[PATCH] mark struct file_operations const 9
Arjan van de Ven [Mon, 12 Feb 2007 08:55:37 +0000 (00:55 -0800)]
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>

32 files changed:
arch/powerpc/platforms/cell/spufs/spufs.h
drivers/s390/char/tape_class.c
drivers/s390/char/tape_class.h
security/inode.c
security/keys/proc.c
security/selinux/selinuxfs.c
sound/core/control.c
sound/core/hwdep.c
sound/core/info.c
sound/core/init.c
sound/core/oss/mixer_oss.c
sound/core/oss/pcm_oss.c
sound/core/pcm_native.c
sound/core/rawmidi.c
sound/core/seq/oss/seq_oss.c
sound/core/seq/seq_clientmgr.c
sound/core/sound.c
sound/core/timer.c
sound/oss/ad1889.c
sound/oss/btaudio.c
sound/oss/dmasound/dmasound_core.c
sound/oss/emu10k1/audio.c
sound/oss/emu10k1/midi.c
sound/oss/emu10k1/mixer.c
sound/oss/hal2.c
sound/oss/msnd_pinnacle.c
sound/oss/os.h
sound/oss/sh_dac_audio.c
sound/oss/soundcard.c
sound/oss/via82cxxx_audio.c
sound/oss/vwsnd.c
sound/sound_core.c

index 70fb133..5686446 100644 (file)
@@ -149,7 +149,7 @@ long spufs_run_spu(struct file *file,
                   struct spu_context *ctx, u32 *npc, u32 *status);
 long spufs_create(struct nameidata *nd,
                         unsigned int flags, mode_t mode);
-extern struct file_operations spufs_context_fops;
+extern const struct file_operations spufs_context_fops;
 
 /* gang management */
 struct spu_gang *alloc_spu_gang(void);
index 56b8761..2e0d297 100644 (file)
@@ -36,7 +36,7 @@ static struct class *tape_class;
 struct tape_class_device *register_tape_dev(
        struct device *         device,
        dev_t                   dev,
-       struct file_operations *fops,
+       const struct file_operations *fops,
        char *                  device_name,
        char *                  mode_name)
 {
index 3d0ca05..a8bd9b4 100644 (file)
@@ -52,7 +52,7 @@ struct tape_class_device {
 struct tape_class_device *register_tape_dev(
        struct device *         device,
        dev_t                   dev,
-       struct file_operations *fops,
+       const struct file_operations *fops,
        char *                  device_name,
        char *                  node_name
 );
index 9b16e14..d7ecf89 100644 (file)
@@ -50,7 +50,7 @@ static int default_open(struct inode *inode, struct file *file)
        return 0;
 }
 
-static struct file_operations default_file_ops = {
+static const struct file_operations default_file_ops = {
        .read =         default_read_file,
        .write =        default_write_file,
        .open =         default_open,
@@ -215,7 +215,7 @@ static int create_by_name(const char *name, mode_t mode,
  */
 struct dentry *securityfs_create_file(const char *name, mode_t mode,
                                   struct dentry *parent, void *data,
-                                  struct file_operations *fops)
+                                  const struct file_operations *fops)
 {
        struct dentry *dentry = NULL;
        int error;
index 686a9ee..3e0d0a6 100644 (file)
@@ -33,7 +33,7 @@ static struct seq_operations proc_keys_ops = {
        .show   = proc_keys_show,
 };
 
-static struct file_operations proc_keys_fops = {
+static const struct file_operations proc_keys_fops = {
        .open           = proc_keys_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
@@ -54,7 +54,7 @@ static struct seq_operations proc_key_users_ops = {
        .show   = proc_key_users_show,
 };
 
-static struct file_operations proc_key_users_fops = {
+static const struct file_operations proc_key_users_fops = {
        .open           = proc_key_users_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
index c8bf6e1..93b3177 100644 (file)
@@ -161,7 +161,7 @@ out:
 #define sel_write_enforce NULL
 #endif
 
-static struct file_operations sel_enforce_ops = {
+static const struct file_operations sel_enforce_ops = {
        .read           = sel_read_enforce,
        .write          = sel_write_enforce,
 };
@@ -211,7 +211,7 @@ out:
 #define sel_write_disable NULL
 #endif
 
-static struct file_operations sel_disable_ops = {
+static const struct file_operations sel_disable_ops = {
        .write          = sel_write_disable,
 };
 
@@ -225,7 +225,7 @@ static ssize_t sel_read_policyvers(struct file *filp, char __user *buf,
        return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
 }
 
