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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:36:51 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:40:15 -0400 |
| commit | bb71d9fe1419f44529c91d1b09464718d157e647 (patch) | |
| tree | 49c39a8ad67aef31caa4ba92440735967e7993a1 | |
| parent | 30c82f6657c1ee9fbb5473924b4d3273f214bd6f (diff) | |
| download | qemu-bb71d9fe1419f44529c91d1b09464718d157e647.zip qemu-bb71d9fe1419f44529c91d1b09464718d157e647.tar.gz qemu-bb71d9fe1419f44529c91d1b09464718d157e647.tar.bz2 | |
hw/audio/via-ac97: skip automatic zero-init of large array
The 'out_cb' 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 'tmpbuf' 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: 20250610123709.835102-14-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/audio/via-ac97.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/audio/via-ac97.c b/hw/audio/via-ac97.c index 1e0a5c7..d5231e1 100644 --- a/hw/audio/via-ac97.c +++ b/hw/audio/via-ac97.c @@ -175,7 +175,7 @@ static void out_cb(void *opaque, int avail) ViaAC97SGDChannel *c = &s->aur; int temp, to_copy, copied; bool stop = false; - uint8_t tmpbuf[4096]; + QEMU_UNINITIALIZED uint8_t tmpbuf[4096]; if (c->stat & STAT_PAUSED) { return; |