PM: hibernate: Rename function parameter from snapshot_test to exclusive

Several functions reply on snapshot_test to decide whether to
open the resume device exclusively. However there is no strict
connection between the snapshot_test and the open mode. Rename
the 'snapshot_test' input parameter to 'exclusive' to better reflect
the use case.

No functional change is expected.
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/power/power.h

@@ -168,11 +168,11 @@ extern int swsusp_swap_in_use(void);
 #define SF_HW_SIG		8
 
 /* kernel/power/hibernate.c */
-int swsusp_check(bool snapshot_test);
+int swsusp_check(bool exclusive);
 extern void swsusp_free(void);
 extern int swsusp_read(unsigned int *flags_p);
 extern int swsusp_write(unsigned int flags);
-void swsusp_close(bool snapshot_test);
+void swsusp_close(bool exclusive);
 #ifdef CONFIG_SUSPEND
 extern int swsusp_unmark(void);
 #endif

kernel/power/swap.c

@@ -1514,11 +1514,12 @@ static void *swsusp_holder;
 
 /**
  * swsusp_check - Check for swsusp signature in the resume device
+ * @exclusive: Open the resume device exclusively.
  */
 
-int swsusp_check(bool snapshot_test)
+int swsusp_check(bool exclusive)
 {
-	void *holder = snapshot_test ? &swsusp_holder : NULL;
+	void *holder = exclusive ? &swsusp_holder : NULL;
 	int error;
 
 	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, BLK_OPEN_READ,
@@ -1564,16 +1565,17 @@ int swsusp_check(bool snapshot_test)
 
 /**
  * swsusp_close - close swap device.
+ * @exclusive: Close the resume device which is exclusively opened.
  */
 
-void swsusp_close(bool snapshot_test)
+void swsusp_close(bool exclusive)
 {
 	if (IS_ERR(hib_resume_bdev)) {
 		pr_debug("Image device not initialised\n");
 		return;
 	}
 
-	blkdev_put(hib_resume_bdev, snapshot_test ? &swsusp_holder : NULL);
+	blkdev_put(hib_resume_bdev, exclusive ? &swsusp_holder : NULL);
 }
 
 /**