diff --git a/include/osdep_service.h b/include/osdep_service.h
index 585870a..6fc4ae0 100644
--- a/include/osdep_service.h
+++ b/include/osdep_service.h
@@ -106,10 +106,6 @@
 
 extern int RTW_STATUS_CODE(int error_code);
 
-#ifndef RTK_DMP_PLATFORM
-	#define CONFIG_USE_VMALLOC
-#endif
-
 /* flags used for rtw_mstat_update() */
 enum mstat_f {
 	/* type: 0x00ff */
@@ -143,8 +139,6 @@ typedef enum mstat_status {
 void rtw_mstat_update(const enum mstat_f flags, const MSTAT_STATUS status, u32 sz);
 void rtw_mstat_dump(void *sel);
 bool match_mstat_sniff_rules(const enum mstat_f flags, const size_t size);
-void *dbg_rtw_vmalloc(u32 sz, const enum mstat_f flags, const char *func, const int line);
-void *dbg_rtw_zvmalloc(u32 sz, const enum mstat_f flags, const char *func, const int line);
 void dbg_rtw_vmfree(void *pbuf, const enum mstat_f flags, u32 sz, const char *func, const int line);
 void *dbg_rtw_malloc(u32 sz, const enum mstat_f flags, const char *func, const int line);
 void *dbg_rtw_zmalloc(u32 sz, const enum mstat_f flags, const char *func, const int line);
@@ -167,15 +161,6 @@ void *dbg_rtw_usb_buffer_alloc(struct usb_device *dev, size_t size, dma_addr_t *
 void dbg_rtw_usb_buffer_free(struct usb_device *dev, size_t size, void *addr, dma_addr_t dma, const enum mstat_f flags, const char *func, const int line);
 #endif /* CONFIG_USB_HCI */
 
-#ifdef CONFIG_USE_VMALLOC
-#define rtw_vmalloc_f(sz, mstat_f)			dbg_rtw_vmalloc((sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_VIR, __FUNCTION__, __LINE__)
-#define rtw_zvmalloc_f(sz, mstat_f)		dbg_rtw_zvmalloc((sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_VIR, __FUNCTION__, __LINE__)
-#define rtw_vmfree_f(pbuf, sz, mstat_f)	dbg_rtw_vmfree((pbuf), (sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_VIR, __FUNCTION__, __LINE__)
-#else /* CONFIG_USE_VMALLOC */
-#define rtw_vmalloc_f(sz, mstat_f)			dbg_rtw_malloc((sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
-#define rtw_zvmalloc_f(sz, mstat_f)		dbg_rtw_zmalloc((sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
-#define rtw_vmfree_f(pbuf, sz, mstat_f)	dbg_rtw_mfree((pbuf), (sz), ((mstat_f) & 0xff00) | MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
-#endif /* CONFIG_USE_VMALLOC */
 #define rtw_malloc(sz)			dbg_rtw_malloc((sz), MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
 #define rtw_zmalloc(sz)			dbg_rtw_zmalloc((sz), MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
 #define rtw_mfree(pbuf, sz)		dbg_rtw_mfree((pbuf), (sz), MSTAT_TYPE_PHY, __FUNCTION__, __LINE__)
@@ -210,7 +195,6 @@ void dbg_rtw_usb_buffer_free(struct usb_device *dev, size_t size, void *addr, dm
 #define rtw_mstat_update(flag, status, sz) do {} while (0)
 #define rtw_mstat_dump(sel) do {} while (0)
 #define match_mstat_sniff_rules(flags, size) _FALSE
-void *_rtw_zvmalloc(u32 sz);
 void *_rtw_zmalloc(u32 sz);
 void *_rtw_malloc(u32 sz);
 void _rtw_mfree(void *pbuf, u32 sz);
@@ -233,15 +217,6 @@ void *_rtw_usb_buffer_alloc(struct usb_device *dev, size_t size, dma_addr_t *dma
 void _rtw_usb_buffer_free(struct usb_device *dev, size_t size, void *addr, dma_addr_t dma);
 #endif /* CONFIG_USB_HCI */
 
-#ifdef CONFIG_USE_VMALLOC
-#define rtw_vmalloc_f(sz, mstat_f)			vmalloc((sz))
-#define rtw_zvmalloc_f(sz, mstat_f)		_rtw_zvmalloc((sz))
-#define rtw_vmfree_f(pbuf, sz, mstat_f)	_rtw_vmfree((pbuf), (sz))
-#else /* CONFIG_USE_VMALLOC */
-#define rtw_vmalloc_f(sz, mstat_f)			_rtw_malloc((sz))
-#define rtw_zvmalloc_f(sz, mstat_f)		_rtw_zmalloc((sz))
-#define rtw_vmfree_f(pbuf, sz, mstat_f)	_rtw_mfree((pbuf), (sz))
-#endif /* CONFIG_USE_VMALLOC */
 #define rtw_malloc(sz)			_rtw_malloc((sz))
 #define rtw_zmalloc(sz)			_rtw_zmalloc((sz))
 #define rtw_mfree(pbuf, sz)		_rtw_mfree((pbuf), (sz))
diff --git a/os_dep/osdep_service.c b/os_dep/osdep_service.c
index d5e9c87..d3714a8 100644
--- a/os_dep/osdep_service.c
+++ b/os_dep/osdep_service.c
@@ -65,26 +65,6 @@ u32 rtw_atoi(u8 *s)
 
 }
 
-inline void *_rtw_zvmalloc(u32 sz)
-{
-	void *pbuf;
-#ifdef PLATFORM_LINUX
-	pbuf = vmalloc(sz);
-	if (pbuf != NULL)
-		memset(pbuf, 0, sz);
-#endif
-#ifdef PLATFORM_FREEBSD
-	pbuf = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT);
-#endif
-#ifdef PLATFORM_WINDOWS
-	NdisAllocateMemoryWithTag(&pbuf, sz, RT_TAG);
-	if (pbuf != NULL)
-		NdisFillMemory(pbuf, sz, 0);
-#endif
-
-	return pbuf;
-}
-
 void *_rtw_malloc(u32 sz)
 {
 	void *pbuf = NULL;
@@ -514,42 +494,6 @@ bool match_mstat_sniff_rules(const enum mstat_f flags, const size_t size)
 	return _FALSE;
 }
 
-inline void *dbg_rtw_vmalloc(u32 sz, const enum mstat_f flags, const char *func, const int line)
-{
-	void *p;
-
-	if (match_mstat_sniff_rules(flags, sz))
-		RTW_INFO("DBG_MEM_ALLOC %s:%d %s(%d)\n", func, line, __FUNCTION__, (sz));
-
-	p = vmalloc(sz);
-
-	rtw_mstat_update(
-		flags
-		, p ? MSTAT_ALLOC_SUCCESS : MSTAT_ALLOC_FAIL
-		, sz
-	);
-
-	return p;
-}
-
-inline void *dbg_rtw_zvmalloc(u32 sz, const enum mstat_f flags, const char *func, const int line)
-{
-	void *p;
-
-	if (match_mstat_sniff_rules(flags, sz))
-		RTW_INFO("DBG_MEM_ALLOC %s:%d %s(%d)\n", func, line, __FUNCTION__, (sz));
-
-	p = _rtw_zvmalloc((sz));
-
-	rtw_mstat_update(
-		flags
-		, p ? MSTAT_ALLOC_SUCCESS : MSTAT_ALLOC_FAIL
-		, sz
-	);
-
-	return p;
-}
-
 inline void dbg_rtw_vmfree(void *pbuf, u32 sz, const enum mstat_f flags, const char *func, const int line)
 {