Hibernation: Introduce begin() and end() callbacks

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

diff --git a/include/linux/task_io_accounting_ops.h b/include/linux/task_io_accounting_ops.h
index df2a319106b2bd82e1518fdbf307d97bb96c8ed5..ff46c6fad79da300afaa621a41abcfb1bf4c787f 100644 (file)
--- a/include/linux/task_io_accounting_ops.h
+++ b/include/linux/task_io_accounting_ops.h
@@ -4,17 +4,37 @@
 #ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED
 #define __TASK_IO_ACCOUNTING_OPS_INCLUDED
 
+#include <linux/sched.h>
+
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 static inline void task_io_account_read(size_t bytes)
 {
        current->ioac.read_bytes += bytes;
 }
 
+/*
+ * We approximate number of blocks, because we account bytes only.
+ * A 'block' is 512 bytes
+ */
+static inline unsigned long task_io_get_inblock(const struct task_struct *p)
+{
+       return p->ioac.read_bytes >> 9;
+}
+
 static inline void task_io_account_write(size_t bytes)
 {
        current->ioac.write_bytes += bytes;
 }
 
+/*
+ * We approximate number of blocks, because we account bytes only.
+ * A 'block' is 512 bytes
+ */
+static inline unsigned long task_io_get_oublock(const struct task_struct *p)
+{
+       return p->ioac.write_bytes >> 9;
+}
+
 static inline void task_io_account_cancelled_write(size_t bytes)
 {
        current->ioac.cancelled_write_bytes += bytes;
@@ -31,10 +51,20 @@ static inline void task_io_account_read(size_t bytes)
 {
 }
 
+static inline unsigned long task_io_get_inblock(const struct task_struct *p)
+{
+       return 0;
+}
+
 static inline void task_io_account_write(size_t bytes)
 {
 }
 
+static inline unsigned long task_io_get_oublock(const struct task_struct *p)
+{
+       return 0;
+}
+
 static inline void task_io_account_cancelled_write(size_t bytes)
 {
 }