Thread (4 messages) 4 messages, 3 authors, 2017-09-01

Re: [08/15] powerpc/iommu: use permission-specific DEVICE_ATTR variants

From: Michael Ellerman <hidden>
Date: 2017-09-01 13:29:49
Also in: kernel-janitors, lkml

On Sat, 2016-10-29 at 19:37:02 UTC, Julia Lawall wrote:
Use DEVICE_ATTR_RW for read-write attributes.  This simplifies the
source code, improves readbility, and reduces the chance of
inconsistencies.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@rw@
declarer name DEVICE_ATTR;
identifier x,x_show,x_store;
@@

DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store);

@script:ocaml@
x << rw.x;
x_show << rw.x_show;
x_store << rw.x_store;
@@

if not (x^"_show" = x_show && x^"_store" = x_store)
then Coccilib.include_match false

@@
declarer name DEVICE_ATTR_RW;
identifier rw.x,rw.x_show,rw.x_store;
@@

- DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store);
+ DEVICE_ATTR_RW(x);
// </smpl>

Signed-off-by: Julia Lawall <redacted>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8a7aef2cb3dafd2e8560750f4e5ad2

cheers
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