[PATCH] mark struct file_operations const 9
Many struct file_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data. In addition it'll catch accidental writes at compile time to
these shared resources.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/sound/core/control.c b/sound/core/control.c
index 42bcf27..86de725 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1398,7 +1398,7 @@
* INIT PART
*/
-static struct file_operations snd_ctl_f_ops =
+static const struct file_operations snd_ctl_f_ops =
{
.owner = THIS_MODULE,
.read = snd_ctl_read,
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 39c03f3..96ffdf1 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -317,7 +317,7 @@
*/
-static struct file_operations snd_hwdep_f_ops =
+static const struct file_operations snd_hwdep_f_ops =
{
.owner = THIS_MODULE,
.llseek = snd_hwdep_llseek,
diff --git a/sound/core/info.c b/sound/core/info.c
index 54591e2..bf6dbf9 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -507,7 +507,7 @@
return -ENXIO;
}
-static struct file_operations snd_info_entry_operations =
+static const struct file_operations snd_info_entry_operations =
{
.owner = THIS_MODULE,
.llseek = snd_info_entry_llseek,
diff --git a/sound/core/init.c b/sound/core/init.c
index db61037..4a431e3 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -36,7 +36,7 @@
static DEFINE_SPINLOCK(shutdown_lock);
static LIST_HEAD(shutdown_files);
-static struct file_operations snd_shutdown_f_ops;
+static const struct file_operations snd_shutdown_f_ops;
static unsigned int snd_cards_lock; /* locked for registering/using */
struct snd_card *snd_cards[SNDRV_CARDS];
@@ -244,7 +244,7 @@
return -ENODEV;
}
-static struct file_operations snd_shutdown_f_ops =
+static const struct file_operations snd_shutdown_f_ops =
{
.owner = THIS_MODULE,
.llseek = snd_disconnect_llseek,
diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c
index 3391f2a9..74a2923 100644
--- a/sound/core/oss/mixer_oss.c
+++ b/sound/core/oss/mixer_oss.c
@@ -390,7 +390,7 @@
* REGISTRATION PART
*/
-static struct file_operations snd_mixer_oss_f_ops =
+static const struct file_operations snd_mixer_oss_f_ops =
{
.owner = THIS_MODULE,
.open = snd_mixer_oss_open,
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 786a82e..c4744bb 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -2889,7 +2889,7 @@
* ENTRY functions
*/
-static struct file_operations snd_pcm_oss_f_reg =
+static const struct file_operations snd_pcm_oss_f_reg =
{
.owner = THIS_MODULE,
.read = snd_pcm_oss_read,
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index b52e893..3e276fc 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3424,7 +3424,7 @@
* Register section
*/
-struct file_operations snd_pcm_f_ops[2] = {
+const struct file_operations snd_pcm_f_ops[2] = {
{
.owner = THIS_MODULE,
.write = snd_pcm_write,
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index 7e6ceec..d14dcbb 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -1359,7 +1359,7 @@
* Register functions
*/
-static struct file_operations snd_rawmidi_f_ops =
+static const struct file_operations snd_rawmidi_f_ops =
{
.owner = THIS_MODULE,
.read = snd_rawmidi_read,
diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c
index 92858cf..2eb9873 100644
--- a/sound/core/seq/oss/seq_oss.c
+++ b/sound/core/seq/oss/seq_oss.c
@@ -208,7 +208,7 @@
* registration of sequencer minor device
*/
-static struct file_operations seq_oss_f_ops =
+static const struct file_operations seq_oss_f_ops =
{
.owner = THIS_MODULE,
.read = odev_read,
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index bb9dd9f..694efe8 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -2538,7 +2538,7 @@
* REGISTRATION PART
