13 #include "patch.h"
52  * We allow to patch also functions where RCU is not watching,
65  * The transition to the target patch state is complete.  Clean up the data
93 		 * from this patch on the ops->func_stack.  Otherwise, after  in klp_complete_transition()
157  * patch state.
238  * Determine whether it's safe to transition the task to the target patch state
285  * Try to safely switch a task to the target patch state.  If it's currently
307 	 * functions.  If all goes well, switch the task to the target patch  in klp_try_switch_task()
377  * Try to switch all remaining tasks to the target patch state by walking the
382  * If any tasks are still stuck in the initial patch state, schedule a retry.
388 	struct klp_patch *patch;  in klp_try_complete_transition()  local
394 	 * Try to switch the tasks to the target patch state by walking their  in klp_try_complete_transition()
400 	 * unless the patch includes changes to a very common function.  in klp_try_complete_transition()
444 	patch = klp_transition_patch;  in klp_try_complete_transition()
452 	if (!patch->enabled)  in klp_try_complete_transition()
453 		klp_free_patch_async(patch);  in klp_try_complete_transition()
454 	else if (patch->replace)  in klp_try_complete_transition()
455 		klp_free_replaced_patches_async(patch);  in klp_try_complete_transition()
459  * Start the transition to the specified target patch state so tasks can begin
474 	 * Mark all normal tasks as needing a patch state update.  They'll  in klp_start_transition()
485 	 * Mark all idle tasks as needing a patch state update.  They'll switch  in klp_start_transition()
499  * Initialize the global target patch state and all tasks to the initial patch
503 void klp_init_transition(struct klp_patch *patch, int state)  in klp_init_transition()  argument
513 	klp_transition_patch = patch;  in klp_init_transition()
516 	 * Set the global target patch state which tasks will switch to.  This  in klp_init_transition()
521 	pr_debug("'%s': initializing %s transition\n", patch->mod->name,  in klp_init_transition()
525 	 * Initialize all tasks to the initial patch state to prepare them for  in klp_init_transition()
566 	klp_for_each_object(patch, obj)  in klp_init_transition()
573  * reverse the direction of the target patch state.  This can be done to
575  * tasks which are stuck in the initial patch state.
643 	struct klp_patch *patch;  in klp_force_transition()  local
661 		klp_for_each_patch(patch) {  in klp_force_transition()
662 			if (patch != klp_transition_patch)  in klp_force_transition()
663 				patch->forced = true;  in klp_force_transition()