diff options
| -rw-r--r-- | kernel/printk.c | 2 | ||||
| -rw-r--r-- | lib/vsprintf.c | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index c3ab51dc9faf..fbd94bdaa74f 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -593,6 +593,8 @@ static int have_callable_console(void) * * See also: * printf(3) + * + * See the vsnprintf() documentation for format string extensions over C99. */ asmlinkage int printk(const char *fmt, ...) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index c399bc1093cb..4c6674a41ed9 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -565,6 +565,10 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field * @fmt: The format string to use * @args: Arguments for the format string * + * This function follows C99 vsnprintf, but has some extensions: + * %pS output the name of a text symbol + * %pF output the name of a function pointer + * * The return value is the number of characters which would * be generated for the given input, excluding the trailing * '\0', as per ISO C99. If you want to have the exact @@ -806,6 +810,8 @@ EXPORT_SYMBOL(vsnprintf); * * Call this function if you are already dealing with a va_list. * You probably want scnprintf() instead. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) { @@ -828,6 +834,8 @@ EXPORT_SYMBOL(vscnprintf); * generated for the given input, excluding the trailing null, * as per ISO C99. If the return is greater than or equal to * @size, the resulting string is truncated. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int snprintf(char * buf, size_t size, const char *fmt, ...) { @@ -877,6 +885,8 @@ EXPORT_SYMBOL(scnprintf); * * Call this function if you are already dealing with a va_list. * You probably want sprintf() instead. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int vsprintf(char *buf, const char *fmt, va_list args) { @@ -894,6 +904,8 @@ EXPORT_SYMBOL(vsprintf); * The function returns the number of characters written * into @buf. Use snprintf() or scnprintf() in order to avoid * buffer overflows. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int sprintf(char * buf, const char *fmt, ...) { |