[PATCH 5/5] riscv: mm: init: try best to remove #ifdef CONFIG_XIP_KERNEL usage
Alexandre ghiti
alex at ghiti.fr
Fri Dec 3 00:41:49 PST 2021
On 12/3/21 06:03, Jisheng Zhang wrote:
> Currently, the #ifdef CONFIG_XIP_KERNEL usage can be divided into the
> following three types:
>
> The first one is for functions/declarations only used in XIP case.
>
> The second one is for XIP_FIXUP case. Something as below:
> |foo_type foo;
> |#ifdef CONFIG_XIP_KERNEL
> |#define foo (*(foo_type *)XIP_FIXUP(&foo))
> |#endif
>
> Usually, it's better to let the foo macro sit with the foo var
> together. But if various foos are defined adjacently, we can
> save some #ifdef CONFIG_XIP_KERNEL usage by grouping them together.
>
> The third one is for different implementations for XIP, usually, this
> is a #ifdef...#else...#endif case.
>
> This patch moves the pt_ops macro to adjacent #ifdef CONFIG_XIP_KERNEL
> and group first usage case into one.
>
> Signed-off-by: Jisheng Zhang <jszhang at kernel.org>
> ---
> arch/riscv/mm/init.c | 11 +++--------
> 1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index 4a9e3f429042..aeae7d6b2fee 100644
> --- a/arch/riscv/mm/init.c
> +++ b/arch/riscv/mm/init.c
> @@ -40,10 +40,6 @@ EXPORT_SYMBOL(kernel_map);
> phys_addr_t phys_ram_base __ro_after_init;
> EXPORT_SYMBOL(phys_ram_base);
>
> -#ifdef CONFIG_XIP_KERNEL
> -extern char _xiprom[], _exiprom[], __data_loc;
> -#endif
> -
> unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
> __page_aligned_bss;
> EXPORT_SYMBOL(empty_zero_page);
> @@ -227,10 +223,6 @@ static void __init setup_bootmem(void)
> #ifdef CONFIG_MMU
> static struct pt_alloc_ops pt_ops __initdata;
>
> -#ifdef CONFIG_XIP_KERNEL
> -#define pt_ops (*(struct pt_alloc_ops *)XIP_FIXUP(&pt_ops))
> -#endif
> -
> unsigned long riscv_pfn_base __ro_after_init;
> EXPORT_SYMBOL(riscv_pfn_base);
>
> @@ -242,6 +234,7 @@ pgd_t early_pg_dir[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE);
> static pmd_t __maybe_unused early_dtb_pmd[PTRS_PER_PMD] __initdata __aligned(PAGE_SIZE);
>
> #ifdef CONFIG_XIP_KERNEL
> +#define pt_ops (*(struct pt_alloc_ops *)XIP_FIXUP(&pt_ops))
> #define trampoline_pg_dir ((pgd_t *)XIP_FIXUP(trampoline_pg_dir))
> #define fixmap_pte ((pte_t *)XIP_FIXUP(fixmap_pte))
> #define early_pg_dir ((pgd_t *)XIP_FIXUP(early_pg_dir))
> @@ -445,6 +438,8 @@ static uintptr_t __init best_map_size(phys_addr_t base, phys_addr_t size)
> }
>
> #ifdef CONFIG_XIP_KERNEL
> +extern char _xiprom[], _exiprom[], __data_loc;
> +
> /* called from head.S with MMU off */
> asmlinkage void __init __copy_data(void)
> {
Reviewed-by: Alexandre Ghiti <alex at ghiti.fr>
Thanks,
Alex
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