powerpc/pseries: Re-enable dispatch trace log userspace interface

[linux-2.6-block.git] / arch / powerpc / include / asm / lppaca.h

diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index cfb85ec85750e86025e0315aaf4dd7edb00044f1..7f5e0fefebb0f14d5a8456ef8098a16107f70208 100644 (file)
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -191,6 +191,14 @@ struct dtl_entry {
 #define DISPATCH_LOG_BYTES     4096    /* bytes per cpu */
 #define N_DISPATCH_LOG         (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
 
+/*
+ * When CONFIG_VIRT_CPU_ACCOUNTING = y, the cpu accounting code controls
+ * reading from the dispatch trace log.  If other code wants to consume
+ * DTL entries, it can set this pointer to a function that will get
+ * called once for each DTL entry that gets processed.
+ */
+extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index);
+
 #endif /* CONFIG_PPC_BOOK3S */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_LPPACA_H */