[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>
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 19901692..db99a89 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -1894,7 +1894,7 @@
__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 5ae1705..ee771f3 100644
--- a/arch/i386/kernel/cpu/mtrr/if.c
+++ b/arch/i386/kernel/cpu/mtrr/if.c
@@ -339,7 +339,7 @@
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 51130b3..4da75fa 100644
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -148,7 +148,7 @@
/*
* 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 c8fa137..381252b 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -451,7 +451,7 @@
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 4a472a1..4e14264 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -230,7 +230,7 @@
/*
* 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,
