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printk: remove used-once early_vprintk

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Eliminate the unlikely possibility of message interleaving for
early_printk/early_vprintk use.

early_vprintk can be done via the %pV extension so remove this
unnecessary function and change early_printk to have the equivalent
vprintk code.

All uses of early_printk already end with a newline so also remove the
unnecessary newline from the early_printk function.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2014-12-10 15:45:53 -08:00 committed by Linus Torvalds
parent 9e3961a097
commit 1dc6244bd6
3 changed files with 21 additions and 18 deletions
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19
arch/tile/kernel/early_printk.c
View File

@ -43,13 +43,20 @@ static struct console early_hv_console = {
void early_panic(const char *fmt, ...)
{
va_list ap;
struct va_format vaf;
va_list args;
arch_local_irq_disable_all();
va_start(ap, fmt);
early_printk("Kernel panic - not syncing: ");
early_vprintk(fmt, ap);
early_printk("\n");
va_end(ap);
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
early_printk("Kernel panic - not syncing: %pV", &vaf);
va_end(args);
dump_stack();
hv_halt();
}

1
include/linux/printk.h
View File

@ -118,7 +118,6 @@ int no_printk(const char *fmt, ...)
#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, ...) { }

19
kernel/printk/printk.c
View File

@ -1881,23 +1881,20 @@ static size_t cont_print_text(char *text, size_t size) { return 0; }
#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 __visible void early_printk(const char *fmt, ...)
{
va_list ap;
char buf[512];
int n;
if (!early_console)
return;
va_start(ap, fmt);
early_vprintk(fmt, ap);
n = vscnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
early_console->write(early_console, buf, n);
}
#endif