diff mbox series

[v2,2/2] dt-bindings: riscv: drop invalid comment about riscv,isa lower-case reasoning

Message ID tencent_85F69423082E524C478844E31D5F8920A506@qq.com
State New
Headers
Series [v2,1/2] riscv: allow case-insensitive ISA string parsing |

Commit Message

Yangyu Chen April 28, 2023, 2:16 p.m. UTC 
  From: Conor Dooley <conor.dooley@microchip.com>

"Ease of parsing" may have been the initial argument for keeping this
string in lower-case, but parsers may have been written that expect
lower-case only.
For example, the one in released kernels currently does not behave
correctly for multi-letter extensions that begin with a capital letter.
Allowing upper-case here brings about no benefit but would break
compatibility between new devicetrees and older kernels.

Drop the comment to avoid confusing people.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Conor Dooley April 28, 2023, 5:05 p.m. UTC | #1 
On Fri, Apr 28, 2023 at 10:16:01PM +0800, Yangyu Chen wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> "Ease of parsing" may have been the initial argument for keeping this
> string in lower-case, but parsers may have been written that expect
> lower-case only.
> For example, the one in released kernels currently does not behave
> correctly for multi-letter extensions that begin with a capital letter.
> Allowing upper-case here brings about no benefit but would break
> compatibility between new devicetrees and older kernels.
> 
> Drop the comment to avoid confusing people.
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

You missed an Acked-by from Rob here:
https://lore.kernel.org/all/168261158214.3107331.4410018416833510357.robh@kernel.org/

Also, when you are submitting a patch authored by another person, you
need to append your Signed-off-by to the patch ;)

Cheers,
Conor.


> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
> index 001931d526ec..1ee97621d0c7 100644
> --- a/Documentation/devicetree/bindings/riscv/cpus.yaml
> +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
> @@ -81,7 +81,7 @@ properties:
>  
>        While the isa strings in ISA specification are case
>        insensitive, letters in the riscv,isa string must be all
> -      lowercase to simplify parsing.
> +      lowercase.
>      $ref: "/schemas/types.yaml#/definitions/string"
>      pattern: ^rv(?:64|32)imaf?d?q?c?b?k?j?p?v?h?(?:[hsxz](?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$
>  
> -- 
> 2.40.0
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 001931d526ec..1ee97621d0c7 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -81,7 +81,7 @@  properties:
 
       While the isa strings in ISA specification are case
       insensitive, letters in the riscv,isa string must be all
-      lowercase to simplify parsing.
+      lowercase.
     $ref: "/schemas/types.yaml#/definitions/string"
     pattern: ^rv(?:64|32)imaf?d?q?c?b?k?j?p?v?h?(?:[hsxz](?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$