Merge branch 'core/printk' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...
[linux-2.6.git] / kernel / printk.c
index 5d81a11..07ad9e7 100644 (file)
@@ -38,7 +38,7 @@
 /*
  * Architectures can override it:
  */
-void __attribute__((weak)) early_printk(const char *fmt, ...)
+void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
 {
 }
 
@@ -235,7 +235,7 @@ static inline void boot_delay_msec(void)
 /*
  * Return the number of unread characters in the log buffer.
  */
-int log_buf_get_len(void)
+static int log_buf_get_len(void)
 {
        return logged_chars;
 }
@@ -272,19 +272,6 @@ int log_buf_copy(char *dest, int idx, int len)
 }
 
 /*
- * Extract a single character from the log buffer.
- */
-int log_buf_read(int idx)
-{
-       char ret;
-
-       if (log_buf_copy(&ret, idx, 1) == 1)
-               return ret;
-       else
-               return -1;
-}
-
-/*
  * Commands to do_syslog:
  *
  *     0 -- Close the log.  Currently a NOP.
@@ -669,18 +656,17 @@ static int acquire_console_semaphore_for_printk(unsigned int cpu)
        spin_unlock(&logbuf_lock);
        return retval;
 }
-
-static const char printk_recursion_bug_msg [] =
-                       KERN_CRIT "BUG: recent printk recursion!\n";
-static int printk_recursion_bug;
+static const char recursion_bug_msg [] =
+               KERN_CRIT "BUG: recent printk recursion!\n";
+static int recursion_bug;
+       static int new_text_line = 1;
+static char printk_buf[1024];
 
 asmlinkage int vprintk(const char *fmt, va_list args)
 {
-       static int log_level_unknown = 1;
-       static char printk_buf[1024];
-
-       unsigned long flags;
        int printed_len = 0;
+       int current_log_level = default_message_loglevel;
+       unsigned long flags;
        int this_cpu;
        char *p;
 
@@ -703,7 +689,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
                 * it can be printed at the next appropriate moment:
                 */
                if (!oops_in_progress) {
-                       printk_recursion_bug = 1;
+                       recursion_bug = 1;
                        goto out_restore_irqs;
                }
                zap_locks();
@@ -713,70 +699,62 @@ asmlinkage int vprintk(const char *fmt, va_list args)
        spin_lock(&logbuf_lock);
        printk_cpu = this_cpu;
 
-       if (printk_recursion_bug) {
-               printk_recursion_bug = 0;
-               strcpy(printk_buf, printk_recursion_bug_msg);
-               printed_len = sizeof(printk_recursion_bug_msg);
+       if (recursion_bug) {
+               recursion_bug = 0;
+               strcpy(printk_buf, recursion_bug_msg);
+               printed_len = sizeof(recursion_bug_msg);
        }
        /* Emit the output into the temporary buffer */
        printed_len += vscnprintf(printk_buf + printed_len,
                                  sizeof(printk_buf) - printed_len, fmt, args);
 
+
        /*
         * Copy the output into log_buf.  If the caller didn't provide
         * appropriate log level tags, we insert them here
         */
        for (p = printk_buf; *p; p++) {
-               if (log_level_unknown) {
-                        /* log_level_unknown signals the start of a new line */
+               if (new_text_line) {
+                       /* If a token, set current_log_level and skip over */
+                       if (p[0] == '<' && p[1] >= '0' && p[1] <= '7' &&
+                           p[2] == '>') {
+                               current_log_level = p[1] - '0';
+                               p += 3;
+                               printed_len -= 3;
+                       }
+
+                       /* Always output the token */
+                       emit_log_char('<');
+                       emit_log_char(current_log_level + '0');
+                       emit_log_char('>');
+                       printed_len += 3;
+                       new_text_line = 0;
+
                        if (printk_time) {
-                               int loglev_char;
+                               /* Follow the token with the time */
                                char tbuf[50], *tp;
                                unsigned tlen;
                                unsigned long long t;
                                unsigned long nanosec_rem;
 
-                               /*
-                                * force the log level token to be
-                                * before the time output.
-                                */
-                               if (p[0] == '<' && p[1] >='0' &&
-                                  p[1] <= '7' && p[2] == '>') {
-                                       loglev_char = p[1];
-                                       p += 3;
-                                       printed_len -= 3;
-                               } else {
-                                       loglev_char = default_message_loglevel
-                                               + '0';
-                               }
                                t = cpu_clock(printk_cpu);
                                nanosec_rem = do_div(t, 1000000000);
-                               tlen = sprintf(tbuf,
-                                               "<%c>[%5lu.%06lu] ",
-                                               loglev_char,
-                                               (unsigned long)t,
-                                               nanosec_rem/1000);
+                               tlen = sprintf(tbuf, "[%5lu.%06lu] ",
+                                               (unsigned long) t,
+                                               nanosec_rem / 1000);
 
                                for (tp = tbuf; tp < tbuf + tlen; tp++)
                                        emit_log_char(*tp);
                                printed_len += tlen;
-                       } else {
-                               if (p[0] != '<' || p[1] < '0' ||
-                                  p[1] > '7' || p[2] != '>') {
-                                       emit_log_char('<');
-                                       emit_log_char(default_message_loglevel
-                                               + '0');
-                                       emit_log_char('>');
-                                       printed_len += 3;
-                               }
                        }
-                       log_level_unknown = 0;
+
                        if (!*p)
                                break;
                }
+
                emit_log_char(*p);
                if (*p == '\n')
-                       log_level_unknown = 1;
+                       new_text_line = 1;
        }
 
        /*
@@ -1179,8 +1157,11 @@ void register_console(struct console *console)
                        console->index = 0;
                if (console->setup == NULL ||
                    console->setup(console, NULL) == 0) {
-                       console->flags |= CON_ENABLED | CON_CONSDEV;
-                       preferred_console = 0;
+                       console->flags |= CON_ENABLED;
+                       if (console->device) {
+                               console->flags |= CON_CONSDEV;
+                               preferred_console = 0;
+                       }
                }
        }