linux-kernel - [PATCH 2/3] ARM: at91: move platform-specific asm-offset.h to arch/arm/mach-at91

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Date:   Mon,  8 Apr 2019 16:54:26 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     arm@...nel.org, Olof Johansson <olof@...om.net>,
        Arnd Bergmann <arnd@...db.de>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Russell King <linux@...linux.org.uk>
Subject: [PATCH 2/3] ARM: at91: move platform-specific asm-offset.h to arch/arm/mach-at91

<generated/at91_pm_data-offsets.h> is only generated and included
by arch/arm/mach-at91/, so it does not need to reside in the
globally visible include/generated/.

I moved and renamed it to arch/arm/mach-at91/pm_data-offsets.h
since the prefix 'at91_' is just redundant in mach-at91/.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

Can this be applied to ARM-SOC tree in a series?
(with Ack from the platform sub-maintainer.)

at91_pm_data-offsets.h header does not need to reside in
include/generated/, but you may ask
"Why must it get out of include/generated/?"

My main motivation is to avoid a race condition in the currently
proposed patch:

https://lore.kernel.org/patchwork/patch/1052763/

This patch tries to embed some build artifacts into the kernel.

If arch/arm/mach-at91/ and kernel/ are built at the same time,
it may embed a truncated file.


 arch/arm/mach-at91/.gitignore   | 1 +
 arch/arm/mach-at91/Makefile     | 5 +++--
 arch/arm/mach-at91/pm_suspend.S | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/mach-at91/.gitignore

diff --git a/arch/arm/mach-at91/.gitignore b/arch/arm/mach-at91/.gitignore
new file mode 100644
index 000000000000..2ecd6f51c8a9
--- /dev/null
+++ b/arch/arm/mach-at91/.gitignore
@@ -0,0 +1 @@
+pm_data-offsets.h
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 31b61f0e1c07..de64301dcff2 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -19,9 +19,10 @@ ifeq ($(CONFIG_PM_DEBUG),y)
 CFLAGS_pm.o += -DDEBUG
 endif
 
-include/generated/at91_pm_data-offsets.h: arch/arm/mach-at91/pm_data-offsets.s FORCE
+$(obj)/pm_data-offsets.h: $(obj)/pm_data-offsets.s FORCE
 	$(call filechk,offsets,__PM_DATA_OFFSETS_H__)
 
-arch/arm/mach-at91/pm_suspend.o: include/generated/at91_pm_data-offsets.h
+$(obj)/pm_suspend.o: $(obj)/pm_data-offsets.h
 
 targets += pm_data-offsets.s
+clean-files += pm_data-offsets.h
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index bfe1c4d06901..a31c1b20f3fa 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -14,7 +14,7 @@
 #include <linux/linkage.h>
 #include <linux/clk/at91_pmc.h>
 #include "pm.h"
-#include "generated/at91_pm_data-offsets.h"
+#include "pm_data-offsets.h"
 
 #define	SRAMC_SELF_FRESH_ACTIVE		0x01
 #define	SRAMC_SELF_FRESH_EXIT		0x00
-- 
2.17.1