[PATCH 1/7] trace: Move trace_seq_overflowed out of line

[Andi Kleen]

From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Inlining trace_seq_overflowed takes ~17k in text size in my kernel.
The function doesn't seem to be time critical, so we can just out of line it.

Function                                           Total          Avg   Num
trace_seq_has_overflowed                           17134 (0.00%)  33    514

This saves around 6k here

   text    data     bss     dec     hex filename
9102881 5367568 11116544        25586993        1866d31 vmlinux-orig
9096494 5367568 11116544        25580606        186543e vmlinux-trace-seq

Cc: rostedt@xxxxxxxxxxx
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
 include/linux/trace_seq.h | 12 +-----------
 kernel/trace/trace_seq.c  | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
index cfaf5a1d4bad..442e4f087b95 100644
--- a/include/linux/trace_seq.h
+++ b/include/linux/trace_seq.h
@@ -56,17 +56,7 @@ trace_seq_buffer_ptr(struct trace_seq *s)
 	return s->buffer + seq_buf_used(&s->seq);
 }
 
-/**
- * trace_seq_has_overflowed - return true if the trace_seq took too much
- * @s: trace sequence descriptor
- *
- * Returns true if too much data was added to the trace_seq and it is
- * now full and will not take anymore.
- */
-static inline bool trace_seq_has_overflowed(struct trace_seq *s)
-{
-	return s->full || seq_buf_has_overflowed(&s->seq);
-}
+bool trace_seq_has_overflowed(struct trace_seq *s);
 
 /*
  * Currently only defined when tracing is enabled.
diff --git a/kernel/trace/trace_seq.c b/kernel/trace/trace_seq.c
index e694c9f9efa4..4367cd43e38c 100644
--- a/kernel/trace/trace_seq.c
+++ b/kernel/trace/trace_seq.c
@@ -375,3 +375,18 @@ int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, int cnt)
 	return seq_buf_to_user(&s->seq, ubuf, cnt);
 }
 EXPORT_SYMBOL_GPL(trace_seq_to_user);
+
+
+
+/**
+ * trace_seq_has_overflowed - return true if the trace_seq took too much
+ * @s: trace sequence descriptor
+ *
+ * Returns true if too much data was added to the trace_seq and it is
+ * now full and will not take anymore.
+ */
+bool trace_seq_has_overflowed(struct trace_seq *s)
+{
+	return s->full || seq_buf_has_overflowed(&s->seq);
+}
+EXPORT_SYMBOL_GPL(trace_seq_has_overflowed);
-- 
2.9.3