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Commit 3449f191 authored by Alastair D'Silva's avatar Alastair D'Silva Committed by Michael Ellerman
Browse files

powerpc: Use TIDR CPU feature to control TIDR allocation 



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

Signed-off-by: default avatarAlastair D'Silva <alastair@d-silva.org>
Reviewed-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 81984428

arch/powerpc/kernel/process.c

+3 −3
Original line number Diff line number Diff line
@@ -1151,7 +1151,7 @@ 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
@@ -1553,7 +1553,7 @@ 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;

	}
@@ -1576,7 +1576,7 @@ 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)