From: Masahiro Yamada yamada.masahiro@socionext.com
[ Upstream commit 9fac85a6db8999922f2cd92dfe2e83e063b31a94 ]
<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 renamed it to arch/arm/mach-at91/pm_data-offsets.h since the prefix 'at91_' is just redundant in mach-at91/.
My main motivation of this change is to avoid the race condition for the parallel build (-j) when CONFIG_IKHEADERS is enabled.
When it is enabled, all the headers under include/ are archived into kernel/kheaders_data.tar.xz and exposed in the sysfs.
In the parallel build, we have no idea in which order files are built.
- If at91_pm_data-offsets.h is built before kheaders_data.tar.xz, the header will be included in the archive. Probably nobody will use it, but it is harmless except that it will increase the archive size needlessly.
- If kheaders_data.tar.xz is built before at91_pm_data-offsets.h, the header will not be included in the archive. However, in the next build, the archive will be re-generated to include the newly-found at91_pm_data-offsets.h. This is not nice from the build system point of view.
- If at91_pm_data-offsets.h and kheaders_data.tar.xz are built at the same time, the corrupted header might be included in the archive, which does not look nice either.
This commit fixes the race.
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com Link: https://lore.kernel.org/r/20190823024346.591-1-yamada.masahiro@socionext.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 0000000000000..2ecd6f51c8a95 --- /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 31b61f0e1c077..de64301dcff25 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 c751f047b1166..ed57c879d4e17 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -10,7 +10,7 @@ #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