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authorIngo Molnar <mingo@elte.hu>2008-10-13 11:05:51 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-13 11:05:51 +0200
commitaccba5f3965d6a9d1bf7c1e1a7995d17e9d521b6 (patch)
tree8fb40782e79472ed882ff2098d4dd295557278ee /arch/sh/include/asm/cmpxchg-irq.h
parent6852fd9b86d05063c6ef49d2e12e061cc7f6a105 (diff)
parent4480f15b3306f43bbb0310d461142b4e897ca45b (diff)
Merge branch 'linus' into oprofile-v2
Conflicts: arch/x86/kernel/apic_32.c arch/x86/oprofile/nmi_int.c include/linux/pci_ids.h
Diffstat (limited to 'arch/sh/include/asm/cmpxchg-irq.h')
-rw-r--r--arch/sh/include/asm/cmpxchg-irq.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg-irq.h b/arch/sh/include/asm/cmpxchg-irq.h
new file mode 100644
index 00000000000..43049ec0554
--- /dev/null
+++ b/arch/sh/include/asm/cmpxchg-irq.h
@@ -0,0 +1,40 @@
+#ifndef __ASM_SH_CMPXCHG_IRQ_H
+#define __ASM_SH_CMPXCHG_IRQ_H
+
+static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
+{
+ unsigned long flags, retval;
+
+ local_irq_save(flags);
+ retval = *m;
+ *m = val;
+ local_irq_restore(flags);
+ return retval;
+}
+
+static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
+{
+ unsigned long flags, retval;
+
+ local_irq_save(flags);
+ retval = *m;
+ *m = val & 0xff;
+ local_irq_restore(flags);
+ return retval;
+}
+
+static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
+ unsigned long new)
+{
+ __u32 retval;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ retval = *m;
+ if (retval == old)
+ *m = new;
+ local_irq_restore(flags); /* implies memory barrier */
+ return retval;
+}
+
+#endif /* __ASM_SH_CMPXCHG_IRQ_H */