[Outreachy kernel] [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Outreachy kernel] [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

It's better to use "list_for_each_entry_from_reverse" for iterating list
than "for loop" as it makes the code more clear to read.
This patch replace "for loop" with "list_for_each_entry_from_reverse"
and remove "cstate" variable as it is redundant in the code.

Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
index 81c3567..5e56f74 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
@@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 {
 	struct nvkm_device *device = clk->subdev.device;
 	struct nvkm_volt *volt = device->volt;
-	struct nvkm_cstate *cstate;
 	int max_volt;
 
 	if (!pstate || !start)
@@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 		max_volt = min(max_volt,
 			       nvkm_volt_map(volt, volt->max2_id, clk->temp));
 
-	for (cstate = start; &cstate->head != &pstate->list;
-	     cstate = list_prev_entry(cstate, head)) {
-		if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
+	list_for_each_entry_from_reverse(start, &pstate->list, head) {
+		if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
 			break;
 	}
 
-	return cstate;
+	return start;
 }
 
 static struct nvkm_cstate *
-- 
2.7.4

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[PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

It's better to use "list_for_each_entry_from_reverse" for iterating list
than "for loop" as it makes the code more clear to read.
This patch replace "for loop" with "list_for_each_entry_from_reverse"
and remove "cstate" variable as it is redundant in the code.

Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
index 81c3567..5e56f74 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
@@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 {
 	struct nvkm_device *device = clk->subdev.device;
 	struct nvkm_volt *volt = device->volt;
-	struct nvkm_cstate *cstate;
 	int max_volt;
 
 	if (!pstate || !start)
@@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 		max_volt = min(max_volt,
 			       nvkm_volt_map(volt, volt->max2_id, clk->temp));
 
-	for (cstate = start; &cstate->head != &pstate->list;
-	     cstate = list_prev_entry(cstate, head)) {
-		if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
+	list_for_each_entry_from_reverse(start, &pstate->list, head) {
+		if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
 			break;
 	}
 
-	return cstate;
+	return start;
 }
 
 static struct nvkm_cstate *
-- 
2.7.4

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[PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

It's better to use "list_for_each_entry_from_reverse" for iterating list
than "for loop" as it makes the code more clear to read.
This patch replace "for loop" with "list_for_each_entry_from_reverse"
and remove "cstate" variable as it is redundant in the code.

Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
index 81c3567..5e56f74 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
@@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 {
 	struct nvkm_device *device = clk->subdev.device;
 	struct nvkm_volt *volt = device->volt;
-	struct nvkm_cstate *cstate;
 	int max_volt;
 
 	if (!pstate || !start)
@@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 		max_volt = min(max_volt,
 			       nvkm_volt_map(volt, volt->max2_id, clk->temp));
 
-	for (cstate = start; &cstate->head != &pstate->list;
-	     cstate = list_prev_entry(cstate, head)) {
-		if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
+	list_for_each_entry_from_reverse(start, &pstate->list, head) {
+		if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
 			break;
 	}
 
-	return cstate;
+	return start;
 }
 
 static struct nvkm_cstate *
-- 
2.7.4

[Outreachy kernel] Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Ben Skeggs]

On 27 March 2018 at 19:11, Arushi Singhal
<arushisinghal19971997@gmail.com> wrote:
> It's better to use "list_for_each_entry_from_reverse" for iterating list
> than "for loop" as it makes the code more clear to read.
> This patch replace "for loop" with "list_for_each_entry_from_reverse"
> and remove "cstate" variable as it is redundant in the code.
I would prefer to also see "start" renamed to "cstate" with this change.

Ben.

