Backport a patch to allow compiles with 6.18 kernel.

Signed-off-by: Richard Purdie <[email protected]>
---
 ...6ead3d6ef504c82551b12306e751d23ddb45.patch | 193 ++++++++++++++++++
 meta/recipes-extended/ltp/ltp_20250930.bb     |   3 +-
 2 files changed, 195 insertions(+), 1 deletion(-)
 create mode 100644 
meta/recipes-extended/ltp/ltp/2d066ead3d6ef504c82551b12306e751d23ddb45.patch

diff --git 
a/meta/recipes-extended/ltp/ltp/2d066ead3d6ef504c82551b12306e751d23ddb45.patch 
b/meta/recipes-extended/ltp/ltp/2d066ead3d6ef504c82551b12306e751d23ddb45.patch
new file mode 100644
index 00000000000..1c06e254000
--- /dev/null
+++ 
b/meta/recipes-extended/ltp/ltp/2d066ead3d6ef504c82551b12306e751d23ddb45.patch
@@ -0,0 +1,193 @@
+From 2d066ead3d6ef504c82551b12306e751d23ddb45 Mon Sep 17 00:00:00 2001
+From: Wei Gao <[email protected]>
+Date: Sun, 14 Dec 2025 02:15:20 +0000
+Subject: [PATCH] listmount04.c: Update struct mnt_id_req support for kernel >= 
6.18
+
+Kernel change from v6.18-rc7
+78f0e33cd6c93 ("fs/namespace: correctly handle errors returned by 
grab_requested_mnt_ns")
+causes the test failure with following error message:
+listmount04.c:128: TFAIL: invalid mnt_id_req.spare expected EINVAL: EBADF (9)
+
+The fix require following changes:
+
+* struct mnt_id_req got new member mnt_ns_fd in v6.18-rc7.  That is
+fixed in a fallback defintion in lapi/. If the fallback is used is now
+done via typedef (that requires also update in statmount.h).
+
+* New kernels (>= 6.18) have also different errno. This is fixed by
+runtime check.
+
+Link: https://lore.kernel.org/ltp/[email protected]/
+Reviewed-by: Petr Vorel <[email protected]>
+Reviewed-by: Li Wang <[email protected]>
+Reviewed-by: Cyril Hrubis <[email protected]>
+Signed-off-by: Wei Gao <[email protected]>
+[ pvorel: Shorten TCONF, rewrite commit message ]
+Signed-off-by: Petr Vorel <[email protected]>
+---
+ configure.ac                                  |  2 +-
+ include/lapi/mount.h                          | 10 +++--
+ .../kernel/syscalls/listmount/listmount.h     |  2 +-
+ .../kernel/syscalls/listmount/listmount04.c   | 37 +++++++++++++++++--
+ .../kernel/syscalls/statmount/statmount.h     |  2 +-
+ 5 files changed, 44 insertions(+), 9 deletions(-)
+
+Upstream-Status: Backport
+
+Index: ltp-20250930/configure.ac
+===================================================================
+--- ltp-20250930.orig/configure.ac
++++ ltp-20250930/configure.ac
+@@ -262,7 +262,7 @@ AC_CHECK_TYPES([struct cachestat_range],
+ AC_CHECK_TYPES([struct cachestat],,,[#include <sys/mman.h>])
+ 
+ # Defined in <linux/mount.h>, but include/lapi/mount.h includes <sys/mount.h> 
*/
+-AC_CHECK_TYPES([struct mnt_id_req],,,[#include <sys/mount.h>])
++AC_CHECK_MEMBERS([struct mnt_id_req.mnt_ns_fd],,,[#include <sys/mount.h>])
+ AC_CHECK_TYPES([struct statmount],,,[#include <sys/mount.h>])
+ AC_CHECK_MEMBERS([struct statmount.mnt_ns_id],,,[#include <unistd.h>
+ #include <linux/mount.h>])
+Index: ltp-20250930/include/lapi/mount.h
+===================================================================
+--- ltp-20250930.orig/include/lapi/mount.h
++++ ltp-20250930/include/lapi/mount.h
+@@ -45,14 +45,18 @@
+ # define MS_NOSYMFOLLOW 256
+ #endif
+ 
+-#ifndef HAVE_STRUCT_MNT_ID_REQ
+-struct mnt_id_req {
++struct mnt_id_req_fallback {
+       uint32_t size;
+-      uint32_t spare;
++      uint32_t mnt_ns_fd;
+       uint64_t mnt_id;
+       uint64_t param;
+       uint64_t mnt_ns_id;
+ };
++
++#ifndef HAVE_STRUCT_MNT_ID_REQ_MNT_NS_FD
++typedef struct mnt_id_req_fallback mnt_id_req;
++#else
++typedef struct mnt_id_req mnt_id_req;
+ #endif
+ 
+ #ifndef HAVE_STRUCT_STATMOUNT
+Index: ltp-20250930/testcases/kernel/syscalls/listmount/listmount.h
+===================================================================
+--- ltp-20250930.orig/testcases/kernel/syscalls/listmount/listmount.h
++++ ltp-20250930/testcases/kernel/syscalls/listmount/listmount.h
+@@ -15,7 +15,7 @@
+ static inline ssize_t listmount(uint64_t mnt_id, uint64_t last_mnt_id,
+                        uint64_t list[], size_t num, unsigned int flags)
+ {
+-      struct mnt_id_req req = {
++      mnt_id_req req = {
+               .size = MNT_ID_REQ_SIZE_VER0,
+               .mnt_id = mnt_id,
