[PATCH v3 4/5] arm64/mm: Make swapper_pg_dir smaller

[Jun Yao]

Make swapper_pg_dir smaller so we don't need to memblock_free() it.

Signed-off-by: Jun Yao <yaojun8558...@gmail.com>
---
 arch/arm64/kernel/vmlinux.lds.S | 2 +-
 arch/arm64/mm/mmu.c             | 8 --------
 2 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index d4fc68286a49..d69e11ad92e3 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -236,7 +236,7 @@ SECTIONS
        . += RESERVED_TTBR0_SIZE;
 #endif
        swapper_pg_dir = .;
-       . += SWAPPER_DIR_SIZE;
+       . += PAGE_SIZE;
        swapper_pg_end = .;
 
        __pecoff_data_size = ABSOLUTE(. - __initdata_begin);
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index a7ab0010ff80..a1e8fc624324 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -632,14 +632,6 @@ void __init paging_init(void)
        map_mem(swapper_pg_dir);
        cpu_replace_ttbr1(swapper_pg_dir);
        init_mm.pgd = swapper_pg_dir;
-
-       /*
-        * We only reuse the PGD from the swapper_pg_dir, not the pud + pmd
-        * allocated with it.
-        */
-       memblock_free(__pa_symbol(swapper_pg_dir) + PAGE_SIZE,
-                     __pa_symbol(swapper_pg_end) - __pa_symbol(swapper_pg_dir)
-                     - PAGE_SIZE);
 }
 
 /*
-- 
2.17.1