linux-kernel - [PATCH 0/5] random: Add PREEMPT

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Message-Id: <20211207121737.2347312-1-bigeasy@linutronix.de>
Date:   Tue,  7 Dec 2021 13:17:32 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Theodore Ts'o <tytso@....edu>,
        "Jason A . Donenfeld " <Jason@...c4.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 0/5] random: Add PREEMPT_RT support.

The entropy_store::lock can not be acquired with disabled interrupts on
PREEMPT_RT because it is a sleeping lock. The lock is acquired from
hard-irq context while the primary interrupt handler is invoked.
The series restructures the code a little so the lock is only acquired
in process context on PREEMPT_RT while it remains as-is for non-RT.

The first two patches remove unused arguments from functions. The
following two reshuffle the code a little while the last one addresses
the PREEMPT_RT related issue.

Sebastian