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authorLaura Abbott <lauraa@codeaurora.org>2014-11-26 00:14:16 +0000
committerWill Deacon <will.deacon@arm.com>2014-11-26 11:32:17 +0000
commitdab78b6dcb2bfc90038f35ada826844273dde4d6 (patch)
tree3d455e8b142703be84c3a8b4bce0bb5c8a4c8566 /arch
parentc9453a3ab1a39230a18b3db1d677bbb2bd782baa (diff)
downloadlinux-dab78b6dcb2bfc90038f35ada826844273dde4d6.tar.gz
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 <lauraa@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/fixmap.h1
1 files changed, 1 insertions, 0 deletions
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,