*/
-static struct file_operations snd_seq_f_ops =
+static const struct file_operations snd_seq_f_ops =
{
.owner = THIS_MODULE,
.read = snd_seq_read,
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 4084de0..70600df 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -168,7 +168,7 @@
return err;
}
-static struct file_operations snd_fops =
+static const struct file_operations snd_fops =
{
.owner = THIS_MODULE,
.open = snd_open
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 3e06383..160e40e 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1901,7 +1901,7 @@
#define snd_timer_user_ioctl_compat NULL
#endif
-static struct file_operations snd_timer_f_ops =
+static const struct file_operations snd_timer_f_ops =
{
.owner = THIS_MODULE,
.read = snd_timer_user_read,
diff --git a/sound/oss/ad1889.c b/sound/oss/ad1889.c
index 09263d7..f072432 100644
--- a/sound/oss/ad1889.c
+++ b/sound/oss/ad1889.c
@@ -778,7 +778,7 @@
return 0;
}
-static struct file_operations ad1889_fops = {
+static const struct file_operations ad1889_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = ad1889_read,
@@ -812,7 +812,7 @@
return codec->mixer_ioctl(codec, cmd, arg);
}
-static struct file_operations ad1889_mixer_fops = {
+static const struct file_operations ad1889_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = ad1889_mixer_ioctl,
diff --git a/sound/oss/btaudio.c b/sound/oss/btaudio.c
index ad7210a..f845528 100644
--- a/sound/oss/btaudio.c
+++ b/sound/oss/btaudio.c
@@ -429,7 +429,7 @@
return 0;
}
-static struct file_operations btaudio_mixer_fops = {
+static const struct file_operations btaudio_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = btaudio_mixer_open,
@@ -796,7 +796,7 @@
return mask;
}
-static struct file_operations btaudio_digital_dsp_fops = {
+static const struct file_operations btaudio_digital_dsp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = btaudio_dsp_open_digital,
@@ -807,7 +807,7 @@
.poll = btaudio_dsp_poll,
};
-static struct file_operations btaudio_analog_dsp_fops = {
+static const struct file_operations btaudio_analog_dsp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = btaudio_dsp_open_analog,
diff --git a/sound/oss/dmasound/dmasound_core.c b/sound/oss/dmasound/dmasound_core.c
index 80b836e..a0ec886 100644
--- a/sound/oss/dmasound/dmasound_core.c
+++ b/sound/oss/dmasound/dmasound_core.c
@@ -371,7 +371,7 @@
return -EINVAL;
}
-static struct file_operations mixer_fops =
+static const struct file_operations mixer_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -1337,7 +1337,7 @@
return -EINVAL;
}
-static struct file_operations sq_fops =
+static const struct file_operations sq_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -1561,7 +1561,7 @@
return n;
}
-static struct file_operations state_fops = {
+static const struct file_operations state_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = state_read,
diff --git a/sound/oss/emu10k1/audio.c b/sound/oss/emu10k1/audio.c
index efcf589..e75ea21 100644
--- a/sound/oss/emu10k1/audio.c
+++ b/sound/oss/emu10k1/audio.c
@@ -1582,7 +1582,7 @@
return;
}
-struct file_operations emu10k1_audio_fops = {
+const struct file_operations emu10k1_audio_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = emu10k1_audio_read,
diff --git a/sound/oss/emu10k1/midi.c b/sound/oss/emu10k1/midi.c
index cca3dad..df1e990 100644
--- a/sound/oss/emu10k1/midi.c
+++ b/sound/oss/emu10k1/midi.c
@@ -458,7 +458,7 @@
}
/* MIDI file operations */
-struct file_operations emu10k1_midi_fops = {
+const struct file_operations emu10k1_midi_fops = {
.owner = THIS_MODULE,
.read = emu10k1_midi_read,
.write = emu10k1_midi_write,
diff --git a/sound/oss/emu10k1/mixer.c b/sound/oss/emu10k1/mixer.c
