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54 lines
1.0 KiB
54 lines
1.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_SH_CMPXCHG_IRQ_H |
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#define __ASM_SH_CMPXCHG_IRQ_H |
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#include <linux/irqflags.h> |
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static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) |
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{ |
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unsigned long flags, retval; |
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local_irq_save(flags); |
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retval = *m; |
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*m = val; |
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local_irq_restore(flags); |
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return retval; |
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} |
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static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val) |
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{ |
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unsigned long flags, retval; |
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local_irq_save(flags); |
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retval = *m; |
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*m = val; |
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local_irq_restore(flags); |
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return retval; |
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} |
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static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
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{ |
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unsigned long flags, retval; |
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local_irq_save(flags); |
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retval = *m; |
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*m = val & 0xff; |
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local_irq_restore(flags); |
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return retval; |
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} |
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static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, |
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unsigned long new) |
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{ |
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__u32 retval; |
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unsigned long flags; |
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local_irq_save(flags); |
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retval = *m; |
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if (retval == old) |
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*m = new; |
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local_irq_restore(flags); /* implies memory barrier */ |
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return retval; |
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} |
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#endif /* __ASM_SH_CMPXCHG_IRQ_H */
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