>
> Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> ---
>  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> index 81c3567..5e56f74 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>  {
>         struct nvkm_device *device = clk->subdev.device;
>         struct nvkm_volt *volt = device->volt;
> -       struct nvkm_cstate *cstate;
>         int max_volt;
>
>         if (!pstate || !start)
> @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>                 max_volt = min(max_volt,
>                                nvkm_volt_map(volt, volt->max2_id, clk->temp));
>
> -       for (cstate = start; &cstate->head != &pstate->list;
> -            cstate = list_prev_entry(cstate, head)) {
> -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
>                         break;
>         }
>
> -       return cstate;
> +       return start;
>  }
>
>  static struct nvkm_cstate *
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Ben Skeggs]

On 27 March 2018 at 19:11, Arushi Singhal
<arushisinghal19971997@gmail.com> wrote:
> It's better to use "list_for_each_entry_from_reverse" for iterating list
> than "for loop" as it makes the code more clear to read.
> This patch replace "for loop" with "list_for_each_entry_from_reverse"
> and remove "cstate" variable as it is redundant in the code.
I would prefer to also see "start" renamed to "cstate" with this change.

Ben.

>
> Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> ---
>  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> index 81c3567..5e56f74 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>  {
>         struct nvkm_device *device = clk->subdev.device;
>         struct nvkm_volt *volt = device->volt;
> -       struct nvkm_cstate *cstate;
>         int max_volt;
>
>         if (!pstate || !start)
> @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>                 max_volt = min(max_volt,
>                                nvkm_volt_map(volt, volt->max2_id, clk->temp));
>
> -       for (cstate = start; &cstate->head != &pstate->list;
> -            cstate = list_prev_entry(cstate, head)) {
> -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
>                         break;
>         }
>
> -       return cstate;
> +       return start;
>  }
>
>  static struct nvkm_cstate *
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/nouveau

Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Ben Skeggs]

On 27 March 2018 at 19:11, Arushi Singhal
<arushisinghal19971997@gmail.com> wrote:
> It's better to use "list_for_each_entry_from_reverse" for iterating list
> than "for loop" as it makes the code more clear to read.
> This patch replace "for loop" with "list_for_each_entry_from_reverse"
> and remove "cstate" variable as it is redundant in the code.
I would prefer to also see "start" renamed to "cstate" with this change.

Ben.

>
> Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> ---
>  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> index 81c3567..5e56f74 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>  {
>         struct nvkm_device *device = clk->subdev.device;
>         struct nvkm_volt *volt = device->volt;
> -       struct nvkm_cstate *cstate;
>         int max_volt;
>
>         if (!pstate || !start)
> @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
>                 max_volt = min(max_volt,
>                                nvkm_volt_map(volt, volt->max2_id, clk->temp));
>
> -       for (cstate = start; &cstate->head != &pstate->list;
> -            cstate = list_prev_entry(cstate, head)) {
> -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
>                         break;
>         }
>
> -       return cstate;
> +       return start;
>  }
>
>  static struct nvkm_cstate *
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Outreachy kernel] Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

[-- Attachment #1: Type: text/plain, Size: 2896 bytes --]

On Tue, Mar 27, 2018 at 2:44 PM, Ben Skeggs <skeggsb@gmail.com> wrote:

> On 27 March 2018 at 19:11, Arushi Singhal
> <arushisinghal19971997@gmail.com> wrote:
> > It's better to use "list_for_each_entry_from_reverse" for iterating list
> > than "for loop" as it makes the code more clear to read.
> > This patch replace "for loop" with "list_for_each_entry_from_reverse"
> > and remove "cstate" variable as it is redundant in the code.
> I would prefer to also see "start" renamed to "cstate" with this change.
>
Hello Ben

Yes, using cstate is more accurate, as most of the functions are using
"cstate" variable.

