1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/posix-clock.h b/include/linux/posix-clock.h
index ef8619f48920..a500d3160fe8 100644
--- a/include/linux/posix-clock.h
+++ b/include/linux/posix-clock.h
@@ -95,10 +95,13 @@ struct posix_clock {
  * struct posix_clock_context - represents clock file operations context
  *
  * @clk:              Pointer to the clock
+ * @fp:               Pointer to the file used to open the clock
  * @private_clkdata:  Pointer to user data
  *
  * Drivers should use struct posix_clock_context during specific character
- * device file operation methods to access the posix clock.
+ * device file operation methods to access the posix clock. In particular,
+ * the file pointer can be used to verify correct access mode for ioctl()
+ * calls.
  *
  * Drivers can store a private data structure during the open operation
  * if they have specific information that is required in other file
@@ -106,6 +109,7 @@ struct posix_clock {
  */
 struct posix_clock_context {
 	struct posix_clock *clk;
+	struct file *fp;
 	void *private_clkdata;
 };