[PATCH] landlock: Expand restrict flags example for ABI version 8

[Panagiotis "Ivory" Vasilopoulos]

Add LANDLOCK_RESTRICT_SELF_TSYNC to the backwards compatibility example
for restrict flags. This introduces completeness, similar to that of
the ruleset attributes example.

Additionally, I modified the two comments of the example to make them
more consistent with the ruleset attributes example's.

Signed-off-by: Panagiotis 'Ivory' Vasilopoulos <git@xxxxxxxxxxx>
---
 Documentation/userspace-api/landlock.rst | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Documentation/userspace-api/landlock.rst b/Documentation/userspace-api/landlock.rst
index 13134bccdd39d78ddce3daf454f32dda162ce91b..d972af20791a722d4665bd2ac287b05c5e97248c 100644
--- a/Documentation/userspace-api/landlock.rst
+++ b/Documentation/userspace-api/landlock.rst
@@ -197,12 +197,18 @@ similar backwards compatibility check is needed for the restrict flags
 
 .. code-block:: c
 
-    __u32 restrict_flags = LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON;
-    if (abi < 7) {
-        /* Clear logging flags unsupported before ABI 7. */
+    __u32 restrict_flags =
+        LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON |
+        LANDLOCK_RESTRICT_SELF_TSYNC;
+    switch (abi) {
+    case 1 ... 6:
+        /* Clear logging flags unsupported for ABI < 7 */
         restrict_flags &= ~(LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF |
                             LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON |
                             LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF);
+    case 7:
+        /* Removes multithread flag unsupported for ABI < 8 */
+    	restrict_flags &= ~LANDLOCK_RESTRICT_SELF_TSYNC;
     }
 
 The next step is to restrict the current thread from gaining more privileges

---
base-commit: ceb977bfe9e8715e6cd3a4785c7aab8ea5cd2b77
change-id: 20260221-landlock-docs-add-tsync-example-e8fd5c64a366

Best regards,
-- 
Panagiotis "Ivory" Vasilopoulos <git@xxxxxxxxxxx>