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hw/audio/marvell_88w8618: skip automatic zero-init of large array

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The 'mv88w8618_audio_callback' method has a 4k byte array used for
copying data between the audio backend and device. Skip the automatic
zero-init of this array to eliminate the performance overhead in
the I/O hot path.

The 'buf' array will be fully initialized when reading data from
device memory.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-12-berrange@redhat.com
[Fixed hw/audio/gus in commit message --Stefan]
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2025-06-10 13:36:49 +01:00 • committed by Stefan Hajnoczi
parent 2e438da492
commit 5b6cd5c5df
1 changed files with 1 additions and 1 deletions
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2
hw/audio/marvell_88w8618.c
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@ -66,7 +66,7 @@ static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
{
mv88w8618_audio_state *s = opaque;
int16_t *codec_buffer;
int8_t buf[4096];
QEMU_UNINITIALIZED int8_t buf[4096];
int8_t *mem_buffer;
int pos, block_size;