On Thu, Mar 31, 2016 at 04:40:23PM +0300, Aleksey Makarov wrote:
> From: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
>
> We have multiple "earlycon" early_param handlers - merge the DT one into
> the main earlycon one. It's a cleanup that also will be useful
> to defer setting up DT console until ACPI/DT decision is made.
>
> Rename the exported function to avoid clashing with the function from
> arch/microblaze/kernel/prom.c
>
> Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
> Signed-off-by: Aleksey Makarov <aleksey.makarov@xxxxxxxxxx>
> Acked-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> drivers/of/fdt.c | 11 +----------
> drivers/tty/serial/earlycon.c | 2 +-
> include/linux/of_fdt.h | 2 ++
> 3 files changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
> index 3349d2a..b50f775 100644
> --- a/drivers/of/fdt.c
> +++ b/drivers/of/fdt.c
> @@ -805,7 +805,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
>
> #ifdef CONFIG_SERIAL_EARLYCON
>
> -static int __init early_init_dt_scan_chosen_serial(void)
> +int __init early_init_dt_scan_chosen_stdout(void)
> {
> int offset;
> const char *p, *q, *options = NULL;
> @@ -849,15 +849,6 @@ static int __init early_init_dt_scan_chosen_serial(void)
> }
> return -ENODEV;
> }
> -
> -static int __init setup_of_earlycon(char *buf)
> -{
> - if (buf)
> - return 0;
> -
> - return early_init_dt_scan_chosen_serial();
> -}
> -early_param("earlycon", setup_of_earlycon);
> #endif
>
> /**
> diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
> index 067783f..7aae655 100644
> --- a/drivers/tty/serial/earlycon.c
> +++ b/drivers/tty/serial/earlycon.c
> @@ -209,7 +209,7 @@ static int __init param_setup_earlycon(char *buf)
> * don't generate a warning from parse_early_params() in that case
> */
> if (!buf || !buf[0])
> - return 0;
> + return early_init_dt_scan_chosen_stdout();
>
> err = setup_earlycon(buf);
> if (err == -ENOENT || err == -EALREADY)
> diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
> index 2fbe868..5cfe322 100644
> --- a/include/linux/of_fdt.h
> +++ b/include/linux/of_fdt.h
> @@ -63,6 +63,7 @@ extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
> int depth, void *data);
> extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
> int depth, void *data);
> +extern int early_init_dt_scan_chosen_stdout(void);
> extern void early_init_fdt_scan_reserved_mem(void);
> extern void early_init_fdt_reserve_self(void);
> extern void early_init_dt_add_memory_arch(u64 base, u64 size);
> @@ -91,6 +92,7 @@ extern void early_get_first_memblock_info(void *, phys_addr_t *);
> extern u64 of_flat_dt_translate_address(unsigned long node);
> extern void of_fdt_limit_memory(int limit);
> #else /* CONFIG_OF_FLATTREE */
> +static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
Doesn't this change the default logic? Today you are returning 0 if you
don't have this config option set, and now you return -ENODEV, did you
test this out?
thanks,
greg k-h
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