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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/ia64/include/asm/percpu.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/ia64/include/asm/percpu.h')
-rw-r--r-- | arch/ia64/include/asm/percpu.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/percpu.h b/arch/ia64/include/asm/percpu.h new file mode 100644 index 000000000..f357b9bb3 --- /dev/null +++ b/arch/ia64/include/asm/percpu.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_IA64_PERCPU_H +#define _ASM_IA64_PERCPU_H + +/* + * Copyright (C) 2002-2003 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + */ + +#ifdef __ASSEMBLY__ +# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */ +#else /* !__ASSEMBLY__ */ + + +#include <linux/threads.h> + +#ifdef CONFIG_SMP + +#ifdef HAVE_MODEL_SMALL_ATTRIBUTE +# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) +#endif + +#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset) + +extern void *per_cpu_init(void); + +#else /* ! SMP */ + +#define per_cpu_init() (__phys_per_cpu_start) + +#endif /* SMP */ + +#define PER_CPU_BASE_SECTION ".data..percpu" + +/* + * Be extremely careful when taking the address of this variable! Due to virtual + * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)! + * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly + * more efficient. + */ +#define __ia64_per_cpu_var(var) (*({ \ + __verify_pcpu_ptr(&(var)); \ + ((typeof(var) __kernel __force *)&(var)); \ +})) + +#include <asm-generic/percpu.h> + +/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ +DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASM_IA64_PERCPU_H */ |