f5c54f77b0
Add a x86-specific cpumask_clear_cpu() helper which will be used in
places where the explicit KASAN-instrumentation in the *_bit() helpers
is unwanted.
Also, always inline two more cpumask generic helpers.
allyesconfig:
text data bss dec hex filename
190553143 159425889 32076404 382055436 16c5b40c vmlinux.before
190551812 159424945 32076404 382053161 16c5ab29 vmlinux.after
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20220204083015.17317-2-bp@alien8.de
44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_CPUMASK_H
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#define _ASM_X86_CPUMASK_H
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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extern cpumask_var_t cpu_callin_mask;
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extern cpumask_var_t cpu_callout_mask;
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extern cpumask_var_t cpu_initialized_mask;
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extern cpumask_var_t cpu_sibling_setup_mask;
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extern void setup_cpu_local_masks(void);
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/*
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* NMI and MCE exceptions need cpu_is_offline() _really_ early,
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* provide an arch_ special for them to avoid instrumentation.
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*/
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#if NR_CPUS > 1
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static __always_inline bool arch_cpu_online(int cpu)
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{
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return arch_test_bit(cpu, cpumask_bits(cpu_online_mask));
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}
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static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
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{
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arch_clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
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}
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#else
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static __always_inline bool arch_cpu_online(int cpu)
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{
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return cpu == 0;
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}
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static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
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{
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return;
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}
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#endif
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#define arch_cpu_is_offline(cpu) unlikely(!arch_cpu_online(cpu))
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_CPUMASK_H */
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