]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6006c0d8 JH |
2 | #ifndef __ASM_METAG_CMPXCHG_IRQ_H |
3 | #define __ASM_METAG_CMPXCHG_IRQ_H | |
4 | ||
5 | #include <linux/irqflags.h> | |
6 | ||
7 | static 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 | ||
18 | static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) | |
19 | { | |
20 | unsigned long flags, retval; | |
21 | ||
22 | local_irq_save(flags); | |
23 | retval = *m; | |
24 | *m = val & 0xff; | |
25 | local_irq_restore(flags); | |
26 | return retval; | |
27 | } | |
28 | ||
29 | static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, | |
30 | unsigned long new) | |
31 | { | |
32 | __u32 retval; | |
33 | unsigned long flags; | |
34 | ||
35 | local_irq_save(flags); | |
36 | retval = *m; | |
37 | if (retval == old) | |
38 | *m = new; | |
39 | local_irq_restore(flags); /* implies memory barrier */ | |
40 | return retval; | |
41 | } | |
42 | ||
43 | #endif /* __ASM_METAG_CMPXCHG_IRQ_H */ |