index 6419796..bc3805f 100644
--- a/sound/oss/emu10k1/mixer.c
+++ b/sound/oss/emu10k1/mixer.c
@@ -681,7 +681,7 @@
return 0;
}
-struct file_operations emu10k1_mixer_fops = {
+const struct file_operations emu10k1_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = emu10k1_mixer_ioctl,
diff --git a/sound/oss/hal2.c b/sound/oss/hal2.c
index d18286c..80a4277 100644
--- a/sound/oss/hal2.c
+++ b/sound/oss/hal2.c
@@ -1377,7 +1377,7 @@
return 0;
}
-static struct file_operations hal2_audio_fops = {
+static const struct file_operations hal2_audio_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = hal2_read,
@@ -1388,7 +1388,7 @@
.release = hal2_release,
};
-static struct file_operations hal2_mixer_fops = {
+static const struct file_operations hal2_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = hal2_ioctl_mixdev,
diff --git a/sound/oss/msnd_pinnacle.c b/sound/oss/msnd_pinnacle.c
index 24110d6..f1f49eb 100644
--- a/sound/oss/msnd_pinnacle.c
+++ b/sound/oss/msnd_pinnacle.c
@@ -1106,7 +1106,7 @@
return IRQ_HANDLED;
}
-static struct file_operations dev_fileops = {
+static const struct file_operations dev_fileops = {
.owner = THIS_MODULE,
.read = dev_read,
.write = dev_write,
diff --git a/sound/oss/os.h b/sound/oss/os.h
index 0490562..a1a962d 100644
--- a/sound/oss/os.h
+++ b/sound/oss/os.h
@@ -43,4 +43,4 @@
#undef PSEUDO_DMA_AUTOINIT
#define ALLOW_BUFFER_MAPPING
-extern struct file_operations oss_sound_fops;
+extern const struct file_operations oss_sound_fops;
diff --git a/sound/oss/sh_dac_audio.c b/sound/oss/sh_dac_audio.c
index 51f5541..7ea9acc 100644
--- a/sound/oss/sh_dac_audio.c
+++ b/sound/oss/sh_dac_audio.c
@@ -255,7 +255,7 @@
return 0;
}
-struct file_operations dac_audio_fops = {
+const struct file_operations dac_audio_fops = {
.read = dac_audio_read,
.write = dac_audio_write,
.ioctl = dac_audio_ioctl,
diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
index b92c8cd..dcd8d6d 100644
--- a/sound/oss/soundcard.c
+++ b/sound/oss/soundcard.c
@@ -483,7 +483,7 @@
return 0;
}
-struct file_operations oss_sound_fops = {
+const struct file_operations oss_sound_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = sound_read,
diff --git a/sound/oss/via82cxxx_audio.c b/sound/oss/via82cxxx_audio.c
index c96cc8c..7ab3a73 100644
--- a/sound/oss/via82cxxx_audio.c
+++ b/sound/oss/via82cxxx_audio.c
@@ -1619,7 +1619,7 @@
}
-static struct file_operations via_mixer_fops = {
+static const struct file_operations via_mixer_fops = {
.owner = THIS_MODULE,
.open = via_mixer_open,
.llseek = no_llseek,
@@ -2042,7 +2042,7 @@
*
*/
-static struct file_operations via_dsp_fops = {
+static const struct file_operations via_dsp_fops = {
.owner = THIS_MODULE,
.open = via_dsp_open,
.release = via_dsp_release,
diff --git a/sound/oss/vwsnd.c b/sound/oss/vwsnd.c
index 6dfb9f4..d25249a 100644
--- a/sound/oss/vwsnd.c
+++ b/sound/oss/vwsnd.c
@@ -3035,7 +3035,7 @@
return err;
}
-static struct file_operations vwsnd_audio_fops = {
+static const struct file_operations vwsnd_audio_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = vwsnd_audio_read,
@@ -3225,7 +3225,7 @@
return retval;
}
-static struct file_operations vwsnd_mixer_fops = {
+static const struct file_operations vwsnd_mixer_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = vwsnd_mixer_ioctl,
diff --git a/sound/sound_core.c b/sound/sound_core.c
index 8f1ced4..46daca1 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -436,7 +436,7 @@
static int soundcore_open(struct inode *, struct file *);
-static struct file_operations soundcore_fops=
+static const struct file_operations soundcore_fops=
{
/* We must have an owner or the module locking fails */
.owner = THIS_MODULE,