+ selftests-mm-mseal-self_elf-fix-missing-__nr_mseal.patch added to mm-unstable branch

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

The patch titled
     Subject: selftests/mm: mseal, self_elf: fix missing __NR_mseal
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-mm-mseal-self_elf-fix-missing-__nr_mseal.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-mseal-self_elf-fix-missing-__nr_mseal.patch

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

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------------------------------------------------------
From: John Hubbard <jhubbard@nvidia.com>
Subject: selftests/mm: mseal, self_elf: fix missing __NR_mseal
Date: Mon, 17 Jun 2024 19:24:17 -0700

Patch series "cleanups, fixes, and progress towards avoiding "make
headers"", v3.

Eventually, once the build succeeds on a sufficiently old distro, the idea
is to delete $(KHDR_INCLUDES) from the selftests/mm build, and then after
that, from selftests/lib.mk and all of the other selftest builds.

For now, this series merely achieves a clean build of selftests/mm on a
not-so-old distro: Ubuntu 23.04.  In other words, after this series is
applied, it is possible to delete $(KHDR_INCLUDES) from
selftests/mm/Makefile and the build will still succeed.

1. Add tools/uapi/asm/unistd_[32|x32|64].h files, which include
   definitions of __NR_mseal, and include them (indirectly) from the files
   that use __NR_mseal.  The new files are copied from ./usr/include/asm,
   which is how we have agreed to do this sort of thing, see [1].

2. Add fs.h, similarly created: it was copied directly from a snapshot
   of ./usr/include/linux/fs.h after running "make headers".

3. Add a few selected prctl.h values that the ksm and mdwe tests require.

4. Factor out some common code from mseal_test.c and seal_elf.c, into
   a new mseal_helpers.h file.

5. Remove local __NR_* definitions and checks.

[1] commit e076eaca5906 ("selftests: break the dependency upon local
header files")


This patch (of 6):

The selftests/mm build isn't exactly "broken", according to the current
documentation, which still claims that one must run "make headers", before
building the kselftests.  However, according to the new plan to get rid of
that requirement [1], they are future-broken: attempting to build
selftests/mm *without* first running "make headers" will fail due to not
finding __NR_mseal.

Therefore, include asm-generic/unistd.h, which has all of the system call
numbers that are needed, abstracted across the various CPU arches.

[1] commit e076eaca5906 ("selftests: break the dependency upon local
header files")

Link: https://lkml.kernel.org/r/20240618022422.804305-1-jhubbard@nvidia.com
Link: https://lkml.kernel.org/r/20240618022422.804305-2-jhubbard@nvidia.com
Fixes: 4926c7a52de7 ("selftest mm/mseal memory sealing")
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Andrei Vagin <avagin@google.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/mm/mseal_test.c |    2 +-
 tools/testing/selftests/mm/seal_elf.c   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/mm/mseal_test.c~selftests-mm-mseal-self_elf-fix-missing-__nr_mseal
+++ a/tools/testing/selftests/mm/mseal_test.c
@@ -3,7 +3,7 @@
 #include <linux/mman.h>
 #include <sys/mman.h>
 #include <stdint.h>
-#include <unistd.h>
+#include <asm-generic/unistd.h>
 #include <string.h>
 #include <sys/time.h>
 #include <sys/resource.h>
--- a/tools/testing/selftests/mm/seal_elf.c~selftests-mm-mseal-self_elf-fix-missing-__nr_mseal
+++ a/tools/testing/selftests/mm/seal_elf.c
@@ -2,7 +2,7 @@
 #define _GNU_SOURCE
 #include <sys/mman.h>
 #include <stdint.h>
-#include <unistd.h>
+#include <asm-generic/unistd.h>
 #include <string.h>
 #include <sys/time.h>
 #include <sys/resource.h>
_

Patches currently in -mm which might be from jhubbard@nvidia.com are

selftests-mm-mseal-self_elf-fix-missing-__nr_mseal.patch
selftests-mm-mseal-self_elf-factor-out-test-macros-and-other-duplicated-items.patch
selftests-mm-mseal-self_elf-factor-out-test-macros-and-other-duplicated-items-fix.patch
selftests-mm-mseal-self_elf-rename-test_end_check-to-report_test_pass.patch
selftests-mm-fix-vm_utilc-build-failures-add-snapshot-of-fsh.patch
selftests-mm-kvm-mdwe-fixes-to-avoid-requiring-make-headers.patch
selftests-mm-remove-local-__nr_-definitions.patch
selftests-mqueue-fix-5-warnings-about-signed-unsigned-mismatches.patch