+               .param = last_mnt_id,
+Index: ltp-20250930/testcases/kernel/syscalls/listmount/listmount04.c
+===================================================================
+--- ltp-20250930.orig/testcases/kernel/syscalls/listmount/listmount04.c
++++ ltp-20250930/testcases/kernel/syscalls/listmount/listmount04.c
+@@ -14,14 +14,18 @@
+ 
+ #define _GNU_SOURCE
+ 
++#include "config.h"
+ #include "tst_test.h"
+ #include "lapi/mount.h"
+ #include "lapi/syscalls.h"
+ 
+ #define MNT_SIZE 32
++#define BEFORE_6_18 1
++#define AFTER_6_18 2
+ 
+-static struct mnt_id_req *request;
++static mnt_id_req *request;
+ static uint64_t mnt_ids[MNT_SIZE];
++static int kver;
+ 
+ static struct tcase {
+       int req_usage;
+@@ -34,6 +38,7 @@ static struct tcase {
+       uint64_t flags;
+       int exp_errno;
+       char *msg;
++      int kver;
+ } tcases[] = {
+       {
+               .req_usage = 0,
+@@ -79,6 +84,18 @@ static struct tcase {
+               .nr_mnt_ids = MNT_SIZE,
+               .exp_errno = EINVAL,
+               .msg = "invalid mnt_id_req.spare",
++              .kver = BEFORE_6_18,
++      },
++      {
++              .req_usage = 1,
++              .size = MNT_ID_REQ_SIZE_VER0,
++              .spare = -1,
++              .mnt_id = LSMT_ROOT,
++              .mnt_ids = mnt_ids,
++              .nr_mnt_ids = MNT_SIZE,
++              .exp_errno = EBADF,
++              .msg = "invalid mnt_id_req.mnt_ns_fd",
++              .kver = AFTER_6_18,
+       },
+       {
+               .req_usage = 1,
+@@ -113,7 +130,12 @@ static struct tcase {
+ static void run(unsigned int n)
+ {
+       struct tcase *tc = &tcases[n];
+-      struct mnt_id_req *req = NULL;
++      mnt_id_req *req = NULL;
++
++      if (tc->kver && tc->kver != kver) {
++              tst_res(TCONF, "Test not suitable for current kernel version");
++              return;
++      }
+ 
+       memset(mnt_ids, 0, sizeof(mnt_ids));
+ 
+@@ -122,7 +144,7 @@ static void run(unsigned int n)
+               req->mnt_id = tc->mnt_id;
+               req->param = tc->param;
+               req->size = tc->size;
+-              req->spare = tc->spare;
++              req->mnt_ns_fd = tc->spare;
+       }
+ 
+       TST_EXP_FAIL(tst_syscall(__NR_listmount, req, tc->mnt_ids,
+@@ -130,8 +152,17 @@ static void run(unsigned int n)
+               "%s", tc->msg);
+ }
+ 
++static void setup(void)
++{
++      if (tst_kvercmp(6, 18, 0) >= 0)
++              kver = AFTER_6_18;
++      else
++              kver = BEFORE_6_18;
++}
++
+ static struct tst_test test = {
+       .test = run,
++      .setup = setup,
+       .tcnt = ARRAY_SIZE(tcases),
+       .min_kver = "6.8",
+       .bufs = (struct tst_buffers []) {
+Index: ltp-20250930/testcases/kernel/syscalls/statmount/statmount.h
+===================================================================
+--- ltp-20250930.orig/testcases/kernel/syscalls/statmount/statmount.h
++++ ltp-20250930/testcases/kernel/syscalls/statmount/statmount.h
+@@ -16,7 +16,7 @@
+ static inline int statmount(uint64_t mnt_id, uint64_t mask, struct statmount 
*buf,
+                    size_t bufsize, unsigned int flags)
+ {
+-      struct mnt_id_req req = {
++      mnt_id_req req = {
+               .size = MNT_ID_REQ_SIZE_VER0,
+               .mnt_id = mnt_id,
+               .param = mask,
diff --git a/meta/recipes-extended/ltp/ltp_20250930.bb 
b/meta/recipes-extended/ltp/ltp_20250930.bb
index 1514aca8fe0..30897de7ca0 100644
--- a/meta/recipes-extended/ltp/ltp_20250930.bb
+++ b/meta/recipes-extended/ltp/ltp_20250930.bb
@@ -29,7 +29,8 @@ SRCREV = "d2550ffbbcfe163212cd7e9c132db65ae0fa06ed"
 SRC_URI = 
"git://github.com/linux-test-project/ltp.git;branch=master;protocol=https \
            file://0001-Remove-OOM-tests-from-runtest-mm.patch \
            file://0001-Add-__clear_cache-declaration-for-clang.patch \
-           
file://0001-syscalls-semctl08-Skip-semctl08-when-__USE_TIME64_RE.patch \ 
+           
file://0001-syscalls-semctl08-Skip-semctl08-when-__USE_TIME64_RE.patch \
+           file://2d066ead3d6ef504c82551b12306e751d23ddb45.patch \
           "
 
 inherit autotools-brokensep pkgconfig
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