powerpc/64s: Kill the unused argument of exit_lazy_flush_tlb

In previous patch we removed the only caller of exit_lazy_flush_tlb()
which was passing always_flush = false in it's second argument.

With that gone, all the callers of exit_lazy_flush_tlb() are local to
radix_pgtable.c and there is no need of an additional argument.

This patch does the required cleanup. There should not be any
functionality change in this patch.

Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/6f96ea53588034312ae84f74b1e2fa9c4ce7cfd5.1773078178.git.ritesh.list@gmail.com

Author: riteshharjani

arch/powerpc/mm/book3s64/internal.h

@@ -31,6 +31,4 @@ static inline bool slb_preload_disabled(void)
 
 void hpt_do_stress(unsigned long ea, unsigned long hpte_group);
 
-void exit_lazy_flush_tlb(struct mm_struct *mm, bool always_flush);
-
 #endif /* ARCH_POWERPC_MM_BOOK3S64_INTERNAL_H */

arch/powerpc/mm/book3s64/pgtable.c

@@ -23,8 +23,6 @@
 #include <mm/mmu_decl.h>
 #include <trace/events/thp.h>
 
-#include "internal.h"
-
 struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
 EXPORT_SYMBOL_GPL(mmu_psize_defs);
 

arch/powerpc/mm/book3s64/radix_tlb.c

@@ -19,8 +19,6 @@
 #include <asm/cputhreads.h>
 #include <asm/plpar_wrappers.h>
 
-#include "internal.h"
-
 /*
  * tlbiel instruction for radix, set invalidation
  * i.e., r=1 and is=01 or is=10 or is=11
@@ -660,7 +658,7 @@ static bool mm_needs_flush_escalation(struct mm_struct *mm)
  * If always_flush is true, then flush even if this CPU can't be removed
  * from mm_cpumask.
  */
-void exit_lazy_flush_tlb(struct mm_struct *mm, bool always_flush)
+static void exit_lazy_flush_tlb(struct mm_struct *mm)
 {
 	unsigned long pid = mm->context.id;
 	int cpu = smp_processor_id();
@@ -703,19 +701,17 @@ void exit_lazy_flush_tlb(struct mm_struct *mm, bool always_flush)
 	if (cpumask_test_cpu(cpu, mm_cpumask(mm))) {
 		dec_mm_active_cpus(mm);
 		cpumask_clear_cpu(cpu, mm_cpumask(mm));
-		always_flush = true;
 	}
 
 out:
-	if (always_flush)
-		_tlbiel_pid(pid, RIC_FLUSH_ALL);
+	_tlbiel_pid(pid, RIC_FLUSH_ALL);
 }
 
 #ifdef CONFIG_SMP
 static void do_exit_flush_lazy_tlb(void *arg)
 {
 	struct mm_struct *mm = arg;
-	exit_lazy_flush_tlb(mm, true);
+	exit_lazy_flush_tlb(mm);
 }
 
 static void exit_flush_lazy_tlbs(struct mm_struct *mm)
@@ -777,7 +773,7 @@ static enum tlb_flush_type flush_type_needed(struct mm_struct *mm, bool fullmm)
 			 * to trim.
 			 */
 			if (tick_and_test_trim_clock()) {
-				exit_lazy_flush_tlb(mm, true);
+				exit_lazy_flush_tlb(mm);
 				return FLUSH_TYPE_NONE;
 			}
 		}
@@ -823,7 +819,7 @@ static enum tlb_flush_type flush_type_needed(struct mm_struct *mm, bool fullmm)
 		if (current->mm == mm)
 			return FLUSH_TYPE_LOCAL;
 		if (cpumask_test_cpu(cpu, mm_cpumask(mm)))
-			exit_lazy_flush_tlb(mm, true);
+			exit_lazy_flush_tlb(mm);
 		return FLUSH_TYPE_NONE;
 	}