-static struct file_operations sel_policyvers_ops = {
+static const struct file_operations sel_policyvers_ops = {
        .read           = sel_read_policyvers,
 };
 
@@ -242,7 +242,7 @@ static ssize_t sel_read_mls(struct file *filp, char __user *buf,
        return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
 }
 
-static struct file_operations sel_mls_ops = {
+static const struct file_operations sel_mls_ops = {
        .read           = sel_read_mls,
 };
 
@@ -294,7 +294,7 @@ out:
        return length;
 }
 
-static struct file_operations sel_load_ops = {
+static const struct file_operations sel_load_ops = {
        .write          = sel_write_load,
 };
 
@@ -374,7 +374,7 @@ out:
        free_page((unsigned long) page);
        return length;
 }
-static struct file_operations sel_checkreqprot_ops = {
+static const struct file_operations sel_checkreqprot_ops = {
        .read           = sel_read_checkreqprot,
        .write          = sel_write_checkreqprot,
 };
@@ -423,7 +423,7 @@ out:
        free_page((unsigned long) page);
        return length;
 }
-static struct file_operations sel_compat_net_ops = {
+static const struct file_operations sel_compat_net_ops = {
        .read           = sel_read_compat_net,
        .write          = sel_write_compat_net,
 };
@@ -467,7 +467,7 @@ static ssize_t selinux_transaction_write(struct file *file, const char __user *b
        return rv;
 }
 
-static struct file_operations transaction_ops = {
+static const struct file_operations transaction_ops = {
        .write          = selinux_transaction_write,
        .read           = simple_transaction_read,
        .release        = simple_transaction_release,
@@ -875,7 +875,7 @@ out:
        return length;
 }
 
-static struct file_operations sel_bool_ops = {
+static const struct file_operations sel_bool_ops = {
        .read           = sel_read_bool,
        .write          = sel_write_bool,
 };
@@ -932,7 +932,7 @@ out:
        return length;
 }
 
-static struct file_operations sel_commit_bools_ops = {
+static const struct file_operations sel_commit_bools_ops = {
        .write          = sel_commit_bools_write,
 };
 
@@ -1131,12 +1131,12 @@ out:
        return ret;
 }
 
-static struct file_operations sel_avc_cache_threshold_ops = {
+static const struct file_operations sel_avc_cache_threshold_ops = {
        .read           = sel_read_avc_cache_threshold,
        .write          = sel_write_avc_cache_threshold,
 };
 
-static struct file_operations sel_avc_hash_stats_ops = {
+static const struct file_operations sel_avc_hash_stats_ops = {
        .read           = sel_read_avc_hash_stats,
 };
 
@@ -1198,7 +1198,7 @@ static int sel_open_avc_cache_stats(struct inode *inode, struct file *file)
        return seq_open(file, &sel_avc_cache_stats_seq_ops);
 }
 
-static struct file_operations sel_avc_cache_stats_ops = {
+static const struct file_operations sel_avc_cache_stats_ops = {
        .open           = sel_open_avc_cache_stats,
        .read           = seq_read,
        .llseek         = seq_lseek,
index 42bcf27..86de725 100644 (file)
@@ -1398,7 +1398,7 @@ static int snd_ctl_fasync(int fd, struct file * file, int on)
  *  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,
index 39c03f3..96ffdf1 100644 (file)
@@ -317,7 +317,7 @@ static int snd_hwdep_control_ioctl(struct snd_card *card,
 
  */
 
-static struct file_operations snd_hwdep_f_ops =
+static const struct file_operations snd_hwdep_f_ops =
 {
        .owner =        THIS_MODULE,
        .llseek =       snd_hwdep_llseek,
index 54591e2..bf6dbf9 100644 (file)
@@ -507,7 +507,7 @@ static int snd_info_entry_mmap(struct file *file, struct vm_area_struct *vma)
        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,
index db61037..4a431e3 100644 (file)
@@ -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 @@ static int snd_disconnect_fasync(int fd, struct file *file, int on)
        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,
index 3391f2a..74a2923 100644 (file)
@@ -390,7 +390,7 @@ int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned l
  *  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,
index 786a82e..c4744bb 100644 (file)
@@ -2889,7 +2889,7 @@ static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
  *  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,
index b52e893..3e276fc 100644 (file)
@@ -3424,7 +3424,7 @@ out:
  *  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,
index 7e6ceec..d14dcbb 100644 (file)
@@ -1359,7 +1359,7 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
  *  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,
index 92858cf..2eb9873 100644 (file)
@@ -208,7 +208,7 @@ odev_poll(struct file *file, poll_table * wait)
  * 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,
index bb9dd9f..694efe8 100644 (file)
@@ -2538,7 +2538,7 @@ void snd_seq_info_clients_read(struct snd_info_entry *entry,
  *  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,
index 4084de0..70600df 100644 (file)
@@ -168,7 +168,7 @@ static int snd_open(struct inode *inode, struct file *file)
        return err;
 }
 
