linux-kernel - [PATCH 0/9] Replace PREEMPT_RT ifdefs with preempt_[dis|en]able

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Date:   Wed, 17 Aug 2022 18:26:54 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>
Subject: [PATCH 0/9] Replace PREEMPT_RT ifdefs with preempt_[dis|en]able_nested().

Folks,

this is the follow up to the "vfs.git pile 3 - dcache" pull request [0].
It was concluded that the introduction of
	preempt_disable_nested()

in general makes sense and should be used in places where preemption on
!RT is disabled by other means and PREEMPT_RT need to explicitly disable
it.

This series introduces the macro and converts already existing users to
that macro. The u64_stat interface was simplified to make the change
simpler and code easier to follow.

[0] https://lore.kernel.org/all/YurA3aSb4GRr4wlW@ZenIV/

Sebastian