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Unverified Commit 9639a443 authored by Palmer Dabbelt's avatar Palmer Dabbelt
Browse files

RISC-V: Provide a cleaner raw_smp_processor_id() 



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

Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
[Atish: code comment formatting and other fixes]
Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent 6db170ff

arch/riscv/include/asm/smp.h

+4 −10
Original line number Diff line number Diff line
@@ -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 */