SUNRPC: Address RCU warning in net/sunrpc/svc.c
$ make C=1 W=1 net/sunrpc/svc.o
make[1]: Entering directory 'linux/obj/manet.1015granger.net'
GEN Makefile
CALL linux/server-development/scripts/checksyscalls.sh
DESCEND objtool
INSTALL libsubcmd_headers
DESCEND bpf/resolve_btfids
INSTALL libsubcmd_headers
CC [M] net/sunrpc/svc.o
CHECK linux/server-development/net/sunrpc/svc.c
linux/server-development/net/sunrpc/svc.c:1225:9: warning: incorrect type in argument 1 (different address spaces)
linux/server-development/net/sunrpc/svc.c:1225:9: expected struct spinlock [usertype] *lock
linux/server-development/net/sunrpc/svc.c:1225:9: got struct spinlock [noderef] __rcu *
linux/server-development/net/sunrpc/svc.c:1227:40: warning: incorrect type in argument 1 (different address spaces)
linux/server-development/net/sunrpc/svc.c:1227:40: expected struct spinlock [usertype] *lock
linux/server-development/net/sunrpc/svc.c:1227:40: got struct spinlock [noderef] __rcu *
make[1]: Leaving directory 'linux/obj/manet.1015granger.net'
Warning introduced by commit
913292c97d75 ("sched.h: Annotate
sighand_struct with __rcu").
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>