Best
Arushi

>
> Ben.
>
> >
> > Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> > ---
> >  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > index 81c3567..5e56f74 100644
> > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >  {
> >         struct nvkm_device *device = clk->subdev.device;
> >         struct nvkm_volt *volt = device->volt;
> > -       struct nvkm_cstate *cstate;
> >         int max_volt;
> >
> >         if (!pstate || !start)
> > @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >                 max_volt = min(max_volt,
> >                                nvkm_volt_map(volt, volt->max2_id,
> clk->temp));
> >
> > -       for (cstate = start; &cstate->head != &pstate->list;
> > -            cstate = list_prev_entry(cstate, head)) {
> > -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> > +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> > +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
> >                         break;
> >         }
> >
> > -       return cstate;
> > +       return start;
> >  }
> >
> >  static struct nvkm_cstate *
> > --
> > 2.7.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

[-- Attachment #1.1: Type: text/plain, Size: 2479 bytes --]

On Tue, Mar 27, 2018 at 2:44 PM, Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> On 27 March 2018 at 19:11, Arushi Singhal
> <arushisinghal19971997-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > It's better to use "list_for_each_entry_from_reverse" for iterating list
> > than "for loop" as it makes the code more clear to read.
> > This patch replace "for loop" with "list_for_each_entry_from_reverse"
> > and remove "cstate" variable as it is redundant in the code.
> I would prefer to also see "start" renamed to "cstate" with this change.
>
Hello Ben

Yes, using cstate is more accurate, as most of the functions are using
"cstate" variable.

Best
Arushi

>
> Ben.
>
> >
> > Signed-off-by: Arushi Singhal <arushisinghal19971997-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > ---
> >  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > index 81c3567..5e56f74 100644
> > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >  {
> >         struct nvkm_device *device = clk->subdev.device;
> >         struct nvkm_volt *volt = device->volt;
> > -       struct nvkm_cstate *cstate;
> >         int max_volt;
> >
> >         if (!pstate || !start)
> > @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >                 max_volt = min(max_volt,
> >                                nvkm_volt_map(volt, volt->max2_id,
> clk->temp));
> >
> > -       for (cstate = start; &cstate->head != &pstate->list;
> > -            cstate = list_prev_entry(cstate, head)) {
> > -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> > +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> > +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
> >                         break;
> >         }
> >
> > -       return cstate;
> > +       return start;
> >  }
> >
> >  static struct nvkm_cstate *
> > --
> > 2.7.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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Re: [PATCH] gpu: drm: nouveau: Use list_for_each_entry_from_reverse

[Arushi Singhal]

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On Tue, Mar 27, 2018 at 2:44 PM, Ben Skeggs <skeggsb@gmail.com> wrote:

> On 27 March 2018 at 19:11, Arushi Singhal
> <arushisinghal19971997@gmail.com> wrote:
> > It's better to use "list_for_each_entry_from_reverse" for iterating list
> > than "for loop" as it makes the code more clear to read.
> > This patch replace "for loop" with "list_for_each_entry_from_reverse"
> > and remove "cstate" variable as it is redundant in the code.
> I would prefer to also see "start" renamed to "cstate" with this change.
>
Hello Ben

Yes, using cstate is more accurate, as most of the functions are using
"cstate" variable.

Best
Arushi

>
> Ben.
>
> >
> > Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
> > ---
> >  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > index 81c3567..5e56f74 100644
> > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > @@ -113,7 +113,6 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >  {
> >         struct nvkm_device *device = clk->subdev.device;
> >         struct nvkm_volt *volt = device->volt;
> > -       struct nvkm_cstate *cstate;
> >         int max_volt;
> >
> >         if (!pstate || !start)
> > @@ -133,13 +132,12 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct
> nvkm_pstate *pstate,
> >                 max_volt = min(max_volt,
> >                                nvkm_volt_map(volt, volt->max2_id,
> clk->temp));
> >
> > -       for (cstate = start; &cstate->head != &pstate->list;
> > -            cstate = list_prev_entry(cstate, head)) {
> > -               if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> > +       list_for_each_entry_from_reverse(start, &pstate->list, head) {
> > +               if (nvkm_cstate_valid(clk, start, max_volt, clk->temp))
> >                         break;
> >         }
> >
> > -       return cstate;
> > +       return start;
> >  }
> >
> >  static struct nvkm_cstate *
> > --
> > 2.7.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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