pidfd: remove unneeded NULL check from pidfd_prepare()

None of the caller actually pass a NULL pid in there.

Link: https://lore.kernel.org/r/20250403-work-pidfd-fixes-v1-2-a123b6ed6716@kernel.org
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/kernel/fork.c b/kernel/fork.c
index c4b26cd8998b8e7b2b516e0bb0b1d4676ff644dc..182ec2e9087d95329168636866fe7d7e2c417c95 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2110,7 +2110,7 @@ int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret)
 {
        bool thread = flags & PIDFD_THREAD;
 
-       if (!pid || !pid_has_task(pid, thread ? PIDTYPE_PID : PIDTYPE_TGID))
+       if (!pid_has_task(pid, thread ? PIDTYPE_PID : PIDTYPE_TGID))
                return -EINVAL;
 
        return __pidfd_prepare(pid, flags, ret);