Commit d0380e6c authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Linus Torvalds
Browse files

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.

[akpm@linux-foundation.org: arch/mips/kernel/early_printk.c needs kernel.h for va_list]
[paul.gortmaker@windriver.com: sh4: make the bios early console support depend on EARLY_PRINTK]
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: default avatarMike Frysinger <vapier@gentoo.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Richard Weinberger <richard@nod.at>
Reviewed-by: default avatarIngo Molnar <mingo@kernel.org>
Tested-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 07c65f4d
......@@ -29,28 +29,17 @@ static void early_console_write(struct console *con, const char *s, unsigned n)
early_write(s, n);
}
static struct console early_console = {
static struct console early_console_dev = {
.name = "earlycon",
.write = early_console_write,
.flags = CON_PRINTBUFFER | CON_BOOT,
.index = -1,
};
asmlinkage void early_printk(const char *fmt, ...)
{
char buf[512];
int n;
va_list ap;
va_start(ap, fmt);
n = vscnprintf(buf, sizeof(buf), fmt, ap);
early_write(buf, n);
va_end(ap);
}
static int __init setup_early_printk(char *buf)
{
register_console(&early_console);
early_console = &early_console_dev;
register_console(&early_console_dev);
return 0;
}
......
......@@ -25,8 +25,6 @@ extern struct console *bfin_earlyserial_init(unsigned int port,
extern struct console *bfin_jc_early_init(void);
#endif
static struct console *early_console;
/* Default console */
#define DEFAULT_PORT 0
#define DEFAULT_CFLAG CS8|B57600
......
......@@ -21,7 +21,6 @@
#include <asm/setup.h>
#include <asm/prom.h>
static u32 early_console_initialized;
static u32 base_addr;
#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
......@@ -109,27 +108,11 @@ static struct console early_serial_uart16550_console = {
};
#endif /* CONFIG_SERIAL_8250_CONSOLE */
static struct console *early_console;
void early_printk(const char *fmt, ...)
{
char buf[512];
int n;
va_list ap;
if (early_console_initialized) {
va_start(ap, fmt);
n = vscnprintf(buf, 512, fmt, ap);
early_console->write(early_console, buf, n);
va_end(ap);
}
}
int __init setup_early_printk(char *opt)
{
int version = 0;
if (early_console_initialized)
if (early_console)
return 1;
base_addr = of_early_console(&version);
......@@ -159,7 +142,6 @@ int __init setup_early_printk(char *opt)
}
register_console(early_console);
early_console_initialized = 1;
return 0;
}
return 1;
......@@ -169,7 +151,7 @@ int __init setup_early_printk(char *opt)
* only for early console because of performance degression */
void __init remap_early_printk(void)
{
if (!early_console_initialized || !early_console)
if (!early_console)
return;
pr_info("early_printk_console remapping from 0x%x to ", base_addr);
base_addr = (u32) ioremap(base_addr, PAGE_SIZE);
......@@ -194,9 +176,9 @@ void __init remap_early_printk(void)
void __init disable_early_printk(void)
{
if (!early_console_initialized || !early_console)
if (!early_console)
return;
pr_warn("disabling early console\n");
unregister_console(early_console);
early_console_initialized = 0;
early_console = NULL;
}
......@@ -7,7 +7,9 @@
* Copyright (C) 2007 MIPS Technologies, Inc.
* written by Ralf Baechle (ralf@linux-mips.org)
*/
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/printk.h>
#include <linux/init.h>
#include <asm/setup.h>
......@@ -24,20 +26,18 @@ static void early_console_write(struct console *con, const char *s, unsigned n)
}
}
static struct console early_console = {
static struct console early_console_prom = {
.name = "early",
.write = early_console_write,
.flags = CON_PRINTBUFFER | CON_BOOT,
.index = -1
};
static int early_console_initialized __initdata;
void __init setup_early_printk(void)
{
if (early_console_initialized)
if (early_console)
return;
early_console_initialized = 1;
early_console = &early_console_prom;
register_console(&early_console);
register_console(&early_console_prom);
}
......@@ -156,15 +156,13 @@ static struct console udbg_console = {
.index = 0,
};
static int early_console_initialized;
/*
* Called by setup_system after ppc_md->probe and ppc_md->early_init.
* Call it again after setting udbg_putc in ppc_md->setup_arch.
*/
void __init register_early_udbg_console(void)
{
if (early_console_initialized)
if (early_console)
return;
if (!udbg_putc)
......@@ -174,7 +172,7 @@ void __init register_early_udbg_console(void)
printk(KERN_INFO "early console immortal !\n");
udbg_console.flags &= ~CON_BOOT;
}
early_console_initialized = 1;
early_console = &udbg_console;
register_console(&udbg_console);
}
......
