Merge branch 'master'

[sfrench/cifs-2.6.git] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index e9be027bc9300d03322a7ecf5681bdb2dec69f4b..891f7a7140371d08fa28ff6ea851f15d4475ed94 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -11,7 +11,7 @@
  * Ted Ts'o, 2/11/93.
  * Modified for sysctl support, 1/8/97, Chris Horn.
  * Fixed SMP synchronization, 08/08/99, Manfred Spraul
- *     manfreds@colorfullife.com
+ *     manfred@colorfullife.com
  * Rewrote bits to get rid of console_lock
  *     01Mar01 Andrew Morton <andrewm@uow.edu.au>
  */
@@ -122,44 +122,6 @@ 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
- */
-static int __init console_setup(char *str)
-{
-       char name[sizeof(console_cmdline[0].name)];
-       char *s, *options;
-       int idx;
-
-       /*
-        *      Decode str into name, index, options.
-        */
-       if (str[0] >= '0' && str[0] <= '9') {
-               strcpy(name, "ttyS");
-               strncpy(name + 4, str, sizeof(name) - 5);
-       } else
-               strncpy(name, str, sizeof(name) - 1);
-       name[sizeof(name) - 1] = 0;
-       if ((options = strchr(str, ',')) != NULL)
-               *(options++) = 0;
-#ifdef __sparc__
-       if (!strcmp(str, "ttya"))
-               strcpy(name, "ttyS0");
-       if (!strcmp(str, "ttyb"))
-               strcpy(name, "ttyS1");
-#endif
-       for (s = name; *s; s++)
-               if ((*s >= '0' && *s <= '9') || *s == ',')
-                       break;
-       idx = simple_strtoul(s, NULL, 10);
-       *s = 0;
-
-       add_preferred_console(name, idx, options);
-       return 1;
-}
-
-__setup("console=", console_setup);
-
 static int __init log_buf_len_setup(char *str)
 {
        unsigned long size = memparse(str, &str);
@@ -491,7 +453,10 @@ __attribute__((weak)) unsigned long long printk_clock(void)
        return sched_clock();
 }
 
-/*
+/**
+ * printk - print a kernel message
+ * @fmt: format string
+ *
  * This is printk.  It can be called from any context.  We want it to work.
  *
  * We try to grab the console_sem.  If we succeed, it's easy - we log the output and
@@ -503,6 +468,9 @@ __attribute__((weak)) unsigned long long printk_clock(void)
  * One effect of this deferred printing is that code which calls printk() and
  * then changes console_loglevel may break. This is because console_loglevel
  * is inspected when the actual printing occurs.
+ *
+ * See also:
+ * printf(3)
  */
 
 asmlinkage int printk(const char *fmt, ...)
@@ -563,7 +531,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
                                   p[1] <= '7' && p[2] == '>') {
                                        loglev_char = p[1];
                                        p += 3;
-                                       printed_len += 3;
+                                       printed_len -= 3;
                                } else {
                                        loglev_char = default_message_loglevel
                                                + '0';
@@ -578,7 +546,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 
                                for (tp = tbuf; tp < tbuf + tlen; tp++)
                                        emit_log_char(*tp);
-                               printed_len += tlen - 3;
+                               printed_len += tlen;
                        } else {
                                if (p[0] != '<' || p[1] < '0' ||
                                   p[1] > '7' || p[2] != '>') {
@@ -586,8 +554,8 @@ asmlinkage int vprintk(const char *fmt, va_list args)
                                        emit_log_char(default_message_loglevel
                                                + '0');
                                        emit_log_char('>');
+                                       printed_len += 3;
                                }
-                               printed_len += 3;
                        }
                        log_level_unknown = 0;
                        if (!*p)
@@ -653,8 +621,49 @@ static void call_console_drivers(unsigned long start, unsigned long end)
 
 #endif
 
+/*
+ * Set up a list of consoles.  Called from init/main.c
+ */
+static int __init console_setup(char *str)
+{
+       char name[sizeof(console_cmdline[0].name)];
+       char *s, *options;
+       int idx;
+
+       /*
+        * Decode str into name, index, options.
+        */
+       if (str[0] >= '0' && str[0] <= '9') {
+               strcpy(name, "ttyS");
+               strncpy(name + 4, str, sizeof(name) - 5);
+       } else {
+               strncpy(name, str, sizeof(name) - 1);
+       }
+       name[sizeof(name) - 1] = 0;
+       if ((options = strchr(str, ',')) != NULL)
+               *(options++) = 0;
+#ifdef __sparc__
+       if (!strcmp(str, "ttya"))
+               strcpy(name, "ttyS0");
+       if (!strcmp(str, "ttyb"))
+               strcpy(name, "ttyS1");
+#endif
+       for (s = name; *s; s++)
+               if ((*s >= '0' && *s <= '9') || *s == ',')
+                       break;
+       idx = simple_strtoul(s, NULL, 10);
+       *s = 0;
+
+       add_preferred_console(name, idx, options);
+       return 1;
+}
+__setup("console=", console_setup);
+
 /**
  * add_preferred_console - add a device to the list of preferred consoles.
+ * @name: device name
+ * @idx: device index
+ * @options: options for this console
  *
  * The last preferred console added will be used for kernel messages
  * and stdin/out/err for init.  Normally this is used by console_setup
@@ -764,7 +773,8 @@ void release_console_sem(void)
 }
 EXPORT_SYMBOL(release_console_sem);
 
-/** console_conditional_schedule - yield the CPU if required
+/**
+ * console_conditional_schedule - yield the CPU if required
  *
  * If the console code is currently allowed to sleep, and
  * if this CPU should yield the CPU to another task, do
@@ -946,7 +956,7 @@ int unregister_console(struct console *console)
        if (console_drivers == console) {
                console_drivers=console->next;
                res = 0;
-       } else {
+       } else if (console_drivers) {
                for (a=console_drivers->next, b=console_drivers ;
                     a; b=a, a=b->next) {
                        if (a == console) {
@@ -976,6 +986,8 @@ EXPORT_SYMBOL(unregister_console);
 
 /**
  * tty_write_message - write a message to a certain tty, not just the console.
+ * @tty: the destination tty_struct
+ * @msg: the message to write
  *
  * This is used for messages that need to be redirected to a specific tty.
  * We don't put it into the syslog queue right now maybe in the future if
@@ -987,6 +999,7 @@ void tty_write_message(struct tty_struct *tty, char *msg)
                tty->driver->write(tty, msg, strlen(msg));
        return;
 }
+EXPORT_SYMBOL_GPL(tty_write_message);
 
 /*
  * printk rate limiting, lifted from the networking subsystem.