diff options
| author | Joel Fernandes (Google) <joel@joelfernandes.org> | 2019-09-25 16:48:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-25 17:51:41 -0700 |
| commit | 984035ad7b247ccc62b06e113eea3fc673f114cc (patch) | |
| tree | bb85fbe649e8118d1ee3f55b4745443dd89371bd | |
| parent | c231740dd95e854de5034cff8f49737d942bc098 (diff) | |
ipc/sem.c: convert to use built-in RCU list checking
CONFIG_PROVE_RCU_LIST requires list_for_each_entry_rcu() to pass a lockdep
expression if using srcu or locking for protection. It can only check
regular RCU protection, all other protection needs to be passed as lockdep
expression.
Link: http://lkml.kernel.org/r/20190830231817.76862-2-joel@joelfernandes.org
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Jonathan Derrick <jonathan.derrick@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | ipc/sem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 7da4504bcc7c..ec97a7072413 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -1852,7 +1852,8 @@ static struct sem_undo *__lookup_undo(struct sem_undo_list *ulp, int semid) { struct sem_undo *un; - list_for_each_entry_rcu(un, &ulp->list_proc, list_proc) { + list_for_each_entry_rcu(un, &ulp->list_proc, list_proc, + spin_is_locked(&ulp->lock)) { if (un->semid == semid) return un; } |