From: Daniel P. Berrangé Date: Tue, 10 Jun 2025 12:36:49 +0000 (+0100) Subject: hw/audio/marvell_88w8618: skip automatic zero-init of large array X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5b6cd5c5df4229972d8a0fd9dd9a089a1644d6ba;p=thirdparty%2Fqemu.git hw/audio/marvell_88w8618: skip automatic zero-init of large array 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 Reviewed-by: Stefan Hajnoczi Message-id: 20250610123709.835102-12-berrange@redhat.com [Fixed hw/audio/gus in commit message --Stefan] Signed-off-by: Stefan Hajnoczi --- diff --git a/hw/audio/marvell_88w8618.c b/hw/audio/marvell_88w8618.c index 6d3ebbb0c8..c5c79d083a 100644 --- a/hw/audio/marvell_88w8618.c +++ b/hw/audio/marvell_88w8618.c @@ -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;