linux-kernel - Re: cocci script to convert linux-kernel allocs with BITS_TO_LONGS to bitmap

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Date:   Tue, 13 Jul 2021 16:09:22 -0700
From:   Joe Perches <joe@...ches.com>
To:     Julia Lawall <julia.lawall@...ia.fr>
Cc:     cocci <cocci@...teme.lip6.fr>, LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: cocci script to convert linux-kernel allocs with BITS_TO_LONGS
 to bitmap_alloc

On Tue, 2021-07-13 at 23:33 +0200, Julia Lawall wrote:
> > > On Fri, 9 Jul 2021, Joe Perches wrote:
> > > > Here is a cocci script to convert various types of bitmap allocations
> > > > that use BITS_TO_LONGS to the more typical bitmap_alloc functions.
> 
> I see that there is also a bitmap_free.  Maybe the rule should be
> introducing that as well?

Yes, but as far as I know, it's difficult for coccinelle to convert
the kfree() calls of any previous bitmap_alloc to bitmap_free as
most frequently the kfree() call is in a separate function.

Please do it if you know how, you're probably the best in the world
at coccinelle.  I don't know how...

cheers, Joe