Re: [PATCH v5 2/7] powerpc: Use TIDR CPU feature to control TIDR allocation

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Le 11/05/2018 à 08:12, Alastair D'Silva a écrit :
From: Alastair D'Silva <alastair@xxxxxxxxxxx>

Switch the use of TIDR on it's CPU feature, rather than assuming it
is available based on architecture.

Signed-off-by: Alastair D'Silva <alastair@xxxxxxxxxxx>
---

Reviewed-by: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx>


  arch/powerpc/kernel/process.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 1237f13fed51..3b00da47699b 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1154,7 +1154,7 @@ static inline void restore_sprs(struct thread_struct *old_thread,
  			mtspr(SPRN_TAR, new_thread->tar);
  	}

-	if (cpu_has_feature(CPU_FTR_ARCH_300) &&
+	if (cpu_has_feature(CPU_FTR_P9_TIDR) &&
  	    old_thread->tidr != new_thread->tidr)
  		mtspr(SPRN_TIDR, new_thread->tidr);
  #endif
@@ -1570,7 +1570,7 @@ void clear_thread_tidr(struct task_struct *t)
  	if (!t->thread.tidr)
  		return;

-	if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
+	if (!cpu_has_feature(CPU_FTR_P9_TIDR)) {
  		WARN_ON_ONCE(1);
  		return;
  	}
@@ -1593,7 +1593,7 @@ int set_thread_tidr(struct task_struct *t)
  {
  	int rc;

-	if (!cpu_has_feature(CPU_FTR_ARCH_300))
+	if (!cpu_has_feature(CPU_FTR_P9_TIDR))
  		return -EINVAL;

  	if (t != current)


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