mm: use octal not symbolic permissions

mm/*.c files use symbolic and octal styles for permissions.

Using octal and not symbolic permissions is preferred by many as more
readable.

https://lkml.org/lkml/2016/8/2/1945

Prefer the direct use of octal for permissions.

Done using
$ scripts/checkpatch.pl -f --types=SYMBOLIC_PERMS --fix-inplace mm/*.c
and some typing.

Before:	 $ git grep -P -w "0[0-7]{3,3}" mm | wc -l
44
After:	 $ git grep -P -w "0[0-7]{3,3}" mm | wc -l
86

Miscellanea:

o Whitespace neatening around these conversions.

Link: http://lkml.kernel.org/r/2e032ef111eebcd4c5952bae86763b541d373469.1522102887.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/cleancache.c

@@ -307,12 +307,10 @@ static int __init init_cleancache(void)
 	struct dentry *root = debugfs_create_dir("cleancache", NULL);
 	if (root == NULL)
 		return -ENXIO;
-	debugfs_create_u64("succ_gets", S_IRUGO, root, &cleancache_succ_gets);
-	debugfs_create_u64("failed_gets", S_IRUGO,
-				root, &cleancache_failed_gets);
-	debugfs_create_u64("puts", S_IRUGO, root, &cleancache_puts);
-	debugfs_create_u64("invalidates", S_IRUGO,
-				root, &cleancache_invalidates);
+	debugfs_create_u64("succ_gets", 0444, root, &cleancache_succ_gets);
+	debugfs_create_u64("failed_gets", 0444, root, &cleancache_failed_gets);
+	debugfs_create_u64("puts", 0444, root, &cleancache_puts);
+	debugfs_create_u64("invalidates", 0444, root, &cleancache_invalidates);
 #endif
 	return 0;
 }

mm/cma_debug.c

@@ -172,23 +172,18 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 
 	tmp = debugfs_create_dir(name, cma_debugfs_root);
 
-	debugfs_create_file("alloc", S_IWUSR, tmp, cma,
-				&cma_alloc_fops);
-
-	debugfs_create_file("free", S_IWUSR, tmp, cma,
-				&cma_free_fops);
-
-	debugfs_create_file("base_pfn", S_IRUGO, tmp,
-				&cma->base_pfn, &cma_debugfs_fops);
-	debugfs_create_file("count", S_IRUGO, tmp,
-				&cma->count, &cma_debugfs_fops);
-	debugfs_create_file("order_per_bit", S_IRUGO, tmp,
-				&cma->order_per_bit, &cma_debugfs_fops);
-	debugfs_create_file("used", S_IRUGO, tmp, cma, &cma_used_fops);
-	debugfs_create_file("maxchunk", S_IRUGO, tmp, cma, &cma_maxchunk_fops);
+	debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);
+	debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);
+	debugfs_create_file("base_pfn", 0444, tmp,
+			    &cma->base_pfn, &cma_debugfs_fops);
+	debugfs_create_file("count", 0444, tmp, &cma->count, &cma_debugfs_fops);
+	debugfs_create_file("order_per_bit", 0444, tmp,
+			    &cma->order_per_bit, &cma_debugfs_fops);
+	debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);
+	debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);
 
 	u32s = DIV_ROUND_UP(cma_bitmap_maxno(cma), BITS_PER_BYTE * sizeof(u32));
-	debugfs_create_u32_array("bitmap", S_IRUGO, tmp, (u32*)cma->bitmap, u32s);
+	debugfs_create_u32_array("bitmap", 0444, tmp, (u32 *)cma->bitmap, u32s);
 }
 
 static int __init cma_debugfs_init(void)

mm/compaction.c

@@ -1899,7 +1899,7 @@ static ssize_t sysfs_compact_node(struct device *dev,
 
 	return count;
 }
-static DEVICE_ATTR(compact, S_IWUSR, NULL, sysfs_compact_node);
+static DEVICE_ATTR(compact, 0200, NULL, sysfs_compact_node);
 
 int compaction_register_node(struct node *node)
 {

mm/dmapool.c

@@ -105,7 +105,7 @@ show_pools(struct device *dev, struct device_attribute *attr, char *buf)
 	return PAGE_SIZE - size;
 }
 
-static DEVICE_ATTR(pools, S_IRUGO, show_pools, NULL);
+static DEVICE_ATTR(pools, 0444, show_pools, NULL);
 
 /**
  * dma_pool_create - Creates a pool of consistent memory blocks, for dma.

