[PATCH net] ipv6: ndisc: adjust ndisc_ifinfo_sysctl_change prototype

[Tobias Klauser]

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ndisc_ifinfo_sysctl_change to take a kernel pointer. Adjust its
prototype in net/ndisc.h as well to fix the following sparse warning:

net/ipv6/ndisc.c:1838:5: error: symbol 'ndisc_ifinfo_sysctl_change' redeclared 
with different type (incompatible argument 3 (different address spaces)):
net/ipv6/ndisc.c:1838:5:    int extern [addressable] [signed] [toplevel] 
ndisc_ifinfo_sysctl_change( ... )
net/ipv6/ndisc.c: note: in included file (through include/net/ipv6.h):
./include/net/ndisc.h:496:5: note: previously declared as:
./include/net/ndisc.h:496:5:    int extern [addressable] [signed] [toplevel] 
ndisc_ifinfo_sysctl_change( ... )
net/ipv6/ndisc.c: note: in included file (through include/net/ip6_route.h):

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Cc: Christoph Hellwig <h...@lst.de>
Signed-off-by: Tobias Klauser <tklau...@distanz.ch>
---
 include/net/ndisc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 9205a76d967a..38e4094960ce 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -494,7 +494,7 @@ int igmp6_event_report(struct sk_buff *skb);
 
 #ifdef CONFIG_SYSCTL
 int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write,
-                              void __user *buffer, size_t *lenp, loff_t *ppos);
+                              void *buffer, size_t *lenp, loff_t *ppos);
 int ndisc_ifinfo_sysctl_strategy(struct ctl_table *ctl,
                                 void __user *oldval, size_t __user *oldlenp,
                                 void __user *newval, size_t newlen);
-- 
2.27.0