Merge tag 'powerpc-6.6-5' of git://git.kernel.org/pub/scm/linux/kerne…

…l/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Fix stale propagated yield_cpu in qspinlocks leading to lockups

 - Fix broken hugepages on some configs due to ARCH_FORCE_MAX_ORDER

 - Fix a spurious warning when copros are in use at exit time

Thanks to Nicholas Piggin, Christophe Leroy, Nysal Jan K.A Sachin Sant,
and Shrikanth Hegde.

* tag 'powerpc-6.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/qspinlock: Fix stale propagated yield_cpu
  powerpc/64s/radix: Don't warn on copros in radix__tlb_flush()
  powerpc/mm: Allow ARCH_FORCE_MAX_ORDER up to 12

arch/powerpc/Kconfig

@@ -910,7 +910,7 @@ config ARCH_FORCE_MAX_ORDER
 	default "6" if PPC32 && PPC_64K_PAGES
 	range 4 10 if PPC32 && PPC_256K_PAGES
 	default "4" if PPC32 && PPC_256K_PAGES
-	range 10 10
+	range 10 12
 	default "10"
 	help
 	  The kernel page allocator limits the size of maximal physically

arch/powerpc/lib/qspinlock.c

@@ -406,6 +406,9 @@ static __always_inline bool yield_to_prev(struct qspinlock *lock, struct qnode *
 	if ((yield_count & 1) == 0)
 		goto yield_prev; /* owner vcpu is running */
 
+	if (get_owner_cpu(READ_ONCE(lock->val)) != yield_cpu)
+		goto yield_prev; /* re-sample lock owner */
+
 	spin_end();
 
 	preempted = true;

arch/powerpc/mm/book3s64/radix_tlb.c

@@ -1212,14 +1212,7 @@ void radix__tlb_flush(struct mmu_gather *tlb)
 
 			smp_mb(); /* see radix__flush_tlb_mm */
 			exit_flush_lazy_tlbs(mm);
-			_tlbiel_pid(mm->context.id, RIC_FLUSH_ALL);
-
-			/*
-			 * It should not be possible to have coprocessors still
-			 * attached here.
-			 */
-			if (WARN_ON_ONCE(atomic_read(&mm->context.copros) > 0))
-				__flush_all_mm(mm, true);
+			__flush_all_mm(mm, true);
 
 			preempt_enable();
 		} else {