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| author | Takashi Iwai <tiwai@suse.de> | 2014-10-15 14:00:16 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-10-15 14:00:16 +0200 |
| commit | 54841a06c54eb55918948c12ab9b5f02cacb6ab3 (patch) | |
| tree | e2efd5a9e66c2e338d71690a0aac5deb21870ab1 /sound/core | |
| parent | Linux 3.17 (diff) | |
| download | linux-54841a06c54eb55918948c12ab9b5f02cacb6ab3.tar.xz linux-54841a06c54eb55918948c12ab9b5f02cacb6ab3.zip | |
ALSA: seq: Use atomic ops for autoload refcount
... just to robustify for races.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/seq/seq_device.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c index 91a786a783e1..775ea9390110 100644 --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -127,15 +127,15 @@ static void snd_seq_device_info(struct snd_info_entry *entry, #ifdef CONFIG_MODULES /* avoid auto-loading during module_init() */ -static int snd_seq_in_init; +static atomic_t snd_seq_in_init = ATOMIC_INIT(0); void snd_seq_autoload_lock(void) { - snd_seq_in_init++; + atomic_inc(&snd_seq_in_init); } void snd_seq_autoload_unlock(void) { - snd_seq_in_init--; + atomic_dec(&snd_seq_in_init); } #endif @@ -147,7 +147,7 @@ void snd_seq_device_load_drivers(void) /* Calling request_module during module_init() * may cause blocking. */ - if (snd_seq_in_init) + if (atomic_read(&snd_seq_in_init)) return; mutex_lock(&ops_mutex); |