On Thu, 2018-02-01 at 15:46 +1100, Michael Ellerman wrote:

Cyril Bur [off-list ref] writes:

quoted

tm_reclaim_thread() doesn't use the parameter anymore, both callers have
to bother getting it as they have no need for a struct thread_info
either.

In future please tell me why the parameter is unused and when it became
unused.

Thanks, will do!

In this case it was previously used but the last usage was removed in:

dc3106690b20 ("powerpc: tm: Always use fp_state and vr_state to store live registers")

cheers

quoted

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index bfdd783e3916..a47498da6562 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c

@@ -853,8 +853,7 @@ static inline bool tm_enabled(struct task_struct *tsk)
 	return tsk && tsk->thread.regs && (tsk->thread.regs->msr & MSR_TM);
 }
 
-static void tm_reclaim_thread(struct thread_struct *thr,
-			      struct thread_info *ti, uint8_t cause)
+static void tm_reclaim_thread(struct thread_struct *thr, uint8_t cause)
 {
 	/*
 	 * Use the current MSR TM suspended bit to track if we have

@@ -901,7 +900,7 @@ static void tm_reclaim_thread(struct thread_struct *thr,
 void tm_reclaim_current(uint8_t cause)
 {
 	tm_enable();
-	tm_reclaim_thread(&current->thread, current_thread_info(), cause);
+	tm_reclaim_thread(&current->thread, cause);
 }
 
 static inline void tm_reclaim_task(struct task_struct *tsk)

@@ -932,7 +931,7 @@ static inline void tm_reclaim_task(struct task_struct *tsk)
 		 thr->regs->ccr, thr->regs->msr,
 		 thr->regs->trap);
 
-	tm_reclaim_thread(thr, task_thread_info(tsk), TM_CAUSE_RESCHED);
+	tm_reclaim_thread(thr, TM_CAUSE_RESCHED);
 
 	TM_DEBUG("--- tm_reclaim on pid %d complete\n",
 		 tsk->pid);

-- 
2.16.1