kernel/mem_leak_checker: Disable km4 log print when mem leak checking for rtl8730e

A thread of mem leak checker has the highest priority to check all heaps.
At this time, log thread can not run and print logs from km4 because of mem leak checker.
Then some error logs will be shown like below.
WARN: KM4 logbuf full, dropped log!
WARN: KM4 logbuf full, dropped log!

So we set reboot reason temporaily while checking mem leaks to avoid km4 log print.

Author: jeongarmy

os/arch/arm/src/amebasmart/amebasmart_reboot_reason.h

@@ -27,6 +27,7 @@ enum {
 	REBOOT_SYSTEM_BOD_RESET      = REBOOT_BOARD_SPECIFIC3, /* Brownout reset */
 	REBOOT_SYSTEM_TZWD_RESET     = REBOOT_BOARD_SPECIFIC4, /* TrustZone Watch dog */
 	REBOOT_SYSTEM_NP_LP_FAULT    = REBOOT_BOARD_SPECIFIC5, /* Reset due to fault in KM4/KM0 */
+	REBOOT_TEMP_BLOCK_KM4_LOG    = REBOOT_BOARD_SPECIFIC6, /* Temporal reboot reason setting to disable KM4 log print */
 };
 
 #endif /* __AMEBASMART_REBOOT_REASON_H__ */

os/kernel/debug/mem_leak_checker.c

@@ -32,6 +32,9 @@
 #include <binary_manager/binary_manager.h>
 #include <arch/chip/memory_region.h>
 #include <tinyara/binfmt/elf.h>
+#if defined(CONFIG_ARCH_BOARD_RTL8730E)
+#include <tinyara/reboot_reason.h>
+#endif
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -377,6 +380,11 @@ int run_mem_leak_checker(int checker_pid, char *bin_name)
 	int broken_cnt = 0;
 	struct mm_heap_s *heap = NULL;
 
+#if defined(CONFIG_ARCH_BOARD_RTL8730E)
+	/* Set reboot reason temporaily to avoid km4 log print */
+	WRITE_REBOOT_REASON(REBOOT_TEMP_BLOCK_KM4_LOG);
+#endif
+
 	if (strncmp(bin_name, "kernel", strlen("kernel") + 1) == 0) {
 		heap = kmm_get_baseheap();
 	} 
@@ -415,6 +423,12 @@ int run_mem_leak_checker(int checker_pid, char *bin_name)
 	print_info(heap, leak_cnt, broken_cnt);
 
 	hash_deinit();
+
+#if defined(CONFIG_ARCH_BOARD_RTL8730E)
+	/* Clear reboot reason to enable km4 log print again */
+	CLEAR_REBOOT_REASON();
+#endif
+
 	return OK;
 }