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SUNRPC: Address RCU warning in net/sunrpc/svc.c

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$ 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 913292c97d ("sched.h: Annotate
sighand_struct with __rcu").

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2023-06-16 09:19:45 -04:00
parent a9156d7e7d
commit 00a87e5d1d
1 changed files with 6 additions and 2 deletions
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8
net/sunrpc/svc.c
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@ -1164,6 +1164,7 @@ static void __svc_unregister(struct net *net, const u32 program, const u32 versi
*/ */
static void svc_unregister(const struct svc_serv *serv, struct net *net) static void svc_unregister(const struct svc_serv *serv, struct net *net)
{ {
struct sighand_struct *sighand;
struct svc_program *progp; struct svc_program *progp;
unsigned long flags; unsigned long flags;
unsigned int i; unsigned int i;
@ -1180,9 +1181,12 @@ static void svc_unregister(const struct svc_serv *serv, struct net *net)
} }
} }
spin_lock_irqsave(&current->sighand->siglock, flags); rcu_read_lock();
sighand = rcu_dereference(current->sighand);
spin_lock_irqsave(&sighand->siglock, flags);
recalc_sigpending(); recalc_sigpending();
spin_unlock_irqrestore(&current->sighand->siglock, flags); spin_unlock_irqrestore(&sighand->siglock, flags);
rcu_read_unlock();
} }
/* /*