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powerpc: Only define _TASK_CPU for 32-bit

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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>
Link: https://lore.kernel.org/r/20210418131641.1186227-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2021-04-18 23:16:41 +10:00
parent 39d0099f94
commit 3027a37c06
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/Makefile
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@ -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: