mmc: implement SDIO IO_RW_DIRECT operation

[linux-2.6] / include / linux / clocksource.h

diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 830a250ecf947688e5fb3b5589e20f908088f828..16ea3374dddf7a543501fca71718c5d72b885e07 100644 (file)
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -12,6 +12,7 @@
 #include <linux/timex.h>
 #include <linux/time.h>
 #include <linux/list.h>
+#include <linux/cache.h>
 #include <linux/timer.h>
 #include <asm/div64.h>
 #include <asm/io.h>
@@ -47,10 +48,15 @@ struct clocksource;
  * @mult:              cycle to nanosecond multiplier
  * @shift:             cycle to nanosecond divisor (power of two)
  * @flags:             flags describing special properties
+ * @vread:             vsyscall based read
+ * @resume:            resume function for the clocksource, if necessary
  * @cycle_interval:    Used internally by timekeeping core, please ignore.
  * @xtime_interval:    Used internally by timekeeping core, please ignore.
  */
 struct clocksource {
+       /*
+        * First part of structure is read mostly
+        */
        char *name;
        struct list_head list;
        int rating;
@@ -59,10 +65,25 @@ struct clocksource {
        u32 mult;
        u32 shift;
        unsigned long flags;
+       cycle_t (*vread)(void);
+       void (*resume)(void);
+#ifdef CONFIG_IA64
+       void *fsys_mmio;        /* used by fsyscall asm code */
+#define CLKSRC_FSYS_MMIO_SET(mmio, addr)      ((mmio) = (addr))
+#else
+#define CLKSRC_FSYS_MMIO_SET(mmio, addr)      do { } while (0)
+#endif
 
        /* timekeeping specific data, ignore */
-       cycle_t cycle_last, cycle_interval;
-       u64 xtime_nsec, xtime_interval;
+       cycle_t cycle_interval;
+       u64     xtime_interval;
+       /*
+        * Second part is written at each timer interrupt
+        * Keep it in a different cache line to dirty no
+        * more than one cache line.
+        */
+       cycle_t cycle_last ____cacheline_aligned_in_smp;
+       u64 xtime_nsec;
        s64 error;
 
 #ifdef CONFIG_CLOCKSOURCE_WATCHDOG
@@ -196,5 +217,14 @@ static inline void clocksource_calculate_interval(struct clocksource *c,
 extern int clocksource_register(struct clocksource*);
 extern struct clocksource* clocksource_get_next(void);
 extern void clocksource_change_rating(struct clocksource *cs, int rating);
+extern void clocksource_resume(void);
+
+#ifdef CONFIG_GENERIC_TIME_VSYSCALL
+extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
+#else
+static inline void update_vsyscall(struct timespec *ts, struct clocksource *c)
+{
+}
+#endif
 
 #endif /* _LINUX_CLOCKSOURCE_H */