......@@ -104,6 +104,7 @@ void sh_bios_vbr_reload(void)
);
}
#ifdef CONFIG_EARLY_PRINTK
/*
* Print a string through the BIOS
*/
......@@ -144,8 +145,6 @@ static struct console bios_console = {
.index = -1,
};
static struct console *early_console;
static int __init setup_early_printk(char *buf)
{
int keep_early = 0;
......@@ -170,3 +169,4 @@ static int __init setup_early_printk(char *buf)
return 0;
}
early_param("earlyprintk", setup_early_printk);
#endif
......@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/string.h>
#include <linux/irqflags.h>
#include <linux/printk.h>
#include <asm/setup.h>
#include <hv/hypervisor.h>
......@@ -33,25 +34,8 @@ static struct console early_hv_console = {
};
/* Direct interface for emergencies */
static struct console *early_console = &early_hv_console;
static int early_console_initialized;
static int early_console_complete;
static void early_vprintk(const char *fmt, va_list ap)
{
char buf[512];
int n = vscnprintf(buf, sizeof(buf), fmt, ap);
early_console->write(early_console, buf, n);
}
void early_printk(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
early_vprintk(fmt, ap);
va_end(ap);
}
void early_panic(const char *fmt, ...)
{
va_list ap;
......@@ -69,14 +53,13 @@ static int __initdata keep_early;
static int __init setup_early_printk(char *str)
{
if (early_console_initialized)
if (early_console)
return 1;
if (str != NULL && strncmp(str, "keep", 4) == 0)
keep_early = 1;
early_console = &early_hv_console;
early_console_initialized = 1;
register_console(early_console);
return 0;
......@@ -85,12 +68,12 @@ static int __init setup_early_printk(char *str)
void __init disable_early_printk(void)
{
early_console_complete = 1;
if (!early_console_initialized || !early_console)
if (!early_console)
return;
if (!keep_early) {
early_printk("disabling early console\n");
unregister_console(early_console);
early_console_initialized = 0;
early_console = NULL;
} else {
early_printk("keeping early console\n");
}
......@@ -98,7 +81,7 @@ void __init disable_early_printk(void)
void warn_early_printk(void)
{
if (early_console_complete || early_console_initialized)
if (early_console_complete || early_console)
return;
early_printk("\
Machine shutting down before console output is fully initialized.\n\
......
......@@ -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;
}
......
......@@ -33,21 +33,17 @@ static struct console early_ocd_console = {
.index = -1,
};
/* Direct interface for emergencies */
static struct console *early_console = &early_ocd_console;
static int __initdata keep_early;
static int __init setup_early_printk(char *buf)
{
if (!buf)
int keep_early;
if (!buf || early_console)
return 0;
if (strstr(buf, "keep"))
keep_early = 1;
if (!strncmp(buf, "ocd", 3))
early_console = &early_ocd_console;
early_console = &early_ocd_console;
if (keep_early)
early_console->flags &= ~CON_BOOT;
......
......@@ -169,25 +169,9 @@ static struct console early_serial_console = {
.index = -1,
};
/* Direct interface for emergencies */
static struct console *early_console = &early_vga_console;
static int __initdata early_console_initialized;
asmlinkage void early_printk(const char *fmt, ...)
{
char buf[512];
int n;
va_list ap;
va_start(ap, fmt);
n = vscnprintf(buf, sizeof(buf), fmt, ap);
early_console->write(early_console, buf, n);
va_end(ap);
}
static inline void early_console_register(struct console *con, int keep_early)
{
if (early_console->index != -1) {
if (con->index != -1) {
printk(KERN_CRIT "ERROR: earlyprintk= %s already used\n",
con->name);
return;
......@@ -207,9 +191,8 @@ static int __init setup_early_printk(char *buf)
if (!buf)
return 0;
if (early_console_initialized)
if (early_console)
return 0;
early_console_initialized = 1;
keep = (strstr(buf, "keep") != NULL);
......
......@@ -141,6 +141,7 @@ struct console {
for (con = console_drivers; con != NULL; con = con->next)
extern int console_set_on_cmdline;
extern struct console *early_console;
extern int add_preferred_console(char *name, int idx, char *options);
extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
......
......@@ -95,8 +95,14 @@ int no_printk(const char *fmt, ...)
return 0;
}
#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1, 2)
void early_printk(const char *fmt, ...);
void early_vprintk(const char *fmt, va_list ap);
#else
static inline __printf(1, 2) __cold
void early_printk(const char *s, ...) { }
#endif
#ifdef CONFIG_PRINTK
asmlinkage __printf(5, 0)
......
......@@ -49,13 +49,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/printk.h>
/*
* Architectures can override it:
*/
void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
{
}
/* printk's without a loglevel use this.. */
#define DEFAULT_MESSAGE_LOGLEVEL CONFIG_DEFAULT_MESSAGE_LOGLEVEL
......@@ -1723,6 +1716,29 @@ static size_t cont_print_text(char *text, size_t size) { return 0; }
#endif /* CONFIG_PRINTK */
#ifdef CONFIG_EARLY_PRINTK
struct console *early_console;
void early_vprintk(const char *fmt, va_list ap)
{
if (early_console) {
char buf[512];
int n = vscnprintf(buf, sizeof(buf), fmt, ap);
early_console->write(early_console, buf, n);
}
}
asmlinkage void early_printk(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
early_vprintk(fmt, ap);
va_end(ap);
}
#endif
static int __add_preferred_console(char *name, int idx, char *options,
char *brl_options)
{
......
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