From f1d86b61fb6692c592e937dfb5069e4057855a3b Mon Sep 17 00:00:00 2001
From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Wed, 18 Sep 2013 17:21:34 +0200
Subject: [PATCH] s390/s390dbf: add debug_level_enabled() function
Add the debug_level_enabled() function to check if debug events for
a particular level would be logged. This might help to save cycles
for debug events that require additional information collection.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
Documentation/s390/s390dbf.txt | 10 ++++++++++
arch/s390/include/asm/debug.h | 5 +++++
2 files changed, 15 insertions(+)
diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt
index fcaf0b4efba21..3da163383c931 100644
--- a/Documentation/s390/s390dbf.txt
+++ b/Documentation/s390/s390dbf.txt
@@ -157,6 +157,16 @@ Return Value: none
Description: Sets new actual debug level if new_level is valid.
+---------------------------------------------------------------------------
+bool debug_level_enabled (debug_info_t * id, int level);
+
+Parameter: id: handle for debug log
+ level: debug level
+
+Return Value: True if level is less or equal to the current debug level.
+
+Description: Returns true if debug events for the specified level would be
+ logged. Otherwise returns false.
---------------------------------------------------------------------------
void debug_stop_all(void);
diff --git a/arch/s390/include/asm/debug.h b/arch/s390/include/asm/debug.h
index 188c5052a20ab..530c15eb01e99 100644
--- a/arch/s390/include/asm/debug.h
+++ b/arch/s390/include/asm/debug.h
@@ -107,6 +107,11 @@ void debug_set_level(debug_info_t* id, int new_level);
void debug_set_critical(void);
void debug_stop_all(void);
+static inline bool debug_level_enabled(debug_info_t* id, int level)
+{
+ return level <= id->level;
+}
+
static inline debug_entry_t*
debug_event(debug_info_t* id, int level, void* data, int length)
{
--
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