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| author | Christine Spang <christine.spang@oracle.com> | 2013-03-04 17:02:59 -0500 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-03-11 09:33:34 +0100 |
| commit | d5702162f85526319c848c667df49ee1754dccef (patch) | |
| tree | 15285b7b5a202a7f5629080fc3224a358378d0f1 /Documentation/DocBook | |
| parent | 8ba955cef30921417dffba901a8af5a2662a1dec (diff) | |
| download | linux-d5702162f85526319c848c667df49ee1754dccef.tar.gz linux-d5702162f85526319c848c667df49ee1754dccef.tar.bz2 linux-d5702162f85526319c848c667df49ee1754dccef.zip | |
ALSA: Make snd_BUG_ON() always evaluate and return the conditional expression
Having snd_BUG_ON() only evaluate its conditional when CONFIG_SND_DEBUG
is set leads to frequent bugs, since other similar macros in the kernel
have different behavior. Let's make snd_BUG_ON() act like those macros
so it will stop being accidentally misused.
Signed-off-by: Christine Spang <christine.spang@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/DocBook')
| -rw-r--r-- | Documentation/DocBook/writing-an-alsa-driver.tmpl | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl index bd6fee22c4dd..06741e925985 100644 --- a/Documentation/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl @@ -6164,14 +6164,12 @@ struct _snd_pcm_runtime { <para> The macro takes an conditional expression to evaluate. - When <constant>CONFIG_SND_DEBUG</constant>, is set, the - expression is actually evaluated. If it's non-zero, it shows - the warning message such as + When <constant>CONFIG_SND_DEBUG</constant>, is set, if the + expression is non-zero, it shows the warning message such as <computeroutput>BUG? (xxx)</computeroutput> - normally followed by stack trace. It returns the evaluated - value. - When no <constant>CONFIG_SND_DEBUG</constant> is set, this - macro always returns zero. + normally followed by stack trace. + + In both cases it returns the evaluated value. </para> </section> |