sched/core: Drop the unused try_get_task_struct() helper function (f11cc076) · Commits · 戴 / test

This function was introduced by: ("sched/api: Introduce task_rcu_dereference() and try_get_task_struct()") ... to allow easier usage of task_rcu_dereference(), however no users were ever added. Drop the helper. Signed-off-by:

Davidlohr Bueso <dbueso@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dave@stgolabs.net Link: http://lkml.kernel.org/r/20170615023730.22827-1-dave@stgolabs.net Signed-off-by:

Ingo Molnar <mingo@kernel.org>

include/linux/sched/task.h

+0 −2

Original line number	Diff line number	Diff line
		@@ -95,8 +95,6 @@ static inline void put_task_struct(struct task_struct *t)
		}

		struct task_struct task_rcu_dereference(struct task_struct *ptask);
		struct task_struct try_get_task_struct(struct task_struct *ptask);


		#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
		extern int arch_task_struct_size __read_mostly;

kernel/exit.c

+0 −13

Original line number	Diff line number	Diff line
		@@ -318,19 +318,6 @@ void rcuwait_wake_up(struct rcuwait *w)
		rcu_read_unlock();
		}

		struct task_struct try_get_task_struct(struct task_struct *ptask)
		{
		struct task_struct *task;

		rcu_read_lock();
		task = task_rcu_dereference(ptask);
		if (task)
		get_task_struct(task);
		rcu_read_unlock();

		return task;
		}

		/*
		* Determine if a process group is "orphaned", according to the POSIX
		* definition in 2.2.2.52. Orphaned process groups are not to be affected

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