On Tue, Sep 08, 2015 at 01:52:45PM +0100, Mark Rutland wrote:
On Tue, Sep 08, 2015 at 01:43:34PM +0100, Leif Lindholm wrote:
We have multiple "earlycon" early_param handlers - merge the DT one into the main earlycon one. This means the earlycon early_param handler does not just return success if no options are specified.
Signed-off-by: Leif Lindholm leif.lindholm@linaro.org
drivers/of/fdt.c | 11 +---------- drivers/tty/serial/earlycon.c | 4 +++- include/linux/of_fdt.h | 1 + 3 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 6e82bc42..fcfc4c7 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -793,7 +793,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node) #ifdef CONFIG_SERIAL_EARLYCON extern struct of_device_id __earlycon_of_table[]; -static int __init early_init_dt_scan_chosen_serial(void) +int __init early_init_dt_scan_chosen_serial(void) { int offset; const char *p; @@ -834,15 +834,6 @@ 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 f096360..2bda09a 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> +#include <linux/of_fdt.h> #include <linux/serial_core.h> #include <linux/sizes.h> #include <linux/mod_devicetable.h> @@ -187,7 +188,8 @@ 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;
if (IS_ENABLED(CONFIG_OF_FLATTREE))return early_init_dt_scan_chosen_serial();err = setup_earlycon(buf); if (err == -ENOENT || err == -EALREADY) diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h index df9ef38..772c47c 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_serial(void);
I think you need a static inline stub to prevent link errors in !CONFIG_OF_FLATTREE kernels, as we do for early_init_fdt_scan_reserved_mem and friends.
Will add, thanks.
Mark.
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); -- 2.1.4