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ALSA: drivers: Mark some variables as __ro_after_init

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Some variables in the 'ALSA/drivers' are initialized only during the
init phase in the '__init' functions and never changed. So, mark them
as __ro_after_init to reduce the attack surface.

Signed-off-by: Len Bao <len.bao@gmx.us>
Link: https://patch.msgid.link/20260524165249.48941-1-len.bao@gmx.us
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Len Bao
2026-05-24 16:52:48 +00:00
committed by Takashi Iwai
parent 055cda1d47
commit 5d1d092b8d
2 changed files with 3 additions and 3 deletions
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2
sound/drivers/mpu401/mpu401.c
View File

@@ -46,7 +46,7 @@ module_param_array(uart_enter, bool, NULL, 0444);
MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
static struct platform_device *platform_devices[SNDRV_CARDS];
static int pnp_registered;
static int pnp_registered __ro_after_init;
static unsigned int snd_mpu401_devices;
static int snd_mpu401_create(struct device *devptr, int dev,

4
sound/drivers/pcmtest.c
View File

@@ -113,7 +113,7 @@ struct pcmtst_buf_iter {
struct timer_list timer_instance;
};
static struct snd_pcm_hardware snd_pcmtst_hw = {
static struct snd_pcm_hardware snd_pcmtst_hw __ro_after_init = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_NONINTERLEAVED |
@@ -137,7 +137,7 @@ struct pattern_buf {
u32 len;
};
static int buf_allocated;
static int buf_allocated __ro_after_init;
static struct pattern_buf patt_bufs[MAX_CHANNELS_NUM];
static inline void inc_buf_pos(struct pcmtst_buf_iter *v_iter, size_t by, size_t bytes)