selftests: mptcp: fix const qualifier warnings in strchr usage

In mptcp_connect.c, strchr() returns a pointer to a character within
the input string, which is declared as const char *. Assigning this
return value to a non-const char * discards the const qualifier,
triggering compiler warnings:

 make: Entering directory 'tools/testing/selftests/net/mptcp'
   CC       mptcp_connect
 mptcp_connect.c: In function 'parse_cmsg_types':
 mptcp_connect.c:1267:22: warning: initialization discards 'const'
	qualifier from pointer target type [-Wdiscarded-qualifiers]
  1267 |         char *next = strchr(type, ',');
       |                      ^~~~~~
 mptcp_connect.c: In function 'parse_setsock_options':
 mptcp_connect.c:1295:22: warning: initialization discards 'const'
	qualifier from pointer target type [-Wdiscarded-qualifiers]
  1295 |         char *next = strchr(name, ',');
       |                      ^~~~~~
 make: Leaving directory 'tools/testing/selftests/net/mptcp'

Fix these warnings by declaring the 'next' variable as const char *,
as it is only used for read-only parsing.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260812-net-next-mptcp-misc-feat-7-3-v1-10-1905a818f6cb@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions