diff --git a/lib/bitmap.c b/lib/bitmap.c
index a13c7f4..e85040b 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -383,28 +383,7 @@
 int bitmap_scnprintf(char *buf, unsigned int buflen,
 	const unsigned long *maskp, int nmaskbits)
 {
-	int i, word, bit, len = 0;
-	unsigned long val;
-	const char *sep = "";
-	int chunksz;
-	u32 chunkmask;
-
-	chunksz = nmaskbits & (CHUNKSZ - 1);
-	if (chunksz == 0)
-		chunksz = CHUNKSZ;
-
-	i = ALIGN(nmaskbits, CHUNKSZ) - CHUNKSZ;
-	for (; i >= 0; i -= CHUNKSZ) {
-		chunkmask = ((1ULL << chunksz) - 1);
-		word = i / BITS_PER_LONG;
-		bit = i % BITS_PER_LONG;
-		val = (maskp[word] >> bit) & chunkmask;
-		len += scnprintf(buf+len, buflen-len, "%s%0*lx", sep,
-			(chunksz+3)/4, val);
-		chunksz = CHUNKSZ;
-		sep = ",";
-	}
-	return len;
+	return scnprintf(buf, buflen, "%*pb", nmaskbits, maskp);
 }
 EXPORT_SYMBOL(bitmap_scnprintf);
 
@@ -521,25 +500,6 @@
 }
 EXPORT_SYMBOL(bitmap_parse_user);
 
-/*
- * bscnl_emit(buf, buflen, rbot, rtop, bp)
- *
- * Helper routine for bitmap_scnlistprintf().  Write decimal number
- * or range to buf, suppressing output past buf+buflen, with optional
- * comma-prefix.  Return len of what was written to *buf, excluding the
- * trailing \0.
- */
-static inline int bscnl_emit(char *buf, int buflen, int rbot, int rtop, int len)
-{
-	if (len > 0)
-		len += scnprintf(buf + len, buflen - len, ",");
-	if (rbot == rtop)
-		len += scnprintf(buf + len, buflen - len, "%d", rbot);
-	else
-		len += scnprintf(buf + len, buflen - len, "%d-%d", rbot, rtop);
-	return len;
-}
-
 /**
  * bitmap_scnlistprintf - convert bitmap to list format ASCII string
  * @buf: byte buffer into which string is placed
@@ -559,24 +519,7 @@
 int bitmap_scnlistprintf(char *buf, unsigned int buflen,
 	const unsigned long *maskp, int nmaskbits)
 {
-	int len = 0;
-	/* current bit is 'cur', most recently seen range is [rbot, rtop] */
-	int cur, rbot, rtop;
-
-	if (buflen == 0)
-		return 0;
-	buf[0] = 0;
-
-	rbot = cur = find_first_bit(maskp, nmaskbits);
-	while (cur < nmaskbits) {
-		rtop = cur;
-		cur = find_next_bit(maskp, nmaskbits, cur+1);
-		if (cur >= nmaskbits || cur > rtop + 1) {
-			len = bscnl_emit(buf, buflen, rbot, rtop, len);
-			rbot = cur;
-		}
-	}
-	return len;
+	return scnprintf(buf, buflen, "%*pbl", nmaskbits, maskp);
 }
 EXPORT_SYMBOL(bitmap_scnlistprintf);
 
