* [Outreachy][PATCH] drm: use DIV_ROUND_UP helper macro for calculations
@ 2019-10-25 9:49 Wambui Karuga
2019-10-25 10:12 ` [Outreachy kernel] " Julia Lawall
0 siblings, 1 reply; 3+ messages in thread
From: Wambui Karuga @ 2019-10-25 9:49 UTC (permalink / raw)
To: dri-devel
Cc: maarten.lankhorst, mripard, sean, airlied, daniel, linux-kernel,
outreachy-kernel
Replace open coded divisor calculations with the DIV_ROUND_UP kernel
macro for better readability.
Issue found using coccinelle:
@@
expression n,d;
@@
(
- ((n + d - 1) / d)
+ DIV_ROUND_UP(n,d)
|
- ((n + (d - 1)) / d)
+ DIV_ROUND_UP(n,d)
)
Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
---
drivers/gpu/drm/drm_agpsupport.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index 6e09f27fd9d6..4c7ad46fdd21 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -212,7 +212,7 @@ int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
if (!entry)
return -ENOMEM;
- pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
+ pages = DIV_ROUND_UP(request->size, PAGE_SIZE);
type = (u32) request->type;
memory = agp_allocate_memory(dev->agp->bridge, pages, type);
if (!memory) {
@@ -325,7 +325,7 @@ int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
entry = drm_agp_lookup_entry(dev, request->handle);
if (!entry || entry->bound)
return -EINVAL;
- page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
+ page = DIV_ROUND_UP(request->offset, PAGE_SIZE);
retcode = drm_bind_agp(entry->memory, page);
if (retcode)
return retcode;
--
2.23.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Outreachy kernel] [Outreachy][PATCH] drm: use DIV_ROUND_UP helper macro for calculations
2019-10-25 9:49 [Outreachy][PATCH] drm: use DIV_ROUND_UP helper macro for calculations Wambui Karuga
@ 2019-10-25 10:12 ` Julia Lawall
2019-10-25 19:40 ` Daniel Vetter
0 siblings, 1 reply; 3+ messages in thread
From: Julia Lawall @ 2019-10-25 10:12 UTC (permalink / raw)
To: Wambui Karuga
Cc: dri-devel, maarten.lankhorst, mripard, sean, airlied, daniel,
linux-kernel, outreachy-kernel
On Fri, 25 Oct 2019, Wambui Karuga wrote:
> Replace open coded divisor calculations with the DIV_ROUND_UP kernel
> macro for better readability.
> Issue found using coccinelle:
> @@
> expression n,d;
> @@
> (
> - ((n + d - 1) / d)
> + DIV_ROUND_UP(n,d)
> |
> - ((n + (d - 1)) / d)
> + DIV_ROUND_UP(n,d)
> )
>
> Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
> ---
> drivers/gpu/drm/drm_agpsupport.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
> index 6e09f27fd9d6..4c7ad46fdd21 100644
> --- a/drivers/gpu/drm/drm_agpsupport.c
> +++ b/drivers/gpu/drm/drm_agpsupport.c
> @@ -212,7 +212,7 @@ int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
> if (!entry)
> return -ENOMEM;
>
> - pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
> + pages = DIV_ROUND_UP(request->size, PAGE_SIZE);
> type = (u32) request->type;
> memory = agp_allocate_memory(dev->agp->bridge, pages, type);
> if (!memory) {
> @@ -325,7 +325,7 @@ int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
> entry = drm_agp_lookup_entry(dev, request->handle);
> if (!entry || entry->bound)
> return -EINVAL;
> - page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
> + page = DIV_ROUND_UP(request->offset, PAGE_SIZE);
> retcode = drm_bind_agp(entry->memory, page);
> if (retcode)
> return retcode;
> --
> 2.23.0
>
> --
> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/20191025094907.3582-1-wambui.karugax%40gmail.com.
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Outreachy kernel] [Outreachy][PATCH] drm: use DIV_ROUND_UP helper macro for calculations
2019-10-25 10:12 ` [Outreachy kernel] " Julia Lawall
@ 2019-10-25 19:40 ` Daniel Vetter
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Vetter @ 2019-10-25 19:40 UTC (permalink / raw)
To: Julia Lawall
Cc: Wambui Karuga, dri-devel, maarten.lankhorst, mripard, sean,
airlied, daniel, linux-kernel, outreachy-kernel
On Fri, Oct 25, 2019 at 12:12:23PM +0200, Julia Lawall wrote:
>
>
> On Fri, 25 Oct 2019, Wambui Karuga wrote:
>
> > Replace open coded divisor calculations with the DIV_ROUND_UP kernel
> > macro for better readability.
> > Issue found using coccinelle:
> > @@
> > expression n,d;
> > @@
> > (
> > - ((n + d - 1) / d)
> > + DIV_ROUND_UP(n,d)
> > |
> > - ((n + (d - 1)) / d)
> > + DIV_ROUND_UP(n,d)
> > )
> >
> > Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
>
> Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Applied to drm-misc-next, thanks for your patch.
-Daniel
>
>
> > ---
> > drivers/gpu/drm/drm_agpsupport.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
> > index 6e09f27fd9d6..4c7ad46fdd21 100644
> > --- a/drivers/gpu/drm/drm_agpsupport.c
> > +++ b/drivers/gpu/drm/drm_agpsupport.c
> > @@ -212,7 +212,7 @@ int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
> > if (!entry)
> > return -ENOMEM;
> >
> > - pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
> > + pages = DIV_ROUND_UP(request->size, PAGE_SIZE);
> > type = (u32) request->type;
> > memory = agp_allocate_memory(dev->agp->bridge, pages, type);
> > if (!memory) {
> > @@ -325,7 +325,7 @@ int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
> > entry = drm_agp_lookup_entry(dev, request->handle);
> > if (!entry || entry->bound)
> > return -EINVAL;
> > - page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
> > + page = DIV_ROUND_UP(request->offset, PAGE_SIZE);
> > retcode = drm_bind_agp(entry->memory, page);
> > if (retcode)
> > return retcode;
> > --
> > 2.23.0
> >
> > --
> > You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@googlegroups.com.
> > To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/20191025094907.3582-1-wambui.karugax%40gmail.com.
> >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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2019-10-25 9:49 [Outreachy][PATCH] drm: use DIV_ROUND_UP helper macro for calculations Wambui Karuga
2019-10-25 10:12 ` [Outreachy kernel] " Julia Lawall
2019-10-25 19:40 ` Daniel Vetter
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