arm64: Add FIX_HOLE to permanent fixed addresses Every other architecture with permanent fixed addresses has FIX_HOLE as the first entry. This seems to be designed as a debugging aid but there are a couple of side effects of not having FIX_HOLE: - If the first fixed address is 0, fix_to_virt -> virt_to_fix triggers a BUG_ON for the virtual address being equal to FIXADDR_TOP - fix_to_virt may return a value outside of FIXADDR_START and FIXADDR_TOP which may look like a bug to a developer. Match up with other architectures and make everything clearer by adding FIX_HOLE. Signed-off-by: Laura Abbott Signed-off-by: Will Deacon --- arch/arm64/include/asm/fixmap.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h index db26a2f2b7a7..9ef6eca905ca 100644 --- a/arch/arm64/include/asm/fixmap.h +++ b/arch/arm64/include/asm/fixmap.h @@ -31,6 +31,7 @@ * */ enum fixed_addresses { + FIX_HOLE, FIX_EARLYCON_MEM_BASE, __end_of_permanent_fixed_addresses, -- 2.30.2