kernel: merge _IS_IN_ISR() with _is_in_isr()

They were the same, standardize on the lowercase one.

Change-Id: I8bca080e45f3e0970697d4451e468b9081f96f5f
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
diff --git a/arch/arc/include/nano_private.h b/arch/arc/include/nano_private.h
index f2244fd..c88f7b1 100644
--- a/arch/arc/include/nano_private.h
+++ b/arch/arc/include/nano_private.h
@@ -350,8 +350,6 @@
 	return ((act & 0xffff) != 0);
 }
 
-#define _IS_IN_ISR _is_in_isr
-
 /**
  *
  * @bried Indicates the interrupt number of the highest priority
diff --git a/arch/arm/include/nano_private.h b/arch/arm/include/nano_private.h
index edafbb7..a92dbad 100644
--- a/arch/arm/include/nano_private.h
+++ b/arch/arm/include/nano_private.h
@@ -322,7 +322,6 @@
 
 extern void nano_cpu_atomic_idle(unsigned int);
 
-#define _IS_IN_ISR() _IsInIsr()
 #define _is_in_isr() _IsInIsr()
 
 extern void _IntLibInit(void);
diff --git a/arch/nios2/include/nano_private.h b/arch/nios2/include/nano_private.h
index 39548af..beee556 100644
--- a/arch/nios2/include/nano_private.h
+++ b/arch/nios2/include/nano_private.h
@@ -263,7 +263,6 @@
 					  const NANO_ESF *esf);
 
 
-#define _IS_IN_ISR() (_nanokernel.nested != 0)
 #define _is_in_isr() (_nanokernel.nested != 0)
 
 #ifdef CONFIG_IRQ_OFFLOAD
diff --git a/arch/x86/include/nano_private.h b/arch/x86/include/nano_private.h
index 77c3807..68a3b5d 100644
--- a/arch/x86/include/nano_private.h
+++ b/arch/x86/include/nano_private.h
@@ -919,7 +919,6 @@
 }
 #endif
 
-#define _IS_IN_ISR() (_nanokernel.nested != 0)
 #define _is_in_isr() (_nanokernel.nested != 0)
 
 #endif /* _ASMLANGUAGE */
diff --git a/kernel/nanokernel/nano_context.c b/kernel/nanokernel/nano_context.c
index ca59fe8..d22a2b2 100644
--- a/kernel/nanokernel/nano_context.c
+++ b/kernel/nanokernel/nano_context.c
@@ -38,7 +38,7 @@
 
 nano_context_type_t sys_execution_context_type_get(void)
 {
-	if (_IS_IN_ISR())
+	if (_is_in_isr())
 		return NANO_CTX_ISR;
 
 	if ((_nanokernel.current->flags & TASK) == TASK)
diff --git a/kernel/unified/thread.c b/kernel/unified/thread.c
index e93e2a3..72fceec 100644
--- a/kernel/unified/thread.c
+++ b/kernel/unified/thread.c
@@ -62,7 +62,7 @@
  */
 int k_am_in_isr(void)
 {
-	return _IS_IN_ISR();
+	return _is_in_isr();
 }
 
 /*
diff --git a/tests/kernel/test_irq_offload/src/main.c b/tests/kernel/test_irq_offload/src/main.c
index 1b60c01..ad35206a 100644
--- a/tests/kernel/test_irq_offload/src/main.c
+++ b/tests/kernel/test_irq_offload/src/main.c
@@ -29,7 +29,7 @@
 	TC_PRINT("offload_function running\n");
 
 	/* Make sure we're in IRQ context */
-	if (!_IS_IN_ISR()) {
+	if (!_is_in_isr()) {
 		TC_PRINT("Not in IRQ context!\n");
 		return;
 	}