[PATCH] mark struct file_operations const 3

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>

17 files changed, 21 insertions, 21 deletions

diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c
index 9f8082f..7f60a18 100644
--- a/drivers/char/briq_panel.c
+++ b/drivers/char/briq_panel.c
@@ -187,7 +187,7 @@ static ssize_t briq_panel_write(struct file *file, const char __user *buf, size_
 	return len;
 }
 
-static struct file_operations briq_panel_fops = {
+static const struct file_operations briq_panel_fops = {
 	.owner		= THIS_MODULE,
 	.read		= briq_panel_read,
 	.write		= briq_panel_write,
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index a70af0d..f5b9b24 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -371,7 +371,7 @@ void drm_exit(struct drm_driver *driver)
 EXPORT_SYMBOL(drm_exit);
 
 /** File operations structure */
-static struct file_operations drm_stub_fops = {
+static const struct file_operations drm_stub_fops = {
 	.owner = THIS_MODULE,
 	.open = drm_stub_open
 };
diff --git a/drivers/char/drm/i810_dma.c b/drivers/char/drm/i810_dma.c
index 60cb4e4..603d17f 100644
--- a/drivers/char/drm/i810_dma.c
+++ b/drivers/char/drm/i810_dma.c
@@ -112,7 +112,7 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 	return 0;
 }
 
-static struct file_operations i810_buffer_fops = {
+static const struct file_operations i810_buffer_fops = {
 	.open = drm_open,
 	.release = drm_release,
 	.ioctl = drm_ioctl,
diff --git a/drivers/char/drm/i830_dma.c b/drivers/char/drm/i830_dma.c
index 9522445..3314a9f 100644
--- a/drivers/char/drm/i830_dma.c
+++ b/drivers/char/drm/i830_dma.c
@@ -114,7 +114,7 @@ static int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 	return 0;
 }
 
-static struct file_operations i830_buffer_fops = {
+static const struct file_operations i830_buffer_fops = {
 	.open = drm_open,
 	.release = drm_release,
 	.ioctl = drm_ioctl,
diff --git a/drivers/char/generic_nvram.c b/drivers/char/generic_nvram.c
index 43ff598..2398e86 100644
--- a/drivers/char/generic_nvram.c
+++ b/drivers/char/generic_nvram.c
@@ -117,7 +117,7 @@ static int nvram_ioctl(struct inode *inode, struct file *file,
 	return 0;
 }
 
-struct file_operations nvram_fops = {
+const struct file_operations nvram_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= nvram_llseek,
 	.read		= read_nvram,
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index 0afb7ba..57f9115 100644
--- a/drivers/char/mbcs.c
+++ b/drivers/char/mbcs.c
@@ -46,7 +46,7 @@ LIST_HEAD(soft_list);
 /*
  * file operations
  */
-struct file_operations mbcs_ops = {
+const struct file_operations mbcs_ops = {
 	.open = mbcs_open,
 	.llseek = mbcs_sram_llseek,
 	.read = mbcs_sram_read,
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 235e892..7ac3061 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -291,7 +291,7 @@ uncached_mmap(struct file *file, struct vm_area_struct *vma)
 	return mspec_mmap(file, vma, MSPEC_UNCACHED);
 }
 
-static struct file_operations fetchop_fops = {
+static const struct file_operations fetchop_fops = {
 	.owner = THIS_MODULE,
 	.mmap = fetchop_mmap
 };
@@ -302,7 +302,7 @@ static struct miscdevice fetchop_miscdev = {
 	.fops = &fetchop_fops
 };
 
-static struct file_operations cached_fops = {
+static const struct file_operations cached_fops = {
 	.owner = THIS_MODULE,
 	.mmap = cached_mmap
 };
@@ -313,7 +313,7 @@ static struct miscdevice cached_miscdev = {
 	.fops = &cached_fops
 };
 
-static struct file_operations uncached_fops = {
+static const struct file_operations uncached_fops = {
 	.owner = THIS_MODULE,
 	.mmap = uncached_mmap
 };
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 13d0b13..b9dc7aa 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1117,14 +1117,14 @@ random_ioctl(struct inode * inode, struct file * file,
 	}
 }
 
-struct file_operations random_fops = {
+const struct file_operations random_fops = {
 	.read  = random_read,
 	.write = random_write,
 	.poll  = random_poll,
 	.ioctl = random_ioctl,
 };
 
-struct file_operations urandom_fops = {
+const struct file_operations urandom_fops = {
 	.read  = urandom_read,
 	.write = random_write,
 	.ioctl = random_ioctl,
diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_bios.c
index 7fca5f4..4eba32b 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_bios.c
@@ -441,7 +441,7 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode,
 	return err;
 }
 