mm/failslab.c

@@ -42,7 +42,7 @@ __setup("failslab=", setup_failslab);
 static int __init failslab_debugfs_init(void)
 {
 	struct dentry *dir;
-	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
+	umode_t mode = S_IFREG | 0600;
 
 	dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
 	if (IS_ERR(dir))

mm/frontswap.c

@@ -486,12 +486,11 @@ static int __init init_frontswap(void)
 	struct dentry *root = debugfs_create_dir("frontswap", NULL);
 	if (root == NULL)
 		return -ENXIO;
-	debugfs_create_u64("loads", S_IRUGO, root, &frontswap_loads);
-	debugfs_create_u64("succ_stores", S_IRUGO, root, &frontswap_succ_stores);
-	debugfs_create_u64("failed_stores", S_IRUGO, root,
-				&frontswap_failed_stores);
-	debugfs_create_u64("invalidates", S_IRUGO,
-				root, &frontswap_invalidates);
+	debugfs_create_u64("loads", 0444, root, &frontswap_loads);
+	debugfs_create_u64("succ_stores", 0444, root, &frontswap_succ_stores);
+	debugfs_create_u64("failed_stores", 0444, root,
+			   &frontswap_failed_stores);
+	debugfs_create_u64("invalidates", 0444, root, &frontswap_invalidates);
 #endif
 	return 0;
 }

mm/memblock.c

@@ -1809,10 +1809,13 @@ static int __init memblock_init_debugfs(void)
 	struct dentry *root = debugfs_create_dir("memblock", NULL);
 	if (!root)
 		return -ENXIO;
-	debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops);
-	debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops);
+	debugfs_create_file("memory", 0444, root,
+			    &memblock.memory, &memblock_debug_fops);
+	debugfs_create_file("reserved", 0444, root,
+			    &memblock.reserved, &memblock_debug_fops);
 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
-	debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops);
+	debugfs_create_file("physmem", 0444, root,
+			    &memblock.physmem, &memblock_debug_fops);
 #endif
 
 	return 0;

mm/page_alloc.c

@@ -3061,7 +3061,7 @@ static bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
 
 static int __init fail_page_alloc_debugfs(void)
 {
-	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
+	umode_t mode = S_IFREG | 0600;
 	struct dentry *dir;
 
 	dir = fault_create_debugfs_attr("fail_page_alloc", NULL,

mm/page_idle.c

@@ -201,7 +201,7 @@ static ssize_t page_idle_bitmap_write(struct file *file, struct kobject *kobj,
 }
 
 static struct bin_attribute page_idle_bitmap_attr =
-		__BIN_ATTR(bitmap, S_IRUSR | S_IWUSR,
+		__BIN_ATTR(bitmap, 0600,
 			   page_idle_bitmap_read, page_idle_bitmap_write, 0);
 
 static struct bin_attribute *page_idle_bin_attrs[] = {

mm/page_owner.c

@@ -631,8 +631,8 @@ static int __init pageowner_init(void)
 		return 0;
 	}
 
-	dentry = debugfs_create_file("page_owner", S_IRUSR, NULL,
-			NULL, &proc_page_owner_operations);
+	dentry = debugfs_create_file("page_owner", 0400, NULL,
+				     NULL, &proc_page_owner_operations);
 
 	return PTR_ERR_OR_ZERO(dentry);
 }

mm/shmem.c

@@ -3013,7 +3013,8 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
 	if (len > PAGE_SIZE)
 		return -ENAMETOOLONG;
 
-	inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE);
+	inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK | 0777, 0,
+				VM_NORESERVE);
 	if (!inode)
 		return -ENOSPC;
 
@@ -3445,7 +3446,7 @@ static int shmem_show_options(struct seq_file *seq, struct dentry *root)
 			sbinfo->max_blocks << (PAGE_SHIFT - 10));
 	if (sbinfo->max_inodes != shmem_default_max_inodes())
 		seq_printf(seq, ",nr_inodes=%lu", sbinfo->max_inodes);
-	if (sbinfo->mode != (S_IRWXUGO | S_ISVTX))
+	if (sbinfo->mode != (0777 | S_ISVTX))
 		seq_printf(seq, ",mode=%03ho", sbinfo->mode);
 	if (!uid_eq(sbinfo->uid, GLOBAL_ROOT_UID))
 		seq_printf(seq, ",uid=%u",
@@ -3486,7 +3487,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
 	if (!sbinfo)
 		return -ENOMEM;
 
-	sbinfo->mode = S_IRWXUGO | S_ISVTX;
+	sbinfo->mode = 0777 | S_ISVTX;
 	sbinfo->uid = current_fsuid();
 	sbinfo->gid = current_fsgid();
 	sb->s_fs_info = sbinfo;
@@ -3929,7 +3930,7 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l
 	d_set_d_op(path.dentry, &anon_ops);
 
 	res = ERR_PTR(-ENOSPC);
-	inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
+	inode = shmem_get_inode(sb, NULL, S_IFREG | 0777, 0, flags);
 	if (!inode)
 		goto put_memory;
 

mm/slab_common.c

@@ -1243,9 +1243,9 @@ void cache_random_seq_destroy(struct kmem_cache *cachep)
 
