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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 <>
> 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 for more info.

Thanx, Paul
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