linux-kernel - sparse errors in srcu.h

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Message-ID: <45769256.1070400@ens-lyon.org>
Date:	Wed, 06 Dec 2006 10:50:14 +0100
From:	Brice Goglin <Brice.Goglin@...-lyon.org>
To:	"Paul E. McKenney" <paulmck@...ibm.com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: sparse errors in srcu.h

Hi,

When running sparse checks on a file that ends up including srcu.h, we
get the following warnings:

    include/linux/srcu.h:52:44: error: undefined identifier 'sp'
    include/linux/srcu.h:52:44: error: bad constant expression
    include/linux/srcu.h:53:56: error: undefined identifier 'sp'
    include/linux/srcu.h:53:56: error: bad constant expression

It seems to be caused by the following lines:

    int srcu_read_lock(struct srcu_struct *sp) __acquires(sp);
    void srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp);

which come from the following commit.

    commit 621934ee7ed5b073c7fd638b347e632c53572761
    Author: Paul E. McKenney <paulmck@...ibm.com>
    Date:   Wed Oct 4 02:17:02 2006 -0700

    [PATCH] srcu-3: RCU variant permitting read-side blocking

I was wondering if there is a way to fix those errors...

Thanks,
Brice

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