[PATCH V2] ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc

From	Nicholas Mc Guire <hofrat@osadl.org>
Newsgroups	linux.kernel
Subject	[PATCH V2] ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc
Date	2015-12-19 15:40 +0100
Message-ID	<qHqPT-4ns-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This is an API consolidation only. The use of kmalloc + memset to 0
is equivalent to kzalloc.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
---

V2: somehow managed to insert exactly the same line being removed
    so this time actually do the intended kmalloc->kzalloc replacement 

Found by coccinelle script (relaxed version of
scripts/coccinelle/api/alloc/kzalloc-simple.cocci)

Patch was compile tested with: x86_64_defconfig
CONFIG_SND_PCM_OSS=y

Patch is against linux-next (localversion-next is -next-20150518)

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index e557dbe..8cdd06f 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -851,7 +851,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 
 	if (mutex_lock_interruptible(&runtime->oss.params_lock))
 		return -EINTR;
-	sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
+	sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 	params = kmalloc(sizeof(*params), GFP_KERNEL);
 	sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 	if (!sw_params || !params || !sparams) {
@@ -989,7 +989,6 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 		goto failure;
 	}
 
-	memset(sw_params, 0, sizeof(*sw_params));
 	if (runtime->oss.trigger) {
 		sw_params->start_threshold = 1;
 	} else {
-- 
1.7.10.4

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[PATCH V2] ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc Nicholas Mc Guire <hofrat@osadl.org> - 2015-12-19 15:40 +0100
  Re: [PATCH V2] ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc Takashi Iwai <tiwai@suse.de> - 2015-12-20 22:40 +0100

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