 #if defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)
 #ifdef CONFIG_SLAB
-#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)
+#define SLABINFO_RIGHTS (0600)
 #else
-#define SLABINFO_RIGHTS S_IRUSR
+#define SLABINFO_RIGHTS (0400)
 #endif
 
 static void print_slabinfo_header(struct seq_file *m)

mm/vmalloc.c

@@ -2741,11 +2741,11 @@ static const struct seq_operations vmalloc_op = {
 static int __init proc_vmalloc_init(void)
 {
 	if (IS_ENABLED(CONFIG_NUMA))
-		proc_create_seq_private("vmallocinfo", S_IRUSR, NULL,
+		proc_create_seq_private("vmallocinfo", 0400, NULL,
 				&vmalloc_op,
 				nr_node_ids * sizeof(unsigned int), NULL);
 	else
-		proc_create_seq("vmallocinfo", S_IRUSR, NULL, &vmalloc_op);
+		proc_create_seq("vmallocinfo", 0400, NULL, &vmalloc_op);
 	return 0;
 }
 module_init(proc_vmalloc_init);

mm/zsmalloc.c

@@ -661,8 +661,9 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
 	}
 	pool->stat_dentry = entry;
 
-	entry = debugfs_create_file("classes", S_IFREG | S_IRUGO,
-			pool->stat_dentry, pool, &zs_stats_size_fops);
+	entry = debugfs_create_file("classes", S_IFREG | 0444,
+				    pool->stat_dentry, pool,
+				    &zs_stats_size_fops);
 	if (!entry) {
 		pr_warn("%s: debugfs file entry <%s> creation failed\n",
 				name, "classes");

mm/zswap.c

@@ -1256,26 +1256,26 @@ static int __init zswap_debugfs_init(void)
 	if (!zswap_debugfs_root)
 		return -ENOMEM;
 
-	debugfs_create_u64("pool_limit_hit", S_IRUGO,
-			zswap_debugfs_root, &zswap_pool_limit_hit);
-	debugfs_create_u64("reject_reclaim_fail", S_IRUGO,
-			zswap_debugfs_root, &zswap_reject_reclaim_fail);
-	debugfs_create_u64("reject_alloc_fail", S_IRUGO,
-			zswap_debugfs_root, &zswap_reject_alloc_fail);
-	debugfs_create_u64("reject_kmemcache_fail", S_IRUGO,
-			zswap_debugfs_root, &zswap_reject_kmemcache_fail);
-	debugfs_create_u64("reject_compress_poor", S_IRUGO,
-			zswap_debugfs_root, &zswap_reject_compress_poor);
-	debugfs_create_u64("written_back_pages", S_IRUGO,
-			zswap_debugfs_root, &zswap_written_back_pages);
-	debugfs_create_u64("duplicate_entry", S_IRUGO,
-			zswap_debugfs_root, &zswap_duplicate_entry);
-	debugfs_create_u64("pool_total_size", S_IRUGO,
-			zswap_debugfs_root, &zswap_pool_total_size);
-	debugfs_create_atomic_t("stored_pages", S_IRUGO,
-			zswap_debugfs_root, &zswap_stored_pages);
+	debugfs_create_u64("pool_limit_hit", 0444,
+			   zswap_debugfs_root, &zswap_pool_limit_hit);
+	debugfs_create_u64("reject_reclaim_fail", 0444,
+			   zswap_debugfs_root, &zswap_reject_reclaim_fail);
+	debugfs_create_u64("reject_alloc_fail", 0444,
+			   zswap_debugfs_root, &zswap_reject_alloc_fail);
+	debugfs_create_u64("reject_kmemcache_fail", 0444,
+			   zswap_debugfs_root, &zswap_reject_kmemcache_fail);
+	debugfs_create_u64("reject_compress_poor", 0444,
+			   zswap_debugfs_root, &zswap_reject_compress_poor);
+	debugfs_create_u64("written_back_pages", 0444,
+			   zswap_debugfs_root, &zswap_written_back_pages);
+	debugfs_create_u64("duplicate_entry", 0444,
+			   zswap_debugfs_root, &zswap_duplicate_entry);
+	debugfs_create_u64("pool_total_size", 0444,
+			   zswap_debugfs_root, &zswap_pool_total_size);
+	debugfs_create_atomic_t("stored_pages", 0444,
+				zswap_debugfs_root, &zswap_stored_pages);
 	debugfs_create_atomic_t("same_filled_pages", 0444,
-			zswap_debugfs_root, &zswap_same_filled_pages);
+				zswap_debugfs_root, &zswap_same_filled_pages);
 
 	return 0;
 }