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ovl: layer is const

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The ovl_layer struct is never modified except at initialization.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi
2020-01-24 09:46:45 +01:00
parent b7bf9908e1
commit 1346416564
6 changed files with 23 additions and 22 deletions
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12
fs/overlayfs/export.c
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@@ -358,7 +358,7 @@ static struct dentry *ovl_dentry_real_at(struct dentry *dentry, int idx)
*/
static struct dentry *ovl_lookup_real_one(struct dentry *connected,
struct dentry *real,
struct ovl_layer *layer)
const struct ovl_layer *layer)
{
struct inode *dir = d_inode(connected);
struct dentry *this, *parent = NULL;
@@ -414,14 +414,14 @@ fail:
static struct dentry *ovl_lookup_real(struct super_block *sb,
struct dentry *real,
struct ovl_layer *layer);
const struct ovl_layer *layer);
/*
* Lookup an indexed or hashed overlay dentry by real inode.
*/
static struct dentry *ovl_lookup_real_inode(struct super_block *sb,
struct dentry *real,
struct ovl_layer *layer)
const struct ovl_layer *layer)
{
struct ovl_fs *ofs = sb->s_fs_info;
struct dentry *index = NULL;
@@ -486,7 +486,7 @@ static struct dentry *ovl_lookup_real_inode(struct super_block *sb,
*/
static struct dentry *ovl_lookup_real_ancestor(struct super_block *sb,
struct dentry *real,
struct ovl_layer *layer)
const struct ovl_layer *layer)
{
struct dentry *next, *parent = NULL;
struct dentry *ancestor = ERR_PTR(-EIO);
@@ -539,7 +539,7 @@ static struct dentry *ovl_lookup_real_ancestor(struct super_block *sb,
*/
static struct dentry *ovl_lookup_real(struct super_block *sb,
struct dentry *real,
struct ovl_layer *layer)
const struct ovl_layer *layer)
{
struct dentry *connected;
int err = 0;
@@ -645,7 +645,7 @@ static struct dentry *ovl_get_dentry(struct super_block *sb,
struct dentry *index)
{
struct ovl_fs *ofs = sb->s_fs_info;
struct ovl_layer *layer = upper ? &ofs->layers[0] : lowerpath->layer;
const struct ovl_layer *layer = upper ? &ofs->layers[0] : lowerpath->layer;
struct dentry *real = upper ?: (index ?: lowerpath->dentry);
/*