-struct file_operations tpm_ascii_bios_measurements_ops = {
+const struct file_operations tpm_ascii_bios_measurements_ops = {
 	.open = tpm_ascii_bios_measurements_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
@@ -474,7 +474,7 @@ static int tpm_binary_bios_measurements_open(struct inode *inode,
 	return err;
 }
 
-struct file_operations tpm_binary_bios_measurements_ops = {
+const struct file_operations tpm_binary_bios_measurements_ops = {
 	.open = tpm_binary_bios_measurements_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 9438512..13faf8d 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -872,7 +872,7 @@ free_op:
 	return ret;
 }
 
-struct file_operations viotap_fops = {
+const struct file_operations viotap_fops = {
 	owner: THIS_MODULE,
 	read: viotap_read,
 	write: viotap_write,
diff --git a/drivers/char/watchdog/iTCO_wdt.c b/drivers/char/watchdog/iTCO_wdt.c
index 7eac922..fd8a44a 100644
--- a/drivers/char/watchdog/iTCO_wdt.c
+++ b/drivers/char/watchdog/iTCO_wdt.c
@@ -539,7 +539,7 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
  *	Kernel Interfaces
  */
 
-static struct file_operations iTCO_wdt_fops = {
+static const struct file_operations iTCO_wdt_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.write =	iTCO_wdt_write,
diff --git a/drivers/char/watchdog/omap_wdt.c b/drivers/char/watchdog/omap_wdt.c
index 6c6f973..84074a6 100644
--- a/drivers/char/watchdog/omap_wdt.c
+++ b/drivers/char/watchdog/omap_wdt.c
@@ -230,7 +230,7 @@ omap_wdt_ioctl(struct inode *inode, struct file *file,
 	}
 }
 
-static struct file_operations omap_wdt_fops = {
+static const struct file_operations omap_wdt_fops = {
 	.owner = THIS_MODULE,
 	.write = omap_wdt_write,
 	.ioctl = omap_wdt_ioctl,
diff --git a/drivers/char/watchdog/pc87413_wdt.c b/drivers/char/watchdog/pc87413_wdt.c
index 1d447e32..a77a907 100644
--- a/drivers/char/watchdog/pc87413_wdt.c
+++ b/drivers/char/watchdog/pc87413_wdt.c
@@ -526,7 +526,7 @@ static int pc87413_notify_sys(struct notifier_block *this,
 
 /* -- Module's structures ---------------------------------------*/
 
-static struct file_operations pc87413_fops = {
+static const struct file_operations pc87413_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.write		= pc87413_write,
diff --git a/drivers/char/watchdog/pnx4008_wdt.c b/drivers/char/watchdog/pnx4008_wdt.c
index 3a55fc6..ff6f1ca 100644
--- a/drivers/char/watchdog/pnx4008_wdt.c
+++ b/drivers/char/watchdog/pnx4008_wdt.c
@@ -238,7 +238,7 @@ static int pnx4008_wdt_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations pnx4008_wdt_fops = {
+static const struct file_operations pnx4008_wdt_fops = {
 	.owner = THIS_MODULE,
 	.llseek = no_llseek,
 	.write = pnx4008_wdt_write,
diff --git a/drivers/char/watchdog/rm9k_wdt.c b/drivers/char/watchdog/rm9k_wdt.c
index 7576a13..b467883 100644
--- a/drivers/char/watchdog/rm9k_wdt.c
+++ b/drivers/char/watchdog/rm9k_wdt.c
@@ -95,7 +95,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be disabled once started");
 
 
 /* Kernel interfaces */
-static struct file_operations fops = {
+static const struct file_operations fops = {
 	.owner		= THIS_MODULE,
 	.open		= wdt_gpi_open,
 	.release	= wdt_gpi_release,
diff --git a/drivers/char/watchdog/smsc37b787_wdt.c b/drivers/char/watchdog/smsc37b787_wdt.c
index 9f56913..a9681d5 100644
--- a/drivers/char/watchdog/smsc37b787_wdt.c
+++ b/drivers/char/watchdog/smsc37b787_wdt.c
@@ -510,7 +510,7 @@ static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long cod
 
 /* -- Module's structures ---------------------------------------*/
 
-static struct file_operations wb_smsc_wdt_fops =
+static const struct file_operations wb_smsc_wdt_fops =
 {
 	.owner          = THIS_MODULE,
 	.llseek		= no_llseek,
diff --git a/drivers/char/watchdog/w83697hf_wdt.c b/drivers/char/watchdog/w83697hf_wdt.c
index 7768b55..c960ec1 100644
--- a/drivers/char/watchdog/w83697hf_wdt.c
+++ b/drivers/char/watchdog/w83697hf_wdt.c
@@ -323,7 +323,7 @@ wdt_notify_sys(struct notifier_block *this, unsigned long code,
  *	Kernel Interfaces
  */
 
-static struct file_operations wdt_fops = {
+static const struct file_operations wdt_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.write		= wdt_write,