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

[linux-2.6-omap-h63xx.git] / include / linux / proportions.h

diff --git a/include/linux/proportions.h b/include/linux/proportions.h
index 2c3b3cad92bec050b18605cffe39784f774f09d0..5afc1b23346d1f04536ea9339c1790b1cceeef3a 100644 (file)
--- a/include/linux/proportions.h
+++ b/include/linux/proportions.h
@@ -77,6 +77,19 @@ void prop_inc_percpu(struct prop_descriptor *pd, struct prop_local_percpu *pl)
        local_irq_restore(flags);
 }
 
+/*
+ * Limit the time part in order to ensure there are some bits left for the
+ * cycle counter and fraction multiply.
+ */
+#define PROP_MAX_SHIFT (3*BITS_PER_LONG/4)
+
+#define PROP_FRAC_SHIFT                (BITS_PER_LONG - PROP_MAX_SHIFT - 1)
+#define PROP_FRAC_BASE         (1UL << PROP_FRAC_SHIFT)
+
+void __prop_inc_percpu_max(struct prop_descriptor *pd,
+                          struct prop_local_percpu *pl, long frac);
+
+
 /*
  * ----- SINGLE ------
  */