linux-kernel - [PATCH 5.6 006/106] kbuild: fix DT binding schema rule again to avoid needless rebuilds

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Date:   Fri,  1 May 2020 15:22:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH 5.6 006/106] kbuild: fix DT binding schema rule again to avoid needless rebuilds

From: Masahiro Yamada <masahiroy@...nel.org>

commit 3d4b2238684ac919394eba7fb51bb7eeeec6ab57 upstream.

Since commit 7a0496056064 ("kbuild: fix DT binding schema rule to detect
command line changes"), this rule is every time re-run even if you change
nothing.

cmd_dtc takes one additional parameter to pass to the -O option of dtc.

We need to pass 'yaml' to if_changed_rule. Otherwise, cmd-check invoked
from if_changed_rule is false positive.

Fixes: 7a0496056064 ("kbuild: fix DT binding schema rule to detect command line changes")
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 scripts/Makefile.lib |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -308,7 +308,7 @@ define rule_dtc
 endef
 
 $(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
-	$(call if_changed_rule,dtc)
+	$(call if_changed_rule,dtc,yaml)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)