-static struct file_operations snd_fops =
+static const struct file_operations snd_fops =
 {
        .owner =        THIS_MODULE,
        .open =         snd_open
index 3e06383..160e40e 100644 (file)
@@ -1901,7 +1901,7 @@ static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait)
 #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,
index 09263d7..f072432 100644 (file)
@@ -778,7 +778,7 @@ static int ad1889_release(struct inode *inode, struct file *file)
        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 @@ static int ad1889_mixer_ioctl(struct inode *inode, struct file *file,
        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,
index ad7210a..f845528 100644 (file)
@@ -429,7 +429,7 @@ static int btaudio_mixer_ioctl(struct inode *inode, struct file *file,
        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 @@ static unsigned int btaudio_dsp_poll(struct file *file, struct poll_table_struct
        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 @@ static struct file_operations btaudio_digital_dsp_fops = {
        .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,
index 80b836e..a0ec886 100644 (file)
@@ -371,7 +371,7 @@ static int mixer_ioctl(struct inode *inode, struct file *file, u_int cmd,
        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 @@ static int sq_ioctl(struct inode *inode, struct file *file, u_int cmd,
        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 @@ static ssize_t state_read(struct file *file, char __user *buf, size_t count,
        return n;
 }
 
-static struct file_operations state_fops = {
+static const struct file_operations state_fops = {
        .owner          = THIS_MODULE,
        .llseek         = no_llseek,
        .read           = state_read,
index efcf589..e75ea21 100644 (file)
@@ -1582,7 +1582,7 @@ static void emu10k1_waveout_bh(unsigned long refdata)
        return;
 }
 
-struct file_operations emu10k1_audio_fops = {
+const struct file_operations emu10k1_audio_fops = {
        .owner          = THIS_MODULE,
        .llseek         = no_llseek,
        .read           = emu10k1_audio_read,
index cca3dad..df1e990 100644 (file)
@@ -458,7 +458,7 @@ int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned lon
 }
 
 /* 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,
index 6419796..bc3805f 100644 (file)
@@ -681,7 +681,7 @@ static int emu10k1_mixer_release(struct inode *inode, struct file *file)
        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,
index d18286c..80a4277 100644 (file)
@@ -1377,7 +1377,7 @@ static int hal2_release(struct inode *inode, struct file *file)
        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 @@ static struct file_operations hal2_audio_fops = {
        .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,
index 24110d6..f1f49eb 100644 (file)
@@ -1106,7 +1106,7 @@ static irqreturn_t intr(int irq, void *dev_id)
        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,
index 0490562..a1a962d 100644 (file)
@@ -43,4 +43,4 @@ extern int sound_nblocks;
 #undef PSEUDO_DMA_AUTOINIT
 #define ALLOW_BUFFER_MAPPING
 
-extern struct file_operations oss_sound_fops;
+extern const struct file_operations oss_sound_fops;
index 51f5541..7ea9acc 100644 (file)
@@ -255,7 +255,7 @@ static int dac_audio_release(struct inode *inode, struct file *file)
        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,
index b92c8cd..dcd8d6d 100644 (file)
@@ -483,7 +483,7 @@ static int sound_mmap(struct file *file, struct vm_area_struct *vma)
        return 0;
 }
 
-struct file_operations oss_sound_fops = {
+const struct file_operations oss_sound_fops = {
        .owner          = THIS_MODULE,
        .llseek         = no_llseek,
        .read           = sound_read,
index c96cc8c..7ab3a73 100644 (file)
@@ -1619,7 +1619,7 @@ out:
 }
 
 
-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 int via_interrupt_init (struct via_info *card)
  *
  */
 
-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,
index 6dfb9f4..d25249a 100644 (file)
@@ -3035,7 +3035,7 @@ static int vwsnd_audio_release(struct inode *inode, struct file *file)
        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 @@ static int vwsnd_mixer_ioctl(struct inode *ioctl,
        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,
index 8f1ced4..46daca1 100644 (file)
@@ -436,7 +436,7 @@ EXPORT_SYMBOL(unregister_sound_dsp);
 
 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,