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    SubjectRe: sparse errors in srcu.h
    On Wed, Dec 06, 2006 at 10:50:14AM +0100, Brice Goglin wrote:
    > 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@us.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...

    I believe that you need to update your version of sparse to 0.1.
    See http://lwn.net/Articles/208312/ for more info.

    Thanx, Paul
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