[PATCH] slab debug and ARCH_SLAB_MINALIGN don't get along

[linux-2.6-omap-h63xx.git] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 771f5e861bcd38af1d5d7f91666b2413b1d4008b..66426552fbfef24e49442ed08f8d595930feca32 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>
 
@@ -820,15 +821,8 @@ void release_console_sem(void)
        console_locked = 0;
        up(&console_sem);
        spin_unlock_irqrestore(&logbuf_lock, flags);
-       if (wake_klogd && !oops_in_progress && waitqueue_active(&log_wait)) {
-               /*
-                * If we printk from within the lock dependency code,
-                * from within the scheduler code, then do not lock
-                * up due to self-recursion:
-                */
-               if (!lockdep_internal())
-                       wake_up_interruptible(&log_wait);
-       }
+       if (wake_klogd && !oops_in_progress && waitqueue_active(&log_wait))
+               wake_up_interruptible(&log_wait);
 }
 EXPORT_SYMBOL(release_console_sem);
 
@@ -1108,3 +1102,23 @@ 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);