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 602d208..b235c96 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -794,6 +794,87 @@
 }
 
 static noinline_for_stack
+char *bitmap_string(char *buf, char *end, unsigned long *bitmap,
+		    struct printf_spec spec, const char *fmt)
+{
+	const int CHUNKSZ = 32;
+	int nr_bits = max_t(int, spec.field_width, 0);
+	int i, chunksz;
+	bool first = true;
+
+	/* reused to print numbers */
+	spec = (struct printf_spec){ .flags = SMALL | ZEROPAD, .base = 16 };
+
+	chunksz = nr_bits & (CHUNKSZ - 1);
+	if (chunksz == 0)
+		chunksz = CHUNKSZ;
+
+	i = ALIGN(nr_bits, CHUNKSZ) - CHUNKSZ;
+	for (; i >= 0; i -= CHUNKSZ) {
+		u32 chunkmask, val;
+		int word, bit;
+
+		chunkmask = ((1ULL << chunksz) - 1);
+		word = i / BITS_PER_LONG;
+		bit = i % BITS_PER_LONG;
+		val = (bitmap[word] >> bit) & chunkmask;
+
+		if (!first) {
+			if (buf < end)
+				*buf = ',';
+			buf++;
+		}
+		first = false;
+
+		spec.field_width = DIV_ROUND_UP(chunksz, 4);
+		buf = number(buf, end, val, spec);
+
+		chunksz = CHUNKSZ;
+	}
+	return buf;
+}
+
+static noinline_for_stack
+char *bitmap_list_string(char *buf, char *end, unsigned long *bitmap,
+			 struct printf_spec spec, const char *fmt)
+{
+	int nr_bits = max_t(int, spec.field_width, 0);
+	/* current bit is 'cur', most recently seen range is [rbot, rtop] */
+	int cur, rbot, rtop;
+	bool first = true;
+
+	/* reused to print numbers */
+	spec = (struct printf_spec){ .base = 10 };
+
+	rbot = cur = find_first_bit(bitmap, nr_bits);
+	while (cur < nr_bits) {
+		rtop = cur;
+		cur = find_next_bit(bitmap, nr_bits, cur + 1);
+		if (cur < nr_bits && cur <= rtop + 1)
+			continue;
+
+		if (!first) {
+			if (buf < end)
+				*buf = ',';
+			buf++;
+		}
+		first = false;
+
+		buf = number(buf, end, rbot, spec);
+		if (rbot < rtop) {
+			if (buf < end)
+				*buf = '-';
+			buf++;
+
+			buf = number(buf, end, rtop, spec);
+		}
+
+		rbot = cur;
+	}
+	return buf;
+}
+
+static noinline_for_stack
 char *mac_address_string(char *buf, char *end, u8 *addr,
 			 struct printf_spec spec, const char *fmt)
 {
@@ -1258,6 +1339,10 @@
  * - 'B' For backtraced symbolic direct pointers with offset
  * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
  * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
+ * - 'b[l]' For a bitmap, the number of bits is determined by the field
+ *       width which must be explicitly specified either as part of the
+ *       format string '%32b[l]' or through '%*b[l]', [l] selects
+ *       range-list format instead of hex format
  * - 'M' For a 6-byte MAC address, it prints the address in the
  *       usual colon-separated hex notation
  * - 'm' For a 6-byte MAC address, it prints the hex address without colons
@@ -1354,6 +1439,13 @@
 		return resource_string(buf, end, ptr, spec, fmt);
 	case 'h':
 		return hex_string(buf, end, ptr, spec, fmt);
+	case 'b':
+		switch (fmt[1]) {
+		case 'l':
+			return bitmap_list_string(buf, end, ptr, spec, fmt);
+		default:
+			return bitmap_string(buf, end, ptr, spec, fmt);
+		}
 	case 'M':			/* Colon separated: 00:01:02:03:04:05 */
 	case 'm':			/* Contiguous: 000102030405 */
 					/* [mM]F (FDDI) */
@@ -1689,6 +1781,8 @@
  * %pB output the name of a backtrace symbol with its offset
  * %pR output the address range in a struct resource with decoded flags
  * %pr output the address range in a struct resource with raw flags
+ * %pb output the bitmap with field width as the number of bits
+ * %pbl output the bitmap as range list with field width as the number of bits
  * %pM output a 6-byte MAC address with colons
  * %pMR output a 6-byte MAC address with colons in reversed order
  * %pMF output a 6-byte MAC address with dashes