Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves
   disk space by teaching ocfs2 to reclaim suballocator block group
   space (Heming Zhao)

 - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the
   ARRAY_END() macro and uses it in various places (Alejandro Colomar)

 - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes
   the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the
   page size (Pnina Feder)

 - "kallsyms: Prevent invalid access when showing module buildid" cleans
   up kallsyms code related to module buildid and fixes an invalid
   access crash when printing backtraces (Petr Mladek)

 - "Address page fault in ima_restore_measurement_list()" fixes a
   kexec-related crash that can occur when booting the second-stage
   kernel on x86 (Harshit Mogalapalli)

 - "kho: ABI headers and Documentation updates" updates the kexec
   handover ABI documentation (Mike Rapoport)

 - "Align atomic storage" adds the __aligned attribute to atomic_t and
   atomic64_t definitions to get natural alignment of both types on
   csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain)

 - "kho: clean up page initialization logic" simplifies the page
   initialization logic in kho_restore_page() (Pratyush Yadav)

 - "Unload linux/kernel.h" moves several things out of kernel.h and into
   more appropriate places (Yury Norov)

 - "don't abuse task_struct.group_leader" removes the usage of
   ->group_leader when it is "obviously unnecessary" (Oleg Nesterov)

 - "list private v2 & luo flb" adds some infrastructure improvements to
   the live update orchestrator (Pasha Tatashin)

* tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits)
  watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency
  procfs: fix missing RCU protection when reading real_parent in do_task_stat()
  watchdog/softlockup: fix sample ring index wrap in need_counting_irqs()
  kcsan, compiler_types: avoid duplicate type issues in BPF Type Format
  kho: fix doc for kho_restore_pages()
  tests/liveupdate: add in-kernel liveupdate test
  liveupdate: luo_flb: introduce File-Lifecycle-Bound global state
  liveupdate: luo_file: Use private list
  list: add kunit test for private list primitives
  list: add primitives for private list manipulations
  delayacct: fix uapi timespec64 definition
  panic: add panic_force_cpu= parameter to redirect panic to a specific CPU
  netclassid: use thread_group_leader(p) in update_classid_task()
  RDMA/umem: don't abuse current->group_leader
  drm/pan*: don't abuse current->group_leader
  drm/amd: kill the outdated "Only the pthreads threading model is supported" checks
  drm/amdgpu: don't abuse current->group_leader
  android/binder: use same_thread_group(proc->tsk, current) in binder_mmap()
  android/binder: don't abuse current->group_leader
  kho: skip memoryless NUMA nodes when reserving scratch areas
  ...

1 files changed, 12 insertions, 12 deletions

diff --git a/rust/kernel/task.rs b/rust/kernel/task.rs
index 49fad6de0674..cc907fb531bc 100644
--- a/rust/kernel/task.rs
+++ b/rust/kernel/task.rs
@@ -204,18 +204,6 @@ impl Task {
         self.0.get()
     }
 
-    /// Returns the group leader of the given task.
-    pub fn group_leader(&self) -> &Task {
-        // SAFETY: The group leader of a task never changes after initialization, so reading this
-        // field is not a data race.
-        let ptr = unsafe { *ptr::addr_of!((*self.as_ptr()).group_leader) };
-
-        // SAFETY: The lifetime of the returned task reference is tied to the lifetime of `self`,
-        // and given that a task has a reference to its group leader, we know it must be valid for
-        // the lifetime of the returned task reference.
-        unsafe { &*ptr.cast() }
-    }
-
     /// Returns the PID of the given task.
     pub fn pid(&self) -> Pid {
         // SAFETY: The pid of a task never changes after initialization, so reading this field is
@@ -345,6 +333,18 @@ impl CurrentTask {
         // `release_task()` call.
         Some(unsafe { PidNamespace::from_ptr(active_ns) })
     }
+
+    /// Returns the group leader of the current task.
+    pub fn group_leader(&self) -> &Task {
+        // SAFETY: The group leader of a task never changes while the task is running, and `self`
+        // is the current task, which is guaranteed running.
+        let ptr = unsafe { (*self.as_ptr()).group_leader };
+
+        // SAFETY: `current->group_leader` stays valid for at least the duration in which `current`
+        // is running, and the signature of this function ensures that the returned `&Task` can
+        // only be used while `current` is still valid, thus still running.
+        unsafe { &*ptr.cast() }
+    }
 }
 
 // SAFETY: The type invariants guarantee that `Task` is always refcounted.