diff options
| author | Laura Abbott <lauraa@codeaurora.org> | 2014-11-26 03:14:16 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-11-26 14:32:17 +0300 |
| commit | dab78b6dcb2bfc90038f35ada826844273dde4d6 (patch) | |
| tree | 3d455e8b142703be84c3a8b4bce0bb5c8a4c8566 /arch/arm64 | |
| parent | c9453a3ab1a39230a18b3db1d677bbb2bd782baa (diff) | |
| download | linux-dab78b6dcb2bfc90038f35ada826844273dde4d6.tar.xz | |
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/arm64')
| -rw-r--r-- | arch/arm64/include/asm/fixmap.h | 1 |
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, |