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mptcp: fix syncookie build error on UP 

kernel test robot says:
net/mptcp/syncookies.c: In function 'mptcp_join_cookie_init':
include/linux/kernel.h:47:38: warning: division by zero [-Wdiv-by-zero]
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

I forgot that spinock_t size is 0 on UP, so ARRAY_SIZE cannot be used.

Fixes: 9466a1cceb ("mptcp: enable JOIN requests even if cookies are in use")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2020-08-01 16:39:59 +02:00 committed by David S. Miller
parent 8b66a6fd34
commit 7126bd5c8b
1 changed files with 1 additions and 3 deletions
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4
net/mptcp/syncookies.c
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@ -125,8 +125,6 @@ void __init mptcp_join_cookie_init(void)
{ {
int i; int i;
for (i = 0; i < ARRAY_SIZE(join_entry_locks); i++) for (i = 0; i < COOKIE_JOIN_SLOTS; i++)
spin_lock_init(&join_entry_locks[i]); spin_lock_init(&join_entry_locks[i]);
BUILD_BUG_ON(ARRAY_SIZE(join_entry_locks) != ARRAY_SIZE(join_entries));
} }