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authorJean-Baptiste Theou <jtheou@adeneo-embedded.us>2015-06-09 09:55:02 -0700
committerWim Van Sebroeck <wim@iguana.be>2015-06-29 11:51:06 +0200
commitef90174f821041313d42d99c1c8b35a3af64a910 (patch)
tree0265d89b6ee866b7e20a8925fae03e290e078e00 /include
parentb9be9660ba2d23259e4a430a44167ef441dc5fe6 (diff)
watchdog: watchdog_core: Add watchdog registration deferral mechanism
Currently, watchdog subsystem require the misc subsystem to register a watchdog. This may not be the case in case of an early registration of a watchdog, which can be required when the watchdog cannot be disabled. This patch introduces a deferral mechanism to remove this requirement. Signed-off-by: Jean-Baptiste Theou <jtheou@adeneo-embedded.us> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'include')
-rw-r--r--include/linux/watchdog.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h
index a746bf5216f8..f47feada5b42 100644
--- a/include/linux/watchdog.h
+++ b/include/linux/watchdog.h
@@ -65,6 +65,8 @@ struct watchdog_ops {
* @driver-data:Pointer to the drivers private data.
* @lock: Lock for watchdog core internal use only.
* @status: Field that contains the devices internal status bits.
+ * @deferred: entry in wtd_deferred_reg_list which is used to
+ * register early initialized watchdogs.
*
* The watchdog_device structure contains all information about a
* watchdog timer device.
@@ -95,6 +97,7 @@ struct watchdog_device {
#define WDOG_ALLOW_RELEASE 2 /* Did we receive the magic char ? */
#define WDOG_NO_WAY_OUT 3 /* Is 'nowayout' feature set ? */
#define WDOG_UNREGISTERED 4 /* Has the device been unregistered */
+ struct list_head deferred;
};
#define WATCHDOG_NOWAYOUT IS_BUILTIN(CONFIG_WATCHDOG_NOWAYOUT)