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RISC-V: Provide a cleaner raw_smp_processor_id()

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I'm not sure how I managed to miss this the first time, but this is much
better.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
[Atish: code comment formatting and other fixes]
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Palmer Dabbelt 2018-10-02 12:14:59 -07:00
parent 6db170ff4c
commit 9639a44394
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1 changed files with 4 additions and 10 deletions
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14
arch/riscv/include/asm/smp.h
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@ -14,13 +14,9 @@
#ifndef _ASM_RISCV_SMP_H
#define _ASM_RISCV_SMP_H
/* This both needs asm-offsets.h and is used when generating it. */
#ifndef GENERATING_ASM_OFFSETS
#include <asm/asm-offsets.h>
#endif
#include <linux/cpumask.h>
#include <linux/irqreturn.h>
#include <linux/thread_info.h>
#ifdef CONFIG_SMP
@ -34,12 +30,10 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask);
void arch_send_call_function_single_ipi(int cpu);
/*
* This is particularly ugly: it appears we can't actually get the definition
* of task_struct here, but we need access to the CPU this task is running on.
* Instead of using C we're using asm-offsets.h to get the current processor
* ID.
* Obtains the hart ID of the currently executing task. This relies on
* THREAD_INFO_IN_TASK, but we define that unconditionally.
*/
#define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU)))
#define raw_smp_processor_id() (current_thread_info()->cpu)
#endif /* CONFIG_SMP */