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Subject[PATCH -mmotm] arm64: fix build for MAX_USER_VA_BITS
Date
Some code in 9b31cf493ff was lost during merging into the -mmotm tree
for some reasons,

In file included from ./arch/arm64/include/asm/processor.h:46,
from ./include/linux/rcupdate.h:43,
from ./include/linux/rculist.h:11,
from ./include/linux/pid.h:5,
from ./include/linux/sched.h:14,
from arch/arm64/kernel/asm-offsets.c:22:
./arch/arm64/include/asm/pgtable-hwdef.h:83:30: error:
'MAX_USER_VA_BITS' undeclared here (not in a function); did you mean
'MAX_USER_PRIO'?
#define PTRS_PER_PGD (1 << (MAX_USER_VA_BITS - PGDIR_SHIFT))
^~~~~~~~~~~~~~~~
./arch/arm64/include/asm/pgtable.h:442:26: note: in expansion of macro
'PTRS_PER_PGD'
extern pgd_t init_pg_dir[PTRS_PER_PGD];
^~~~~~~~~~~~

Signed-off-by: Qian Cai <cai@lca.pw>
---
arch/arm64/include/asm/memory.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 1df0bb19117f..e1ec947e7c0c 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -67,6 +67,12 @@
#define KERNEL_START _text
#define KERNEL_END _end

+#ifdef CONFIG_ARM64_USER_VA_BITS_52
+#define MAX_USER_VA_BITS 52
+#else
+#define MAX_USER_VA_BITS VA_BITS
+#endif
+
/*
* Generic and tag-based KASAN require 1/8th and 1/16th of the kernel virtual
* address space for the shadow region respectively. They can bloat the stack
--
2.17.2 (Apple Git-113)
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