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v0.8.1
https://github.com/torvalds/linux
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Tip revision: 14ccee78fc82f5512908f4424f541549a5705b89 authored by Linus Torvalds on 20 August 2017, 21:13:52 UTC
Linux 4.13-rc6
Tip revision: 14ccee7
futex-irq.h
#ifndef __ASM_SH_FUTEX_IRQ_H
#define __ASM_SH_FUTEX_IRQ_H

static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
						   u32 __user *uaddr,
						   u32 oldval, u32 newval)
{
	unsigned long flags;
	int ret;
	u32 prev = 0;

	local_irq_save(flags);

	ret = get_user(prev, uaddr);
	if (!ret && oldval == prev)
		ret = put_user(newval, uaddr);

	local_irq_restore(flags);

	*uval = prev;
	return ret;
}

#endif /* __ASM_SH_FUTEX_IRQ_H */
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