Hi Jun, On 02/07/18 12:16, Jun Yao wrote: > Make swapper_pg_dir smaller so we don't need to memblock_free() it.
Patch looks good, but could the commit message explain why its now safe to do this? Thanks, James > 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); > } > > /* >
