Driver core: Constify struct sysfs_ops in struct kobj_type

Constify struct sysfs_ops.

This is part of the ops structure constification
effort started by Arjan van de Ven et al.

Benefits of this constification:

 * prevents modification of data that is shared
   (referenced) by many other structure instances
   at runtime

 * detects/prevents accidental (but not intentional)
   modification attempts on archs that enforce
   read-only kernel data at runtime

 * potentially better optimized code as the compiler
   can assume that the const data cannot be changed

 * the compiler/linker move const data into .rodata
   and therefore exclude them from false sharing

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: David Teigland <teigland@redhat.com>
Acked-by: Matt Domsch <Matt_Domsch@dell.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Hans J. Koch <hjk@linutronix.de>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

54 files changed, 69 insertions, 70 deletions

diff --git a/Documentation/kobject.txt b/Documentation/kobject.txt
index c79ab996dada..bdb13817e1e9 100644
--- a/Documentation/kobject.txt
+++ b/Documentation/kobject.txt
@@ -266,7 +266,7 @@ kobj_type:
 
     struct kobj_type {
             void (*release)(struct kobject *);
-            struct sysfs_ops    *sysfs_ops;
+            const struct sysfs_ops *sysfs_ops;
             struct attribute    **default_attrs;
     };
 
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 8f060352e129..b3a5818088d9 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -282,7 +282,7 @@ static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char *
         return ret;
 }
 
-static struct sysfs_ops cache_sysfs_ops = {
+static const struct sysfs_ops cache_sysfs_ops = {
         .show   = cache_show
 };
 
diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c
index bb37b1d19a58..01fe9ce28379 100644
--- a/arch/powerpc/kernel/cacheinfo.c
+++ b/arch/powerpc/kernel/cacheinfo.c
@@ -642,7 +642,7 @@ static struct kobj_attribute *cache_index_opt_attrs[] = {
         &cache_assoc_attr,
 };
 
-static struct sysfs_ops cache_index_ops = {
+static const struct sysfs_ops cache_index_ops = {
         .show = cache_index_show,
 };
 
diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index fc065f9da6e5..14726eef1ce0 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -326,7 +326,7 @@ static struct attribute *sq_sysfs_attrs[] = {
         NULL,
 };
 
-static struct sysfs_ops sq_sysfs_ops = {
+static const struct sysfs_ops sq_sysfs_ops = {
         .show   = sq_sysfs_show,
         .store  = sq_sysfs_store,
 };
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index eddb1bdd1b8f..b3eeb66c0a51 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -903,7 +903,7 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
         return ret;
 }
 
-static struct sysfs_ops sysfs_ops = {
+static const struct sysfs_ops sysfs_ops = {
         .show   = show,
         .store  = store,
 };
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 83a3d1f4efca..cda932ca3ade 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -388,7 +388,7 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
         return ret;
 }
 
-static struct sysfs_ops threshold_ops = {
+static const struct sysfs_ops threshold_ops = {
         .show                   = show,
         .store                  = store,
 };
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 15c630813b1c..96e83c2bdb94 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -278,7 +278,7 @@ static struct attribute *integrity_attrs[] = {
         NULL,
 };
 
-static struct sysfs_ops integrity_ops = {
+static const struct sysfs_ops integrity_ops = {
         .show   = &integrity_attr_show,
         .store  = &integrity_attr_store,
 };
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index e85442415db3..2ae2cb3f362f 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -450,7 +450,7 @@ static void blk_release_queue(struct kobject *kobj)
         kmem_cache_free(blk_requestq_cachep, q);
 }
 
-static struct sysfs_ops queue_sysfs_ops = {
+static const struct sysfs_ops queue_sysfs_ops = {
         .show   = queue_attr_show,
         .store  = queue_attr_store,