qcacld-3.0: Include change Ids in build tag

In order to assist in debugging efforts, include both CLD and CMN change
Ids in a build tag. Include the build tag as a part of the driver
version string.

Change-Id: I66d159a1594f71fdf33f3e4b4e6be4840d7e140a
CRs-Fixed: 2142704

Kbuild

@@ -47,7 +47,9 @@ ifeq ($(KERNEL_BUILD), 0)
 	# Need to explicitly configure for Android-based builds
 
 	ifneq ($(DEVELOPER_DISABLE_BUILD_TIMESTAMP),y)
-	CONFIG_BUILD_TIMESTAMP := y
+	ifneq ($(WLAN_DISABLE_BUILD_TAG),y)
+	CONFIG_BUILD_TAG := y
+	endif
 	endif
 
 	ifeq ($(CONFIG_ARCH_MDM9630), y)
@@ -2266,8 +2268,14 @@ CDEFINES += -DWLAN_HDD_ADAPTER_MAGIC=$(WLAN_HDD_ADAPTER_MAGIC)
 endif
 
 # inject some build related information
-ifeq ($(CONFIG_BUILD_TIMESTAMP), y)
-CDEFINES += -DBUILD_TIMESTAMP=\"$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')\"
+ifeq ($(CONFIG_BUILD_TAG), y)
+CLD_ID = $(shell cd "$(WLAN_ROOT)" && \
+	git log -1 | sed -nE 's/.*Change-Id: (I[0-f]{10}).*/\1/p')
+CMN_ID = $(shell cd "$(WLAN_COMMON_INC)" && \
+	git log -1 | sed -nE 's/.*Change-Id: (I[0-f]{10}).*/\1/p')
+TIMESTAMP = $(shell date -u +'%Y-%m-%dT%H:%M:%SZ')
+BUILD_TAG = "$(TIMESTAMP); cld:$(CLD_ID); cmn:$(CMN_ID);"
+CDEFINES += -DBUILD_TAG=\"$(BUILD_TAG)\"
 endif
 
 # Module information used by KBuild framework

core/hdd/src/wlan_hdd_main.c

@@ -339,12 +339,11 @@ void wlan_hdd_txrx_pause_cb(uint8_t vdev_id,
  * crash debugger can extract them from driver debug symbol and crashdump for
  * post processing
  */
+#ifdef BUILD_TAG
+uint8_t g_wlan_driver_version[] = QWLAN_VERSIONSTR "; " BUILD_TAG;
+#else
 uint8_t g_wlan_driver_version[] = QWLAN_VERSIONSTR;
-
-#ifndef BUILD_TIMESTAMP
-#define BUILD_TIMESTAMP ""
 #endif
-uint8_t g_wlan_driver_timestamp[] = BUILD_TIMESTAMP;
 
 /**
  * hdd_device_mode_to_string() - return string conversion of device mode
@@ -11249,10 +11248,9 @@ static int __hdd_module_init(void)
 {
 	int ret = 0;
 
-	pr_err("%s: Loading driver v%s (%s)%s\n",
+	pr_err("%s: Loading driver v%s (%s)\n",
 	       WLAN_MODULE_NAME,
-	       QWLAN_VERSIONSTR,
-	       g_wlan_driver_timestamp,
+	       g_wlan_driver_version,
 	       TIMER_MANAGER_STR MEMORY_DEBUG_STR);
 
 	ret = wlan_hdd_state_ctrl_param_create();