[PATCH 06/17] net: ipv6: Enable IPv6 typeconversion specifier

[Viacheslav Mitrofanov]

Add the possibility to recognize IPv6 address in print function.
To output IPv6 address use %pI6 specifier.

Signed-off-by: Viacheslav Mitrofanov <v.v.mitrofanov at yadro.com>
---
 lib/vsprintf.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index fe06aa2d71..d5856b1cbe 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -346,6 +346,7 @@ static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
 		      flags & ~SPECIAL);
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
 			 int precision, int flags)
 {
@@ -365,6 +366,7 @@ static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
 	return string(buf, end, ip6_addr, field_width, precision,
 		      flags & ~SPECIAL);
 }
+#endif
 
 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
 			 int precision, int flags)
@@ -450,10 +452,6 @@ static char *uuid_string(char *buf, char *end, u8 *addr, int field_width,
  *       decimal for v4 and colon separated network-order 16 bit hex for v6)
  * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
  *       currently the same
- *
- * Note: IPv6 support is currently if(0)'ed out. If you ever need
- * %pI6, please add an IPV6 Kconfig knob, make your code select or
- * depend on that, and change the 0 below to CONFIG_IS_ENABLED(IPV6).
  */
 static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 		int field_width, int precision, int flags)
@@ -498,10 +496,11 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 		flags |= SPECIAL;
 		/* Fallthrough */
 	case 'I':
-		/* %pI6 currently unused */
-		if (0 && fmt[1] == '6')
+#if IS_ENABLED(CONFIG_IPV6)
+		if (fmt[1] == '6')
 			return ip6_addr_string(buf, end, ptr, field_width,
 					       precision, flags);
+#endif
 		if (fmt[1] == '4')
 			return ip4_addr_string(buf, end, ptr, field_width,
 					       precision, flags);
-- 
2.25.1