+ selftests-ipc-change-operation-not-supported-error-number.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: selftests: ipc: change operation not supported error number
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     selftests-ipc-change-operation-not-supported-error-number.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-ipc-change-operation-not-supported-error-number.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Paul White <paul.white.kernel@gmail.com>
Subject: selftests: ipc: change operation not supported error number
Date: Mon, 20 Jul 2026 16:40:01 -0400

The application doesn't know what ENOTSUPP means, as it is a kernelspace
error code and the application doesn't have access to kernelspace error
codes.I used EOPNOTSUPP in its place as that is an error number the
application will recognize and know an operation is being attempted that
it cannot support.

Link: https://lore.kernel.org/20260720204001.1663473-1-paul.white.kernel@gmail.com
Signed-off-by: Paul White <paul.white.kernel@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/ipc/msgque.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/testing/selftests/ipc/msgque.c~selftests-ipc-change-operation-not-supported-error-number
+++ a/tools/testing/selftests/ipc/msgque.c
@@ -161,7 +161,7 @@ int dump_queue(struct msgque_data *msgqu
 		ret = msgrcv(msgque->msq_id, &msgque->messages[i].mtype,
 				MAX_MSG_SIZE, i, IPC_NOWAIT | MSG_COPY);
 		if (ret < 0) {
-			if (errno == ENOSYS)
+			if (errno == EOPNOTSUPP)
 				ksft_exit_skip("MSG_COPY not supported\n");
 
 			ksft_test_result_fail("Failed to copy IPC message: %m (%d)\n", errno);
_

Patches currently in -mm which might be from paul.white.kernel@gmail.com are

selftests-ipc-change-operation-not-supported-error-number.patch