[RFC PATCH v4 10/19] dyndbg: avoid calling dyndbg_emit_prefix when it has no work

[Jim Cromie]

Wrap function in a static-inline one, which checks flags to avoid
calling the function unnecessarily.

Signed-off-by: Jim Cromie <jim.cro...@gmail.com>
---
 lib/dynamic_debug.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index af9cf97f869b..2d011ac3308d 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -615,7 +615,7 @@ static int remaining(int wrote)
        return 0;
 }
 
-static char *dynamic_emit_prefix(const struct _ddebug *dp, char *buf)
+static char *__dynamic_emit_prefix(const struct _ddebug *dp, char *buf)
 {
        int pos_after_tid;
        int pos = 0;
@@ -655,6 +655,13 @@ static char *dynamic_emit_prefix(const struct _ddebug *dp, 
char *buf)
        return buf;
 }
 
+static inline char *dynamic_emit_prefix(struct _ddebug *dp, char *buf)
+{
+       if (unlikely(dp->flags & _DPRINTK_FLAGS_INCL_ANY))
+               return __dynamic_emit_prefix(dp, buf);
+       return buf;
+}
+
 void __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
 {
        va_list args;
-- 
2.29.2