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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b00742d399
Rather than using a single constant PERCPU_ENOUGH_ROOM, compute it as the sum of kernel_percpu + PERCPU_MODULE_RESERVE. This is now common to all architectures; if an architecture wants to set PERCPU_ENOUGH_ROOM to something special, then it may do so (ia64 is the only one which does). Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
#ifndef __ARCH_SPARC64_PERCPU__
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#define __ARCH_SPARC64_PERCPU__
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#include <linux/compiler.h>
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#ifdef CONFIG_SMP
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extern void setup_per_cpu_areas(void);
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extern unsigned long __per_cpu_base;
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extern unsigned long __per_cpu_shift;
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#define __per_cpu_offset(__cpu) \
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(__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
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#define per_cpu_offset(x) (__per_cpu_offset(x))
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/* Separate out the type, so (int[3], foo) works. */
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#define DEFINE_PER_CPU(type, name) \
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__attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
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register unsigned long __local_per_cpu_offset asm("g5");
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/* var is in discarded region: offset to particular copy we want */
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#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
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#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
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#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
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/* A macro to avoid #include hell... */
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#define percpu_modcopy(pcpudst, src, size) \
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do { \
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unsigned int __i; \
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for_each_possible_cpu(__i) \
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memcpy((pcpudst)+__per_cpu_offset(__i), \
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(src), (size)); \
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} while (0)
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#else /* ! SMP */
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#define DEFINE_PER_CPU(type, name) \
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__typeof__(type) per_cpu__##name
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#define per_cpu(var, cpu) (*((void)cpu, &per_cpu__##var))
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#define __get_cpu_var(var) per_cpu__##var
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#define __raw_get_cpu_var(var) per_cpu__##var
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#endif /* SMP */
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#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
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#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
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#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
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#endif /* __ARCH_SPARC64_PERCPU__ */
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