early_printk: consolidate random copies of identical code

The early console implementations are the same all over the place.  Move
the print function to kernel/printk and get rid of the copies.

[[email protected]: arch/mips/kernel/early_printk.c needs kernel.h for va_list]
[[email protected]: sh4: make the bios early console support depend on EARLY_PRINTK]
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Paul Gortmaker <[email protected]>
Cc: Russell King <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Richard Weinberger <[email protected]>
Reviewed-by: Ingo Molnar <[email protected]>
Tested-by: Paul Gortmaker <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/um/kernel/early_printk.c b/arch/um/kernel/early_printk.c
index 49480f092456..4a0800bc37b2 100644
--- a/arch/um/kernel/early_printk.c
+++ b/arch/um/kernel/early_printk.c
@@ -16,7 +16,7 @@ static void early_console_write(struct console *con, const char *s, unsigned int
 	um_early_printk(s, n);
 }
 
-static struct console early_console = {
+static struct console early_console_dev = {
 	.name = "earlycon",
 	.write = early_console_write,
 	.flags = CON_BOOT,
@@ -25,8 +25,10 @@ static struct console early_console = {
 
 static int __init setup_early_printk(char *buf)
 {
-	register_console(&early_console);
-
+	if (!early_console) {
+		early_console = &early_console_dev;
+		register_console(&early_console_dev);
+	}
 	return 0;
 }