powerpc/spufs: Constify context contents and coredump callback constants

The spufs context directory contents definitions are not changed after
initialisation, so we can declare them as const. We can do the same
with the spu coredump reader callbacks too.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/cell/spufs/file.c

@@ -2665,7 +2665,7 @@ static const struct file_operations spufs_ctx_fops = {
 	.release        = single_release,
 };
 
-struct spufs_tree_descr spufs_dir_contents[] = {
+const struct spufs_tree_descr spufs_dir_contents[] = {
 	{ "capabilities", &spufs_caps_fops, 0444, },
 	{ "mem",  &spufs_mem_fops,  0666, LS_SIZE, },
 	{ "regs", &spufs_regs_fops,  0666, sizeof(struct spu_reg128[128]), },
@@ -2706,7 +2706,7 @@ struct spufs_tree_descr spufs_dir_contents[] = {
 	{},
 };
 
-struct spufs_tree_descr spufs_dir_nosched_contents[] = {
+const struct spufs_tree_descr spufs_dir_nosched_contents[] = {
 	{ "capabilities", &spufs_caps_fops, 0444, },
 	{ "mem",  &spufs_mem_fops,  0666, LS_SIZE, },
 	{ "mbox", &spufs_mbox_fops, 0444, },
@@ -2731,12 +2731,12 @@ struct spufs_tree_descr spufs_dir_nosched_contents[] = {
 	{},
 };
 
-struct spufs_tree_descr spufs_dir_debug_contents[] = {
+const struct spufs_tree_descr spufs_dir_debug_contents[] = {
 	{ ".ctx", &spufs_ctx_fops, 0444, },
 	{},
 };
 
-struct spufs_coredump_reader spufs_coredump_read[] = {
+const struct spufs_coredump_reader spufs_coredump_read[] = {
 	{ "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])},
 	{ "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) },
 	{ "lslr", NULL, spufs_lslr_get, 19 },

arch/powerpc/platforms/cell/spufs/inode.c

@@ -186,8 +186,9 @@ static int spufs_rmdir(struct inode *parent, struct dentry *dir)
 	return simple_rmdir(parent, dir);
 }
 
-static int spufs_fill_dir(struct dentry *dir, struct spufs_tree_descr *files,
-			  int mode, struct spu_context *ctx)
+static int spufs_fill_dir(struct dentry *dir,
+		const struct spufs_tree_descr *files, int mode,
+		struct spu_context *ctx)
 {
 	struct dentry *dentry, *tmp;
 	int ret;

arch/powerpc/platforms/cell/spufs/spufs.h

@@ -241,9 +241,9 @@ struct spufs_tree_descr {
 	size_t size;
 };
 
-extern struct spufs_tree_descr spufs_dir_contents[];
-extern struct spufs_tree_descr spufs_dir_nosched_contents[];
-extern struct spufs_tree_descr spufs_dir_debug_contents[];
+extern const struct spufs_tree_descr spufs_dir_contents[];
+extern const struct spufs_tree_descr spufs_dir_nosched_contents[];
+extern const struct spufs_tree_descr spufs_dir_debug_contents[];
 
 /* system call implementation */
 extern struct spufs_calls spufs_calls;
@@ -358,7 +358,7 @@ struct spufs_coredump_reader {
 	u64 (*get)(struct spu_context *ctx);
 	size_t size;
 };
-extern struct spufs_coredump_reader spufs_coredump_read[];
+extern const struct spufs_coredump_reader spufs_coredump_read[];
 extern int spufs_coredump_num_notes;
 
 extern int spu_init_csa(struct spu_state *csa);