build kernel/profile.o only when requested
Build kernel/profile.o only if CONFIG_PROFILING is enabled.
This makes CONFIG_PROFILING=n kernels smaller.
As a bonus, some profile_tick() calls and one branch from schedule() are
now eliminated with CONFIG_PROFILING=n (but I doubt these are
measurable effects).
This patch changes the effects of CONFIG_PROFILING=n, but I don't think
having more than two choices would be the better choice.
This patch also adds the name of the first parameter to the prototypes
of profile_{hits,tick}() since I anyway had to add them for the dummy
functions.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/profile.h b/include/linux/profile.h
index 05c1cc7..4081fa3 100644
--- a/include/linux/profile.h
+++ b/include/linux/profile.h
@@ -8,8 +8,6 @@
#include <asm/errno.h>
-extern int prof_on __read_mostly;
-
#define CPU_PROFILING 1
#define SCHED_PROFILING 2
#define SLEEP_PROFILING 3
@@ -19,14 +17,29 @@
struct pt_regs;
struct notifier_block;
+#if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
+void create_prof_cpu_mask(struct proc_dir_entry *);
+#else
+#define create_prof_cpu_mask(x) do { (void)(x); } while (0)
+#endif
+
+enum profile_type {
+ PROFILE_TASK_EXIT,
+ PROFILE_MUNMAP
+};
+
+#ifdef CONFIG_PROFILING
+
+extern int prof_on __read_mostly;
+
/* init basic kernel profiler */
void __init profile_init(void);
-void profile_tick(int);
+void profile_tick(int type);
/*
* Add multiple profiler hits to a given address:
*/
-void profile_hits(int, void *ip, unsigned int nr_hits);
+void profile_hits(int type, void *ip, unsigned int nr_hits);
/*
* Single profiler hit:
@@ -40,19 +53,6 @@
profile_hits(type, ip, 1);
}
-#ifdef CONFIG_PROC_FS
-void create_prof_cpu_mask(struct proc_dir_entry *);
-#else
-#define create_prof_cpu_mask(x) do { (void)(x); } while (0)
-#endif
-
-enum profile_type {
- PROFILE_TASK_EXIT,
- PROFILE_MUNMAP
-};
-
-#ifdef CONFIG_PROFILING
-
struct task_struct;
struct mm_struct;
@@ -80,6 +80,28 @@
#else
+#define prof_on 0
+
+static inline void profile_init(void)
+{
+ return;
+}
+
+static inline void profile_tick(int type)
+{
+ return;
+}
+
+static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
+{
+ return;
+}
+
+static inline void profile_hit(int type, void *ip)
+{
+ return;
+}
+
static inline int task_handoff_register(struct notifier_block * n)
{
return -ENOSYS;