Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[pandora-kernel.git] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index f7d427e..c770e1a 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -31,6 +31,7 @@
 #include <linux/security.h>
 #include <linux/bootmem.h>
 #include <linux/syscalls.h>
+#include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
 
@@ -52,8 +53,6 @@ int console_printk[4] = {
        DEFAULT_CONSOLE_LOGLEVEL,       /* default_console_loglevel */
 };
 
-EXPORT_UNUSED_SYMBOL(console_printk);  /*  June 2006  */
-
 /*
  * Low lever drivers may need that to know if they can schedule in
  * their unblank() callback or not. So let's export it.
@@ -334,13 +333,25 @@ static void __call_console_drivers(unsigned long start, unsigned long end)
        }
 }
 
+static int __read_mostly ignore_loglevel;
+
+static int __init ignore_loglevel_setup(char *str)
+{
+       ignore_loglevel = 1;
+       printk(KERN_INFO "debug: ignoring loglevel setting.\n");
+
+       return 1;
+}
+
+__setup("ignore_loglevel", ignore_loglevel_setup);
+
 /*
  * Write out chars from start to end - 1 inclusive
  */
 static void _call_console_drivers(unsigned long start,
                                unsigned long end, int msg_log_level)
 {
-       if (msg_log_level < console_loglevel &&
+       if ((msg_log_level < console_loglevel || ignore_loglevel) &&
                        console_drivers && start != end) {
                if ((start & LOG_BUF_MASK) > (end & LOG_BUF_MASK)) {
                        /* wrapped write */
@@ -630,12 +641,7 @@ EXPORT_SYMBOL(vprintk);
 
 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;
+       return -ENOSYS;
 }
 
 static void call_console_drivers(unsigned long start, unsigned long end)
@@ -776,7 +782,6 @@ int is_console_locked(void)
 {
        return console_locked;
 }
-EXPORT_UNUSED_SYMBOL(is_console_locked);  /*  June 2006  */
 
 /**
  * release_console_sem - unlock the console system
@@ -1101,3 +1106,23 @@ int printk_ratelimit(void)
                                printk_ratelimit_burst);
 }
 EXPORT_SYMBOL(printk_ratelimit);
+
+/**
+ * printk_timed_ratelimit - caller-controlled printk ratelimiting
+ * @caller_jiffies: pointer to caller's state
+ * @interval_msecs: minimum interval between prints
+ *
+ * printk_timed_ratelimit() returns true if more than @interval_msecs
+ * milliseconds have elapsed since the last time printk_timed_ratelimit()
+ * returned true.
+ */
+bool printk_timed_ratelimit(unsigned long *caller_jiffies,
+                       unsigned int interval_msecs)
+{
+       if (*caller_jiffies == 0 || time_after(jiffies, *caller_jiffies)) {
+               *caller_jiffies = jiffies + msecs_to_jiffies(interval_msecs);
+               return true;
+       }
+       return false;
+}
+EXPORT_SYMBOL(printk_timed_ratelimit);