bpfilter_umh_cleanup() is the same function as umd_cleanup_helper().
Drop the redundant function.

Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 include/linux/bpfilter.h     |  1 -
 net/bpfilter/bpfilter_kern.c |  2 +-
 net/ipv4/bpfilter/sockopt.c  | 11 +----------
 3 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/include/linux/bpfilter.h b/include/linux/bpfilter.h
index 2ae3c8e1d83c..736ded4905e0 100644
--- a/include/linux/bpfilter.h
+++ b/include/linux/bpfilter.h
@@ -11,7 +11,6 @@ int bpfilter_ip_set_sockopt(struct sock *sk, int optname, sockptr_t optval,
 			    unsigned int optlen);
 int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval,
 			    int __user *optlen);
-void bpfilter_umh_cleanup(struct umd_info *info);
 
 struct bpfilter_umh_ops {
 	struct umd_info info;
diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index 422ec6e7ccff..97e129e3f31c 100644
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -21,7 +21,7 @@ static void shutdown_umh(void)
 	if (tgid) {
 		kill_pid(tgid, SIGKILL, 1);
 		wait_event(tgid->wait_pidfd, thread_group_exited(tgid));
-		bpfilter_umh_cleanup(info);
+		umd_cleanup_helper(info);
 	}
 }
 
diff --git a/net/ipv4/bpfilter/sockopt.c b/net/ipv4/bpfilter/sockopt.c
index 1b34cb9a7708..193bcc2acccc 100644
--- a/net/ipv4/bpfilter/sockopt.c
+++ b/net/ipv4/bpfilter/sockopt.c
@@ -12,15 +12,6 @@
 struct bpfilter_umh_ops bpfilter_ops;
 EXPORT_SYMBOL_GPL(bpfilter_ops);
 
-void bpfilter_umh_cleanup(struct umd_info *info)
-{
-	fput(info->pipe_to_umh);
-	fput(info->pipe_from_umh);
-	put_pid(info->tgid);
-	info->tgid = NULL;
-}
-EXPORT_SYMBOL_GPL(bpfilter_umh_cleanup);
-
 static int bpfilter_mbox_request(struct sock *sk, int optname, sockptr_t optval,
 				 unsigned int optlen, bool is_set)
 {
@@ -38,7 +29,7 @@ static int bpfilter_mbox_request(struct sock *sk, int optname, sockptr_t optval,
 	}
 	if (bpfilter_ops.info.tgid &&
 	    thread_group_exited(bpfilter_ops.info.tgid))
-		bpfilter_umh_cleanup(&bpfilter_ops.info);
+		umd_cleanup_helper(&bpfilter_ops.info);
 
 	if (!bpfilter_ops.info.tgid) {
 		err = bpfilter_ops.start();
-- 
2.39.2

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@iogearbox.net>:

On Fri, 26 May 2023 14:21:02 +0300 you wrote:
> bpfilter_umh_cleanup() is the same function as umd_cleanup_helper().
> Drop the redundant function.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
> ---
>  include/linux/bpfilter.h     |  1 -
>  net/bpfilter/bpfilter_kern.c |  2 +-
>  net/ipv4/bpfilter/sockopt.c  | 11 +----------
>  3 files changed, 2 insertions(+), 12 deletions(-)

Here is the summary with links:
  - net: use umd_cleanup_helper()
    https://git.kernel.org/bpf/bpf-next/c/9b68f30b6870

You are awesome, thank you!
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