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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2013-09-18 17:21:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-24 17:16:53 +0200 |
| commit | f1d86b61fb6692c592e937dfb5069e4057855a3b (patch) | |
| tree | ebf8feb3c5067a774492f9b52a87446e8d32853f | |
| parent | s390/bitops: optimize set_bit() for constant values (diff) | |
| download | linux-f1d86b61fb6692c592e937dfb5069e4057855a3b.tar.xz linux-f1d86b61fb6692c592e937dfb5069e4057855a3b.zip | |
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>
| -rw-r--r-- | Documentation/s390/s390dbf.txt | 10 | ||||
| -rw-r--r-- | arch/s390/include/asm/debug.h | 5 |
2 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt index fcaf0b4efba2..3da163383c93 100644 --- a/Documentation/s390/s390dbf.txt +++ b/Documentation/s390/s390dbf.txt @@ -158,6 +158,16 @@ 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); Parameter: none diff --git a/arch/s390/include/asm/debug.h b/arch/s390/include/asm/debug.h index 188c5052a20a..530c15eb01e9 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) { |