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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-09 21:42:09 +02:00
Thomas Weißschuh
7158fc54b2
The cache parameter of getcpu() is useless nowadays for various reasons. * It is never passed by userspace for either the vDSO or syscalls. * It is never used by the kernel. * It could not be made to work on the current vDSO architecture. * The structure definition is not part of the UAPI headers. * vdso_getcpu() is superseded by restartable sequences in any case. Remove the struct and its header. As a side-effect this gets rid of an unwanted inclusion of the linux/ header namespace from vDSO code. [ tglx: Adapt to s390 upstream changes */ Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Heiko Carstens <hca@linux.ibm.com> # s390 Link: https://patch.msgid.link/20251230-getcpu_cache-v3-1-fb9c5f880ebe@linutronix.de
26 lines
521 B
C
26 lines
521 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 ARM Ltd.
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*/
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#ifndef __ASM_VDSO_PROCESSOR_H
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#define __ASM_VDSO_PROCESSOR_H
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#ifndef __ASSEMBLER__
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/* PAUSE is a good thing to insert into busy-wait loops. */
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static __always_inline void native_pause(void)
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{
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asm volatile("pause" ::: "memory");
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}
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static __always_inline void cpu_relax(void)
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{
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native_pause();
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}
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notrace long __vdso_getcpu(unsigned *cpu, unsigned *node, void *unused);
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#endif /* __ASSEMBLER__ */
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#endif /* __ASM_VDSO_PROCESSOR_H */
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