tile: various minor cleanups to hardwall subsystem (7d937719) · Commits · 戴 / test

arch/tile/kernel/hardwall.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -540,6 +540,14 @@ static struct hardwall_info hardwall_create(struct hardwall_type hwt,
		}
		}

		/*
		* Eliminate cpus that are not part of this Linux client.
		* Note that this allows for configurations that we might not want to
		* support, such as one client on every even cpu, another client on
		* every odd cpu.
		*/
		cpumask_and(&info->cpumask, &info->cpumask, cpu_online_mask);

		/* Confirm it doesn't overlap and add it to the list. */
		spin_lock_irqsave(&hwt->lock, flags);
		list_for_each_entry(iter, &hwt->list, list) {
		@@ -612,7 +620,7 @@ static int hardwall_activate(struct hardwall_info *info)

		/*
		* Deactivate a task's hardwall. Must hold lock for hardwall_type.
		* This method may be called from free_task(), so we don't want to
		* This method may be called from exit_thread(), so we don't want to
		* rely on too many fields of struct task_struct still being valid.
		* We assume the cpus_allowed, pid, and comm fields are still valid.
		*/

+9 −14

Original line number	Diff line number	Diff line
		@@ -74,19 +74,6 @@ void arch_release_thread_info(struct thread_info *info)
		{
		struct single_step_state *step_state = info->step_state;

		#ifdef CONFIG_HARDWALL
		/*
		* We free a thread_info from the context of the task that has
		* been scheduled next, so the original task is already dead.
		* Calling deactivate here just frees up the data structures.
		* If the task we're freeing held the last reference to a
		* hardwall fd, it would have been released prior to this point
		* anyway via exit_files(), and the hardwall_task.info pointers
		* would be NULL by now.
		*/
		hardwall_deactivate_all(info->task);
		#endif

		if (step_state) {

		/*
		@@ -564,7 +551,15 @@ void flush_thread(void)
		*/
		void exit_thread(void)
		{
		/* Nothing */
		#ifdef CONFIG_HARDWALL
		/*
		* Remove the task from the list of tasks that are associated
		* with any live hardwalls. (If the task that is exiting held
		* the last reference to a hardwall fd, it would already have
		* been released and deactivated at this point.)
		*/
		hardwall_deactivate_all(current);
		#endif
		}

		void show_regs(struct pt_regs *regs)