smp: Remove allocation mask from on_each_cpu_cond.*()

The allocation mask is no longer used by on_each_cpu_cond() and
on_each_cpu_cond_mask() and can be removed.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20200117090137.1205765-4-bigeasy@linutronix.de

arch/x86/mm/tlb.c

@@ -708,7 +708,7 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
 			       (void *)info, 1);
 	else
 		on_each_cpu_cond_mask(tlb_is_not_lazy, flush_tlb_func_remote,
-				(void *)info, 1, GFP_ATOMIC, cpumask);
+				(void *)info, 1, cpumask);
 }
 
 /*

fs/buffer.c

@@ -1433,7 +1433,7 @@ static bool has_bh_in_lru(int cpu, void *dummy)
 
 void invalidate_bh_lrus(void)
 {
-	on_each_cpu_cond(has_bh_in_lru, invalidate_bh_lru, NULL, 1, GFP_KERNEL);
+	on_each_cpu_cond(has_bh_in_lru, invalidate_bh_lru, NULL, 1);
 }
 EXPORT_SYMBOL_GPL(invalidate_bh_lrus);
 

include/linux/smp.h

@@ -51,11 +51,10 @@ void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
  * processor.
  */
 void on_each_cpu_cond(smp_cond_func_t cond_func, smp_call_func_t func,
-		      void *info, bool wait, gfp_t gfp_flags);
+		      void *info, bool wait);
 
 void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
-			   void *info, bool wait, gfp_t gfp_flags,
-			   const struct cpumask *mask);
+			   void *info, bool wait, const struct cpumask *mask);
 
 int smp_call_function_single_async(int cpu, call_single_data_t *csd);
 

kernel/smp.c

@@ -679,11 +679,6 @@ EXPORT_SYMBOL(on_each_cpu_mask);
  * @info:	An arbitrary pointer to pass to both functions.
  * @wait:	If true, wait (atomically) until function has
  *		completed on other CPUs.
- * @gfp_flags:	GFP flags to use when allocating the cpumask
- *		used internally by the function.
- *
- * The function might sleep if the GFP flags indicates a non
- * atomic allocation is allowed.
  *
  * Preemption is disabled to protect against CPUs going offline but not online.
  * CPUs going online during the call will not be seen or sent an IPI.
@@ -692,8 +687,7 @@ EXPORT_SYMBOL(on_each_cpu_mask);
  * from a hardware interrupt handler or from a bottom half handler.
  */
 void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
-			   void *info, bool wait, gfp_t gfp_flags,
-			   const struct cpumask *mask)
+			   void *info, bool wait, const struct cpumask *mask)
 {
 	int cpu = get_cpu();
 
@@ -710,10 +704,9 @@ void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
 EXPORT_SYMBOL(on_each_cpu_cond_mask);
 
 void on_each_cpu_cond(smp_cond_func_t cond_func, smp_call_func_t func,
-		      void *info, bool wait, gfp_t gfp_flags)
+		      void *info, bool wait)
 {
-	on_each_cpu_cond_mask(cond_func, func, info, wait, gfp_flags,
-				cpu_online_mask);
+	on_each_cpu_cond_mask(cond_func, func, info, wait, cpu_online_mask);
 }
 EXPORT_SYMBOL(on_each_cpu_cond);
 

kernel/up.c

@@ -69,8 +69,7 @@ EXPORT_SYMBOL(on_each_cpu_mask);
  * same condtions in UP and SMP.
  */
 void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
-			   void *info, bool wait, gfp_t gfp_flags,
-			   const struct cpumask *mask)
+			   void *info, bool wait, const struct cpumask *mask)
 {
 	unsigned long flags;
 
@@ -85,9 +84,9 @@ void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
 EXPORT_SYMBOL(on_each_cpu_cond_mask);
 
 void on_each_cpu_cond(smp_cond_func_t cond_func, smp_call_func_t func,
-		      void *info, bool wait, gfp_t gfp_flags)
+		      void *info, bool wait)
 {
-	on_each_cpu_cond_mask(cond_func, func, info, wait, gfp_flags, NULL);
+	on_each_cpu_cond_mask(cond_func, func, info, wait, NULL);
 }
 EXPORT_SYMBOL(on_each_cpu_cond);
 

mm/slub.c

@@ -2341,7 +2341,7 @@ static bool has_cpu_slab(int cpu, void *info)
 
 static void flush_all(struct kmem_cache *s)
 {
-	on_each_cpu_cond(has_cpu_slab, flush_cpu_slab, s, 1, GFP_ATOMIC);
+	on_each_cpu_cond(has_cpu_slab, flush_cpu_slab, s, 1);
 }
 
 /*