[PATCH] arm64: Add FIX_HOLE to permanent fixed addresses

Laura Abbott lauraa at codeaurora.org
Tue Nov 25 16:14:16 PST 2014

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
- 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 <lauraa at codeaurora.org>
 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 5f7bfe6..424a10f 100644
--- a/arch/arm64/include/asm/fixmap.h
+++ b/arch/arm64/include/asm/fixmap.h
@@ -31,6 +31,7 @@
 enum fixed_addresses {
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