These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / watchdog / watchdog-kernel-api.txt

diff --git a/kernel/Documentation/watchdog/watchdog-kernel-api.txt b/kernel/Documentation/watchdog/watchdog-kernel-api.txt
index a0438f3..d8b0d33 100644 (file)
--- a/kernel/Documentation/watchdog/watchdog-kernel-api.txt
+++ b/kernel/Documentation/watchdog/watchdog-kernel-api.txt
@@ -36,6 +36,10 @@ The watchdog_unregister_device routine deregisters a registered watchdog timer
 device. The parameter of this routine is the pointer to the registered
 watchdog_device structure.
 
+The watchdog subsystem includes an registration deferral mechanism,
+which allows you to register an watchdog as early as you wish during
+the boot process.
+
 The watchdog device structure looks like this:
 
 struct watchdog_device {
@@ -52,6 +56,7 @@ struct watchdog_device {
        void *driver_data;
        struct mutex lock;
        unsigned long status;
+       struct list_head deferred;
 };
 
 It contains following fields:
@@ -80,6 +85,8 @@ It contains following fields:
   information about the status of the device (Like: is the watchdog timer
   running/active, is the nowayout bit set, is the device opened via
   the /dev/watchdog interface or not, ...).
+* deferred: entry in wtd_deferred_reg_list which is used to
+  register early initialized watchdogs.
 
 The list of watchdog operations is defined as: