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SubjectRe: [PATCH v2 6/6] RISC-V: Implement keepinitrd kernel parameter
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On Sat, 19 Jan 2019 05:28:59 PST (-0800), Anup.Patel@wdc.com wrote:
> This patch implements keepinitrd kernel parameter. By default,
> keepinitrd=1 but users can pass "keepinitrd=0" to free-up
> initrd memory at boot-time in free_initrd_mem() function.
>
> The keepinitrd kernel parameter is already implemented by
> unicore32, arm, and arm64 architectures and it is documented
> at: Documentation/admin-guide/kernel-parameters.txt

All I see is

"

keepinitrd [HW,ARM]

"

which is pretty lacking for documentation and should be improved...

I'm happy to take this as it stands for the next merge window, as if you hadn't
mentioned documentation then I wouldn't have looked :)

> Signed-off-by: Anup Patel <anup.patel@wdc.com>
> ---
> arch/riscv/kernel/setup.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
> index 9cd583b6d1cd..46e547dd8245 100644
> --- a/arch/riscv/kernel/setup.c
> +++ b/arch/riscv/kernel/setup.c
> @@ -97,8 +97,20 @@ static void __init setup_initrd(void)
> initrd_end = 0;
> }
>
> -void free_initrd_mem(unsigned long start, unsigned long end)
> +static int keep_initrd __initdata;
> +
> +static int __init keepinitrd_setup(char *__unused)
> +{
> + keep_initrd = 1;
> + return 1;
> +}
> +
> +__setup("keepinitrd", keepinitrd_setup);
> +
> +void __init free_initrd_mem(unsigned long start, unsigned long end)
> {
> + if (!keep_initrd)
> + memblock_free(__pa(start), end - start);
> }
> #endif /* CONFIG_BLK_DEV_INITRD */
>
> --
> 2.17.1

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