linux-kernel - [PATCH v2 0/1] local_lock: Move this_cpu_ptr() notation from internal to main header

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250610110205.1111719-1-bigeasy@linutronix.de>
Date: Tue, 10 Jun 2025 13:02:03 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: linux-kernel@...r.kernel.org,
	linux-rt-devel@...ts.linux.dev
Cc: tglx@...utronix.de,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Alexei Starovoitov <alexei.starovoitov@...il.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH v2 0/1] local_lock: Move this_cpu_ptr() notation from internal to main header

While looking at what needs extra locks for PREEMPT_RT in order to rid
of the lock in local_bh_disable() I stumbled uppon two users which need
to lock the structure but the pointer is no longer per_cpu.

The moves this_cpu_ptr() from the internal header to the main one in order to
free the name space and have the __ prefix function to do the same but without
the this_cpu_ptr(). This gives us
    local_lock_nested_bh() -> on per-CPU memory
  __local_lock_nested_bh() -> on local memory.

This change has been made to all local_lock*() functions.

I made an example for the crypto user
	https://lore.kernel.org/all/20250514110750.852919-3-bigeasy@linutronix.de/

and would route if via crypto once this is accepted.

v1…v2: https://lore.kernel.org/all/20250514110750.852919-1-bigeasy@linutronix.de/
   - Repost without the crypto user.

Sebastian Andrzej Siewior (1):
  local_lock: Move this_cpu_ptr() notation from internal to main header.

 include/linux/local_lock.h          | 20 +++++++++----------
 include/linux/local_lock_internal.h | 30 ++++++++++++++---------------
 2 files changed, 25 insertions(+), 25 deletions(-)

-- 
2.49.0