[PATCH] mark struct file_operations const 2

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.

[akpm@osdl.org: sparc64 fix]
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>

5 files changed, 5 insertions, 5 deletions

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 199016927541..db99a8948dae 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -1894,7 +1894,7 @@ static int __init apm_setup(char *str)
 __setup("apm=", apm_setup);
 #endif
 
-static struct file_operations apm_bios_fops = {
+static const struct file_operations apm_bios_fops = {
         .owner          = THIS_MODULE,
         .read           = do_read,
         .poll           = do_poll,
diff --git a/arch/i386/kernel/cpu/mtrr/if.c b/arch/i386/kernel/cpu/mtrr/if.c
index 5ae1705eafa6..ee771f305f96 100644
--- a/arch/i386/kernel/cpu/mtrr/if.c
+++ b/arch/i386/kernel/cpu/mtrr/if.c
@@ -339,7 +339,7 @@ static int mtrr_open(struct inode *inode, struct file *file)
         return single_open(file, mtrr_seq_show, NULL);
 }
 
-static struct file_operations mtrr_fops = {
+static const struct file_operations mtrr_fops = {
         .owner   = THIS_MODULE,
         .open    = mtrr_open, 
         .read    = seq_read,
diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
index 51130b39cd2e..4da75fa3208d 100644
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -148,7 +148,7 @@ static int cpuid_open(struct inode *inode, struct file *file)
 /*
  * File operations we support
  */
-static struct file_operations cpuid_fops = {
+static const struct file_operations cpuid_fops = {
         .owner = THIS_MODULE,
         .llseek = cpuid_seek,
         .read = cpuid_read,
diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c
index c8fa13721bcb..381252bae3d8 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -451,7 +451,7 @@ static ssize_t microcode_write (struct file *file, const char __user *buf, size_
         return ret;
 }
 
-static struct file_operations microcode_fops = {
+static const struct file_operations microcode_fops = {
         .owner          = THIS_MODULE,
         .write          = microcode_write,
         .open           = microcode_open,
diff --git a/arch/i386/kernel/msr.c b/arch/i386/kernel/msr.c
index 4a472a17d1c6..4e14264f392a 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -230,7 +230,7 @@ static int msr_open(struct inode *inode, struct file *file)
 /*
  * File operations we support
  */
-static struct file_operations msr_fops = {
+static const struct file_operations msr_fops = {
         .owner = THIS_MODULE,
         .llseek = msr_seek,
         .read = msr_read,