diff --git a/lib/libfdt/fdt.c b/lib/libfdt/fdt.c
index ae03b11..7855a17 100644
--- a/lib/libfdt/fdt.c
+++ b/lib/libfdt/fdt.c
@@ -55,12 +55,7 @@
 
 #include "libfdt_internal.h"
 
-/*
- * Minimal sanity check for a read-only tree. fdt_ro_probe_() checks
- * that the given buffer contains what appears to be a flattened
- * device tree with sane information in its header.
- */
-int fdt_ro_probe_(const void *fdt)
+int fdt_check_header(const void *fdt)
 {
 	if (fdt_magic(fdt) == FDT_MAGIC) {
 		/* Complete tree */
@@ -79,78 +74,6 @@
 	return 0;
 }
 
-static int check_off_(uint32_t hdrsize, uint32_t totalsize, uint32_t off)
-{
-	return (off >= hdrsize) && (off <= totalsize);
-}
-
-static int check_block_(uint32_t hdrsize, uint32_t totalsize,
-			uint32_t base, uint32_t size)
-{
-	if (!check_off_(hdrsize, totalsize, base))
-		return 0; /* block start out of bounds */
-	if ((base + size) < base)
-		return 0; /* overflow */
-	if (!check_off_(hdrsize, totalsize, base + size))
-		return 0; /* block end out of bounds */
-	return 1;
-}
-
-size_t fdt_header_size_(uint32_t version)
-{
-	if (version <= 1)
-		return FDT_V1_SIZE;
-	else if (version <= 2)
-		return FDT_V2_SIZE;
-	else if (version <= 3)
-		return FDT_V3_SIZE;
-	else if (version <= 16)
-		return FDT_V16_SIZE;
-	else
-		return FDT_V17_SIZE;
-}
-
-int fdt_check_header(const void *fdt)
-{
-	size_t hdrsize;
-
-	if (fdt_magic(fdt) != FDT_MAGIC)
-		return -FDT_ERR_BADMAGIC;
-	hdrsize = fdt_header_size(fdt);
-	if ((fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
-	    || (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION))
-		return -FDT_ERR_BADVERSION;
-	if (fdt_version(fdt) < fdt_last_comp_version(fdt))
-		return -FDT_ERR_BADVERSION;
-
-	if ((fdt_totalsize(fdt) < hdrsize)
-	    || (fdt_totalsize(fdt) > INT_MAX))
-		return -FDT_ERR_TRUNCATED;
-
-	/* Bounds check memrsv block */
-	if (!check_off_(hdrsize, fdt_totalsize(fdt), fdt_off_mem_rsvmap(fdt)))
-		return -FDT_ERR_TRUNCATED;
-
-	/* Bounds check structure block */
-	if (fdt_version(fdt) < 17) {
-		if (!check_off_(hdrsize, fdt_totalsize(fdt),
-				fdt_off_dt_struct(fdt)))
-			return -FDT_ERR_TRUNCATED;
-	} else {
-		if (!check_block_(hdrsize, fdt_totalsize(fdt),
-				  fdt_off_dt_struct(fdt),
-				  fdt_size_dt_struct(fdt)))
-			return -FDT_ERR_TRUNCATED;
-	}
-
-	/* Bounds check strings block */
-	if (!check_block_(hdrsize, fdt_totalsize(fdt),
-			  fdt_off_dt_strings(fdt), fdt_size_dt_strings(fdt)))
-		return -FDT_ERR_TRUNCATED;
-
-	return 0;
-}
-
 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
 {
 	unsigned absoffset = offset + fdt_off_dt_struct(fdt);
@@ -321,7 +244,7 @@
 
 int fdt_move(const void *fdt, void *buf, int bufsize)
 {
-	FDT_RO_PROBE(fdt);
+	FDT_CHECK_HEADER(fdt);
 
 	if (fdt_totalsize(fdt) > bufsize)
 		return -FDT_ERR_NOSPACE;