linux-kernel - [PATCH] ARM: Fix dtb dependency to use order-only prerequisites

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Date:	Mon, 24 Jun 2013 13:41:57 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Russell King <rmk+kernel@....linux.org.uk>,
	David Brown <davidb@...eaurora.org>
Cc:	Olof Johansson <olof@...om.net>,
	Mike Frysinger <vapier@...too.org>,
	Doug Anderson <dianders@...omium.org>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: Fix dtb dependency to use order-only prerequisites

The %.dtb dependency is specified to depend on the PHONY "scripts".
That means that it'll build every time even if the underlying dtb file
hasn't been touched.  Use an order-only prerequisites to fix this.
Also mark "dtbs" as PHONY for correctness.

This was broken in (70b0476 ARM: 7513/1: Make sure dtc is built before
running it).

Reported-by: Mike Frysinger <vapier@...too.org>
Signed-off-by: Doug Anderson <dianders@...omium.org>
---
 arch/arm/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1ba358b..fe8144e 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -289,9 +289,10 @@ zImage Image xipImage bootpImage uImage: vmlinux
 zinstall uinstall install: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
 
-%.dtb: scripts
+%.dtb: | scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@
 
+PHONY += dtbs
 dtbs: scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) dtbs
 
-- 
1.8.3

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