* [PATCH] powerpc: Only define _TASK_CPU for 32-bit
@ 2021-04-18 13:16 Michael Ellerman
2021-04-21 13:08 ` Michael Ellerman
0 siblings, 1 reply; 2+ messages in thread
From: Michael Ellerman @ 2021-04-18 13:16 UTC (permalink / raw)
To: linuxppc-dev
We have some interesting code in our Makefile to define _TASK_CPU, based
on awk'ing the value out of asm-offsets.h. It exists to circumvent some
circular header dependencies that prevent us from referring to
task_struct in the relevant code. See the comment around _TASK_CPU in
smp.h for more detail.
Maybe one day we can come up with a better solution, but for now we can
at least limit that logic to 32-bit, because it's not needed for 64-bit.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Makefile | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 32dd693b4e42..3212d076ac6a 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -438,12 +438,15 @@ endif
endif
ifdef CONFIG_SMP
+ifdef CONFIG_PPC32
prepare: task_cpu_prepare
PHONY += task_cpu_prepare
task_cpu_prepare: prepare0
$(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
-endif
+
+endif # CONFIG_PPC32
+endif # CONFIG_SMP
PHONY += checkbin
# Check toolchain versions:
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] powerpc: Only define _TASK_CPU for 32-bit
2021-04-18 13:16 [PATCH] powerpc: Only define _TASK_CPU for 32-bit Michael Ellerman
@ 2021-04-21 13:08 ` Michael Ellerman
0 siblings, 0 replies; 2+ messages in thread
From: Michael Ellerman @ 2021-04-21 13:08 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev
On Sun, 18 Apr 2021 23:16:41 +1000, Michael Ellerman wrote:
> We have some interesting code in our Makefile to define _TASK_CPU, based
> on awk'ing the value out of asm-offsets.h. It exists to circumvent some
> circular header dependencies that prevent us from referring to
> task_struct in the relevant code. See the comment around _TASK_CPU in
> smp.h for more detail.
>
> Maybe one day we can come up with a better solution, but for now we can
> at least limit that logic to 32-bit, because it's not needed for 64-bit.
Applied to powerpc/next.
[1/1] powerpc: Only define _TASK_CPU for 32-bit
https://git.kernel.org/powerpc/c/3027a37c06be364e6443d3df3adf45576fba50cb
cheers
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