--- zzzz-none-000/linux-4.1.38/arch/arm/include/asm/atomic.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/arch/arm/include/asm/atomic.h	2020-11-25 10:06:48.000000000 +0000
@@ -131,6 +131,64 @@
 	return oldval;
 }
 
+static inline int atomic_inc_with_max_return(atomic_t *v, unsigned int max_value)
+{
+	int oldval, newval;
+	unsigned long tmp;
+        max_value -= 1;
+
+	smp_mb();
+
+	__asm__ __volatile__ ("@ atomic_inc_with_max_return\n"
+"1:	ldrex	%0, [%4]\n"
+"	teq	%0, %5\n"
+"	beq	2f\n"
+"	add	%1, %0, #1\n"
+"	strex	%2, %1, [%4]\n"
+"	teq	%2, #0\n"
+"	bne	1b\n"
+"2:"
+	: "=&r" (oldval), "=&r" (newval), "=&r" (tmp), "+Qo" (v->counter)
+	: "r" (&v->counter), "r" (max_value)
+	: "cc");
+
+	if (likely((unsigned int)oldval != max_value))
+	{
+	   smp_mb();
+
+	   return newval;
+	}
+
+	return -1;
+}
+
+static inline int atomic_inc_with_wrap_return(atomic_t *v, unsigned int max_value)
+{
+	int oldval, newval;
+	unsigned long tmp;
+        max_value -= 1;
+
+	smp_mb();
+
+	__asm__ __volatile__ ("@ atomic_inc_with_wrap_return\n"
+"1:	ldrex	%0, [%4]\n"
+"	teq	%0, %5\n"
+"	moveq	%1, #0\n"
+"	addne	%1, %0, #1\n"
+"	strex	%2, %1, [%4]\n"
+"	teq	%2, #0\n"
+"	bne	1b\n"
+"2:"
+	: "=&r" (oldval), "=&r" (newval), "=&r" (tmp), "+Qo" (v->counter)
+	: "r" (&v->counter), "r" (max_value)
+	: "cc");
+
+	smp_mb();
+
+        return newval;
+
+}
+
 #else /* ARM_ARCH_6 */
 
 #ifdef CONFIG_SMP