arm64: mm: free __init memory via the linear mapping

The implementation of free_initmem_default() expects __init_begin
and __init_end to be covered by the linear mapping, which is no
longer the case. So open code it instead, using addresses that are
explicitly translated from kernel virtual to linear virtual.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 82ced5fa1e667431ad1d1c1ac96486f1948f5239..89376f3c65a3d3f0cb23a0b89afbadf0c3fbf48c 100644 (file)
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -452,7 +452,8 @@ void __init mem_init(void)
 
 void free_initmem(void)
 {
-       free_initmem_default(0);
+       free_reserved_area(__va(__pa(__init_begin)), __va(__pa(__init_end)),
+                          0, "unused kernel");
        fixup_init();
 }