Re: [PATCH] Coccinelle: zalloc_simple: Fix patch mode for dma_alloc_coherent()

["Alex Dewar" <alex.dewar@gmx.co.uk>]

On Mon Apr 6, 2020 at 9:15 PM, Julia Lawall wrote:
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> On Fri, 3 Apr 2020, Alex Dewar wrote:
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> > Commit dfd32cad146e ("dma-mapping: remove dma_zalloc_coherent()"), in
> > removing dma_zalloc_coherent() treewide, inadvertently removed the patch
> > rule for dma_alloc_coherent(), leaving Coccinelle unable to auto-generate
> > patches for this case. Fix this.
> >
> > Fixes: dfd32cad146e ("dma-mapping: remove dma_zalloc_coherent()")
> > CC: Luis Chamberlain <mcgrof@kernel.org>
> > Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
> > ---
> >  scripts/coccinelle/api/alloc/zalloc-simple.cocci | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> >
> > diff --git a/scripts/coccinelle/api/alloc/zalloc-simple.cocci b/scripts/coccinelle/api/alloc/zalloc-simple.cocci
> > index 26cda3f48f01..c53aab7fe096 100644
> > --- a/scripts/coccinelle/api/alloc/zalloc-simple.cocci
> > +++ b/scripts/coccinelle/api/alloc/zalloc-simple.cocci
> > @@ -70,6 +70,15 @@ statement S;
> >  - x = (T)vmalloc(E1);
> >  + x = (T)vzalloc(E1);
> >  |
> > +- x = dma_alloc_coherent(E2,E1,E3,E4);
> > ++ x = dma_alloc_coherent(E2,E1,E3,E4);
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> 
> Hi,
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> I don't understand the above case. The before and after code seem to be
> the same?
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> 
> julia
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> > +|
> > +- x = (T *)dma_alloc_coherent(E2,E1,E3,E4);
> > ++ x = dma_alloc_coherent(E2,E1,E3,E4);
> > +|
> > +- x = (T)dma_alloc_coherent(E2,E1,E3,E4);
> > ++ x = (T)dma_alloc_coherent(E2,E1,E3,E4);
> > +|
> >  - x = kmalloc_node(E1,E2,E3);
> >  + x = kzalloc_node(E1,E2,E3);
> >  |
> > --
> > 2.26.0
> >
> >
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