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tracing: use union for multi-usages field

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Impact: cleanup

struct dyn_ftrace::ip has different usages in his lifecycle,
we use union for it. And also for struct dyn_ftrace::flags.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <49C871BE.3080405@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2009-03-24 13:38:06 +08:00 • committed by Ingo Molnar
parent cc59c9e8d0
commit ee000b7f9f
2 changed files with 13 additions and 7 deletions
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12
include/linux/ftrace.h
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@ -145,9 +145,15 @@ enum {
};
struct dyn_ftrace {
unsigned long ip; /* address of mcount call-site */
unsigned long flags;
struct dyn_arch_ftrace arch;
union {
unsigned long ip; /* address of mcount call-site */
struct dyn_ftrace *freelist;
};
union {
unsigned long flags;
struct dyn_ftrace *newlist;
};
struct dyn_arch_ftrace arch;
};
int ftrace_force_update(void);