GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[PATCH] clean up kernel messages

Browse source 
Arrange for all kernel printks to be no-ops.  Only available if
CONFIG_EMBEDDED.

This patch saves about 375k on my laptop config and nearly 100k on minimal
configs.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Matt Mackall 2005-05-01 08:59:02 -07:00 • committed by Linus Torvalds
parent cd7619d6bf
commit d59745ce3e
4 changed files with 43 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

27
kernel/printk.c
View file

@ -85,10 +85,6 @@ static int console_locked;
*/
static DEFINE_SPINLOCK(logbuf_lock);
static char __log_buf[__LOG_BUF_LEN];
static char *log_buf = __log_buf;
static int log_buf_len = __LOG_BUF_LEN;
#define LOG_BUF_MASK (log_buf_len-1)
#define LOG_BUF(idx) (log_buf[(idx) & LOG_BUF_MASK])
@ -99,7 +95,6 @@ static int log_buf_len = __LOG_BUF_LEN;
static unsigned long log_start; /* Index into log_buf: next char to be read by syslog() */
static unsigned long con_start; /* Index into log_buf: next char to be sent to consoles */
static unsigned long log_end; /* Index into log_buf: most-recently-written-char + 1 */
static unsigned long logged_chars; /* Number of chars produced since last read+clear operation */
/*
* Array of consoles built from command line options (console=)
@ -120,6 +115,13 @@ static int preferred_console = -1;
/* Flag: console code may call schedule() */
static int console_may_schedule;
#ifdef CONFIG_PRINTK
static char __log_buf[__LOG_BUF_LEN];
static char *log_buf = __log_buf;
static int log_buf_len = __LOG_BUF_LEN;
static unsigned long logged_chars; /* Number of chars produced since last read+clear operation */
/*
* Setup a list of consoles. Called from init/main.c
*/
@ -535,6 +537,7 @@ __setup("time", printk_time_setup);
* then changes console_loglevel may break. This is because console_loglevel
* is inspected when the actual printing occurs.
*/
asmlinkage int printk(const char *fmt, ...)
{
va_list args;
@ -655,6 +658,18 @@ out:
EXPORT_SYMBOL(printk);
EXPORT_SYMBOL(vprintk);
#else
asmlinkage long sys_syslog(int type, char __user * buf, int len)
{
return 0;
}
int do_syslog(int type, char __user * buf, int len) { return 0; }
static void call_console_drivers(unsigned long start, unsigned long end) {}
#endif
/**
* acquire_console_sem - lock the console system for exclusive use.
*
@ -931,7 +946,7 @@ int unregister_console(struct console * console)
return res;
}
EXPORT_SYMBOL(unregister_console);
/**
* tty_write_message - write a message to a certain tty, not just the console.
*