Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
s390/percpu: Get rid of ARCH_MODULE_NEEDS_WEAK_PER_CPU
Since the rework of the kernel virtual address space [1] the module area
and the kernel image are within the same 4GB area. Therefore there is no
need for the weak per cpu workaround for modules anymore. Remove it.
[1] commit c98d2ecae08f ("s390/mm: Uncouple physical vs virtual address spaces")
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
+1
-10
-1
arch/s390/Kconfig
-1
arch/s390/Kconfig
···
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select ARCH_INLINE_WRITE_UNLOCK_IRQ
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select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
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select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
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-
select ARCH_MODULE_NEEDS_WEAK_PER_CPU
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select ARCH_STACKWALK
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select ARCH_SUPPORTS_ATOMIC_RMW
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select ARCH_SUPPORTS_DEBUG_PAGEALLOC
-8
arch/s390/include/asm/percpu.h
-8
arch/s390/include/asm/percpu.h
···
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#define __my_cpu_offset get_lowcore()->percpu_offset
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/*
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* For 64 bit module code, the module may be more than 4G above the
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-
* per cpu area, use weak definitions to force the compiler to
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-
* generate external references.
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* Therefore, we have enabled CONFIG_ARCH_MODULE_NEEDS_WEAK_PER_CPU
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* in the Kconfig.
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-
*/
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-
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-
/*
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* We use a compare-and-swap loop since that uses less cpu cycles than
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* disabling and enabling interrupts like the generic variant would do.
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*/
+1
-1
include/linux/percpu-defs.h
+1
-1
include/linux/percpu-defs.h
···
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__section(".discard") __attribute__((unused))
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/*
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-
* s390 and alpha modules require percpu variables to be defined as
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+
* alpha modules require percpu variables to be defined as
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* weak to force the compiler to generate GOT based external
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* references for them. This is necessary because percpu sections
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* will be located outside of the usually addressable area.