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

Message ID 1477769829-22230-9-git-send-email-Julia.Lawall@lip6.fr (mailing list archive)
State Accepted
Commit 8a7aef2cb3dafd2e8560750f4e5ad2cc2d9b1d17
Headers show

Commit Message

Julia Lawall Oct. 29, 2016, 7:37 p.m. UTC
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 <Julia.Lawall@lip6.fr>

---
 arch/powerpc/kernel/iommu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

Michael Ellerman Oct. 31, 2016, 6:06 a.m. UTC | #1
Julia Lawall <Julia.Lawall@lip6.fr> writes:

> diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
> index 5f202a5..32f18b5 100644
> --- a/arch/powerpc/kernel/iommu.c
> +++ b/arch/powerpc/kernel/iommu.c
> @@ -127,8 +127,7 @@ static ssize_t fail_iommu_store(struct device *dev,
>  	return count;
>  }
>  
> -static DEVICE_ATTR(fail_iommu, S_IRUGO|S_IWUSR, fail_iommu_show,
> -		   fail_iommu_store);
> +static DEVICE_ATTR_RW(fail_iommu);

Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)


cheers
Michael Ellerman Sept. 1, 2017, 1:29 p.m. UTC | #2
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 <Julia.Lawall@lip6.fr>
> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

Applied to powerpc next, thanks.

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

cheers
diff mbox

Patch

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 5f202a5..32f18b5 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -127,8 +127,7 @@  static ssize_t fail_iommu_store(struct device *dev,
 	return count;
 }
 
-static DEVICE_ATTR(fail_iommu, S_IRUGO|S_IWUSR, fail_iommu_show,
-		   fail_iommu_store);
+static DEVICE_ATTR_RW(fail_iommu);
 
 static int fail_iommu_bus_notify(struct notifier_block *nb,
 				 unsigned long action, void *data)