On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
> > So sg_phys() turns out to be 'page_to_phys(sg_page(s)) + s->offset',
> > which makes the above statement to:
> >
> > page_to_phys(sg_page(s)) + s->offset - s->offset;
> >
> > The compiler will probably optimize that away,
On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
So sg_phys() turns out to be 'page_to_phys(sg_page(s)) + s-offset',
which makes the above statement to:
page_to_phys(sg_page(s)) + s-offset - s-offset;
The compiler will probably optimize that away, but it still
On Wed, Jun 10, 2015 at 10:13 AM, Russell King - ARM Linux
wrote:
> On Wed, Jun 10, 2015 at 09:57:06AM -0700, Dan Williams wrote:
>> On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
>> wrote:
>> > Why? The aim of the code is not to detect whether the address is aligned
>> > to a page
On Wed, Jun 10, 2015 at 09:57:06AM -0700, Dan Williams wrote:
> On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
> wrote:
> > Why? The aim of the code is not to detect whether the address is aligned
> > to a page (if it were, it'd be testing for a zero s->offset, or it would
> > be
On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
wrote:
> On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
>> On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel wrote:
>> > On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
>> >> diff --git a/arch/arm/mm/dma-mapping.c
On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
> On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel wrote:
> > On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
> >> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> >> index 7e7583ddd607..9f6ff6671f01
On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel wrote:
> On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
>> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
>> index 7e7583ddd607..9f6ff6671f01 100644
>> --- a/arch/arm/mm/dma-mapping.c
>> +++
On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 7e7583ddd607..9f6ff6671f01 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -1502,7 +1502,7 @@ static int __map_sg_chunk(struct
On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7e7583ddd607..9f6ff6671f01 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1502,7 +1502,7 @@ static int __map_sg_chunk(struct
On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel j...@8bytes.org wrote:
On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7e7583ddd607..9f6ff6671f01 100644
--- a/arch/arm/mm/dma-mapping.c
+++
On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel j...@8bytes.org wrote:
On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index
On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Wed, Jun 10, 2015 at 09:00:31AM -0700, Dan Williams wrote:
On Wed, Jun 10, 2015 at 2:32 AM, Joerg Roedel j...@8bytes.org wrote:
On Tue, Jun 09, 2015 at 12:27:10PM -0400, Dan Williams wrote:
diff --git
On Wed, Jun 10, 2015 at 10:13 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Wed, Jun 10, 2015 at 09:57:06AM -0700, Dan Williams wrote:
On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
Why? The aim of the code is not to detect whether the
On Wed, Jun 10, 2015 at 09:57:06AM -0700, Dan Williams wrote:
On Wed, Jun 10, 2015 at 9:31 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
Why? The aim of the code is not to detect whether the address is aligned
to a page (if it were, it'd be testing for a zero s-offset, or it
> -Original Message-
> From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel-
> ow...@vger.kernel.org] On Behalf Of Dan Williams
> Sent: Tuesday, June 09, 2015 10:27 AM
> Subject: [PATCH 1/2] scatterlist: use sg_phys()
>
...
> diff --git a/arch/microblaz
Coccinelle cleanup to replace open coded sg to physical address
translations. This is in preparation for introducing scatterlists that
reference __pfn_t.
// sg_phys.cocci: convert usage page_to_phys(sg_page(sg)) to sg_phys(sg)
// usage: make coccicheck COCCI=sg_phys.cocci MODE=patch
virtual
Coccinelle cleanup to replace open coded sg to physical address
translations. This is in preparation for introducing scatterlists that
reference __pfn_t.
// sg_phys.cocci: convert usage page_to_phys(sg_page(sg)) to sg_phys(sg)
// usage: make coccicheck COCCI=sg_phys.cocci MODE=patch
virtual
-Original Message-
From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel-
ow...@vger.kernel.org] On Behalf Of Dan Williams
Sent: Tuesday, June 09, 2015 10:27 AM
Subject: [PATCH 1/2] scatterlist: use sg_phys()
...
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze
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