[PATCH 5/7] powerpc, arm64: Mark __switch_to() as __sched

[Peter Zijlstra]

Unlike most of the other architectures, PowerPC and ARM64 have
__switch_to() as a C function which remains on the stack. Their
respective __get_wchan() skips one stack frame unconditionally,
without testing is_sched_functions().

Mark them __sched such that we can forgo that special case.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 arch/arm64/kernel/process.c   |    4 ++--
 arch/powerpc/kernel/process.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -490,8 +490,8 @@ void update_sctlr_el1(u64 sctlr)
 /*
  * Thread switching.
  */
-__notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev,
-				struct task_struct *next)
+__notrace_funcgraph __sched
+struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next)
 {
 	struct task_struct *last;
 
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1201,8 +1201,8 @@ static inline void restore_sprs(struct t
 
 }
 
-struct task_struct *__switch_to(struct task_struct *prev,
-	struct task_struct *new)
+__sched struct task_struct *__switch_to(struct task_struct *prev,
+					struct task_struct *new)
 {
 	struct thread_struct *new_thread, *old_thread;
 	struct task_struct *last;