1#ifndef __ASM_SH_CMPXCHG_IRQ_H
 2#define __ASM_SH_CMPXCHG_IRQ_H
 3
 4#include <linux/irqflags.h>
 5
 6static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
 
 
 
 
 
 
 
 
 
 
 
 7{
 8	unsigned long flags, retval;
 9
10	local_irq_save(flags);
11	retval = *m;
12	*m = val;
13	local_irq_restore(flags);
14	return retval;
15}
16
17static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
18{
19	unsigned long flags, retval;
20
21	local_irq_save(flags);
22	retval = *m;
23	*m = val & 0xff;
24	local_irq_restore(flags);
25	return retval;
26}
27
28static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
29	unsigned long new)
30{
31	__u32 retval;
32	unsigned long flags;
33
34	local_irq_save(flags);
35	retval = *m;
36	if (retval == old)
37		*m = new;
38	local_irq_restore(flags);       /* implies memory barrier  */
39	return retval;
40}
41
42#endif /* __ASM_SH_CMPXCHG_IRQ_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_CMPXCHG_IRQ_H
 3#define __ASM_SH_CMPXCHG_IRQ_H
 4
 5#include <linux/irqflags.h>
 6
 7static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
 8{
 9	unsigned long flags, retval;
10
11	local_irq_save(flags);
12	retval = *m;
13	*m = val;
14	local_irq_restore(flags);
15	return retval;
16}
17
18static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val)
19{
20	unsigned long flags, retval;
21
22	local_irq_save(flags);
23	retval = *m;
24	*m = val;
25	local_irq_restore(flags);
26	return retval;
27}
28
29static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
30{
31	unsigned long flags, retval;
32
33	local_irq_save(flags);
34	retval = *m;
35	*m = val & 0xff;
36	local_irq_restore(flags);
37	return retval;
38}
39
40static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
41	unsigned long new)
42{
43	__u32 retval;
44	unsigned long flags;
45
46	local_irq_save(flags);
47	retval = *m;
48	if (retval == old)
49		*m = new;
50	local_irq_restore(flags);       /* implies memory barrier  */
51	return retval;
52}
53
54#endif /* __ASM_SH_CMPXCHG_IRQ_H */