tools/arch/riscv/include/asm/barrier.h

Source file repositories/reference/linux-study-clean/tools/arch/riscv/include/asm/barrier.h

File Facts

System
Linux kernel
Corpus path
tools/arch/riscv/include/asm/barrier.h
Extension
.h
Size
1043 bytes
Lines
40
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _TOOLS_LINUX_ASM_RISCV_BARRIER_H
#define _TOOLS_LINUX_ASM_RISCV_BARRIER_H

#include <asm/fence.h>
#include <linux/compiler.h>

/* These barriers need to enforce ordering on both devices and memory. */
#define mb()		RISCV_FENCE(iorw, iorw)
#define rmb()		RISCV_FENCE(ir, ir)
#define wmb()		RISCV_FENCE(ow, ow)

/* These barriers do not need to enforce ordering on devices, just memory. */
#define smp_mb()	RISCV_FENCE(rw, rw)
#define smp_rmb()	RISCV_FENCE(r, r)
#define smp_wmb()	RISCV_FENCE(w, w)

#define smp_store_release(p, v)						\
do {									\
	RISCV_FENCE(rw, w);						\
	WRITE_ONCE(*p, v);						\
} while (0)

#define smp_load_acquire(p)						\
({									\
	typeof(*p) ___p1 = READ_ONCE(*p);				\
	RISCV_FENCE(r, rw);						\
	___p1;								\
})

#endif /* _TOOLS_LINUX_ASM_RISCV_BARRIER_H */

Annotation

Implementation Notes