Re: [PATCH v3 2/8] lib/vsprintf: Use acquire/release for ptr_key publication

[Petr Mladek]

On Wed 2026-09-02 15:47:59, Jinjie Ruan wrote:
> Replace the smp_wmb() + WRITE_ONCE() and READ_ONCE() + smp_rmb() barrier
> pair with smp_store_release()/smp_load_acquire() on filled_random_ptr_key.
> 
> This expresses the publish/subscribe pattern more clearly and allows
> architectures with native acquire/release instructions (e.g. arm64's
> STLR/LDAR) to avoid the cost of full one-way barriers (DMB ISHST/ISHLD).
> 
> No functional change intended.
> 
> Cc: Petr Mladek <pmladek@xxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
> Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Assisted-by: DeepSeek:DeepSeek-V3
> Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>

JFYI, this patch has been committed into printk/linux.git,
branch for-7.3.

Best Regards,
Petr