Re: [PATCH v2 5/8] kernel: convert process/thread iterators to for_each_*_rculock
From: Peter Zijlstra <peterz@infradead.org>
Date: 2026-09-08 07:42:39
Also in:
linux-fsdevel, linux-mm, linux-pm, linux-security-module, lkml, rcu
On Mon, Sep 07, 2026 at 04:13:31PM +0800, Ye Liu wrote:
From: Ye Liu <liuye@kylinos.cn> Replace the manual rcu_read_lock()/rcu_read_unlock() and guard(rcu) pairs combined with for_each_process(), for_each_thread() and for_each_process_thread() loops across kernel/ with the for_each_*_rculock() macros, which scope the RCU read lock to the loop body via scoped_guard(rcu). No functional change. Signed-off-by: Ye Liu <liuye@kylinos.cn> Acked-by: Michal Hocko <mhocko@suse.com> --- Changes in v2: - Rename *_rcu to *_rculock - Rename stale 'unlock:' label to 'out:' in hung_task.c (Günther Noack) kernel/cpu.c | 4 +--- kernel/freezer.c | 4 +--- kernel/hung_task.c | 11 ++++------- kernel/locking/lockdep.c | 4 +--- kernel/rcu/update.c | 4 +--- kernel/sched/core.c | 3 +-- kernel/sched/debug.c | 4 +--- kernel/trace/fgraph.c | 8 ++------ kernel/unwind/deferred.c | 3 +-- 9 files changed, 13 insertions(+), 32 deletions(-)
This is not something that can be applied.