linux-kernel - [PATCH 1/2] dt-bindings: Parallelize yamllint

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Message-Id: <c68bdbdf3112c4658e0748c8fc51959e69fbae2e.1634551582.git.geert+renesas@glider.be>
Date:   Mon, 18 Oct 2021 12:54:47 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Stephen Boyd <sboyd@...nel.org>, Joey Gouly <joey.gouly@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 1/2] dt-bindings: Parallelize yamllint

Use xargs sharding like "chk_bindings" does, to parallelize the
execution of yamllint.

This reduces the yamllint execution time from ca. 21 to 5 seconds on
i7-8700K.

Suggested-by: Rob Herring <robh+dt@...nel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v2:
  - New.
---
 Documentation/devicetree/bindings/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
index a072e95de626c83b..6305cfa9495ed676 100644
--- a/Documentation/devicetree/bindings/Makefile
+++ b/Documentation/devicetree/bindings/Makefile
@@ -28,7 +28,7 @@ find_cmd = find $(srctree)/$(src) \( -name '*.yaml' ! \
 
 quiet_cmd_yamllint = LINT    $(src)
       cmd_yamllint = ($(find_cmd) | \
-                     xargs $(DT_SCHEMA_LINT) -f parsable -c $(srctree)/$(src)/.yamllint >&2) || true
+                     xargs -n200 -P$$(nproc) $(DT_SCHEMA_LINT) -f parsable -c $(srctree)/$(src)/.yamllint >&2) || true
 
 quiet_cmd_chk_bindings = CHKDT   $@
       cmd_chk_bindings = ($(find_cmd) | \
-- 
2.25.1