[PATCH v3 06/11] signal: Use lockdep_assert_held instead of assert_spin_locked

Eric W. Biederman
2022-05-04T22:40:53Z

The distinction is that assert_spin_locked() checks if the lock is
held *by*anyone* whereas lockdep_assert_held() asserts the current
context holds the lock. Also, the check goes away if you build
without lockdep.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/Ympr/+PX4XgT/UKU@hirez.programming.kicks-ass.net
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
kernel/signal.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index 72d96614effc..3fd2ce133387 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -884,7 +884,7 @@ static int check_kill_permission(int sig, struct kernel_siginfo *info,
static void ptrace_trap_notify(struct task_struct *t)
{
WARN_ON_ONCE(!(t->ptrace & PT_SEIZED));
- assert_spin_locked(&t->sighand->siglock);
+ lockdep_assert_held(&t->sighand->siglock);

task_set_jobctl_pending(t, JOBCTL_TRAP_NOTIFY);
ptrace_signal_wake_up(t, t->jobctl & JOBCTL_LISTENING);
@@ -1079,7 +1079,7 @@ static int __send_signal_locked(int sig, struct kernel_siginfo *info,
int override_rlimit;
int ret = 0, result;

- assert_spin_locked(&t->sighand->siglock);
+ lockdep_assert_held(&t->sighand->siglock);

result = TRACE_SIGNAL_IGNORED;
if (!prepare_signal(sig, t, force))
--
2.35.3