diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index c43bad400c30..d0dd2be3885b 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -440,7 +440,7 @@ As of kernel 2.6.22, the following members are defined:
 				   unsigned open_flag, umode_t create_mode);
 		int (*tmpfile) (struct mnt_idmap *, struct inode *, struct file *, umode_t);
 		struct posix_acl * (*get_acl)(struct mnt_idmap *, struct dentry *, int);
-	        int (*set_acl)(struct mnt_idmap *, struct dentry *, struct posix_acl *, int);
+	        int (*set_acl)(const struct mnt_idmap *, struct dentry *, struct posix_acl *, int);
 		int (*fileattr_set)(const struct mnt_idmap *idmap,
 				    struct dentry *dentry, struct file_kattr *fa);
 		int (*fileattr_get)(struct dentry *dentry, struct file_kattr *fa);
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index ae7e7cf7523a..d09a41336d0d 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -152,7 +152,7 @@ struct posix_acl *v9fs_iop_get_acl(struct mnt_idmap *idmap,
 	return v9fs_get_cached_acl(d_inode(dentry), type);
 }
 
-int v9fs_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int v9fs_iop_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		     struct posix_acl *acl, int type)
 {
 	int retval;
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
index 333cfcc281da..7de74704c465 100644
--- a/fs/9p/acl.h
+++ b/fs/9p/acl.h
@@ -12,7 +12,7 @@ struct posix_acl *v9fs_iop_get_inode_acl(struct inode *inode, int type,
 				   bool rcu);
 struct posix_acl *v9fs_iop_get_acl(struct mnt_idmap *idmap,
 					  struct dentry *dentry, int type);
-int v9fs_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int v9fs_iop_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		     struct posix_acl *acl, int type);
 int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid);
 int v9fs_set_create_acl(struct inode *inode, struct p9_fid *fid,
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index c2cfa9395bc9..6e116810f66d 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -153,7 +153,7 @@ static int bad_inode_tmpfile(struct mnt_idmap *idmap,
 	return -EIO;
 }
 
-static int bad_inode_set_acl(struct mnt_idmap *idmap,
+static int bad_inode_set_acl(const struct mnt_idmap *idmap,
 			     struct dentry *dentry, struct posix_acl *acl,
 			     int type)
 {
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 662cdd1cbdef..10a0d733bfd1 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -101,7 +101,7 @@ int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode,
 	return 0;
 }
 
-int btrfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int btrfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		  struct posix_acl *acl, int type)
 {
 	int ret;
diff --git a/fs/btrfs/acl.h b/fs/btrfs/acl.h
index 0458cd51ed48..6eae2db3654d 100644
--- a/fs/btrfs/acl.h
+++ b/fs/btrfs/acl.h
@@ -15,7 +15,7 @@ struct mnt_idmap;
 struct dentry;
 
 struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu);
-int btrfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int btrfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		  struct posix_acl *acl, int type);
 int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode,
 		    struct posix_acl *acl, int type);
diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index 85d3dd48b167..124f07ae5b2d 100644
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -87,7 +87,7 @@ struct posix_acl *ceph_get_acl(struct inode *inode, int type, bool rcu)
 	return acl;
 }
 
-int ceph_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ceph_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	int ret = 0;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index ef9861797eb2..fd603be209e4 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -1252,7 +1252,7 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 
 struct posix_acl *ceph_get_acl(struct inode *, int, bool);
-int ceph_set_acl(struct mnt_idmap *idmap,
+int ceph_set_acl(const struct mnt_idmap *idmap,
 		 struct dentry *dentry, struct posix_acl *acl, int type);
 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
 		       struct ceph_acl_sec_ctx *as_ctx);
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index b9c32e8f855a..1e5146485214 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1097,7 +1097,7 @@ static struct posix_acl *ecryptfs_get_acl(struct mnt_idmap *idmap,
 			   posix_acl_xattr_name(type));
 }
 
-static int ecryptfs_set_acl(struct mnt_idmap *idmap,
+static int ecryptfs_set_acl(const struct mnt_idmap *idmap,
 			    struct dentry *dentry, struct posix_acl *acl,
 			    int type)
 {
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 7e54c31589c7..b2746657fc53 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -219,7 +219,7 @@ __ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
  * inode->i_mutex: down
  */
 int
-ext2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+ext2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	     struct posix_acl *acl, int type)
 {
 	int error;
diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
index 4a8443a2b8ec..e68bc3545608 100644
--- a/fs/ext2/acl.h
+++ b/fs/ext2/acl.h
@@ -56,7 +56,7 @@ static inline int ext2_acl_count(size_t size)
 
 /* acl.c */
 extern struct posix_acl *ext2_get_acl(struct inode *inode, int type, bool rcu);
-extern int ext2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+extern int ext2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 			struct posix_acl *acl, int type);
 extern int ext2_init_acl (struct inode *, struct inode *);
 
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 3bffe862f954..59fac55a2426 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -225,7 +225,7 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 }
 
 int
-ext4_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+ext4_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	     struct posix_acl *acl, int type)
 {
 	handle_t *handle;
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index 0c5a79c3b5d4..a14838c5bc42 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -56,7 +56,7 @@ static inline int ext4_acl_count(size_t size)
 
 /* acl.c */
 struct posix_acl *ext4_get_acl(struct inode *inode, int type, bool rcu);
-int ext4_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ext4_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
 
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index e7e0084d0a5f..22ca39e0aad6 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -289,7 +289,7 @@ static int __f2fs_set_acl(const struct mnt_idmap *idmap,
 	return error;
 }
 
-int f2fs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int f2fs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	struct inode *inode = d_inode(dentry);
diff --git a/fs/f2fs/acl.h b/fs/f2fs/acl.h
index 20e87e63c089..01ec74b6daf2 100644
--- a/fs/f2fs/acl.h
+++ b/fs/f2fs/acl.h
@@ -34,7 +34,7 @@ struct f2fs_acl_header {
 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 
 struct posix_acl *f2fs_get_acl(struct inode *, int, bool);
-int f2fs_set_acl(struct mnt_idmap *, struct dentry *,
+int f2fs_set_acl(const struct mnt_idmap *, struct dentry *,
 			struct posix_acl *, int);
 int f2fs_init_acl(struct inode *, struct inode *, struct folio *ifolio,
 		struct folio *dfolio);
diff --git a/fs/fuse/acl.c b/fs/fuse/acl.c
index 31fb50e16aed..c3813fff4f27 100644
--- a/fs/fuse/acl.c
+++ b/fs/fuse/acl.c
@@ -90,7 +90,7 @@ struct posix_acl *fuse_get_inode_acl(struct inode *inode, int type, bool rcu)
 	return __fuse_get_acl(fc,  inode, type, rcu);
 }
 
-int fuse_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int fuse_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	struct inode *inode = d_inode(dentry);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 6ca56757869c..561ada21ea86 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1207,7 +1207,7 @@ struct posix_acl;
 struct posix_acl *fuse_get_inode_acl(struct inode *inode, int type, bool rcu);
 struct posix_acl *fuse_get_acl(struct mnt_idmap *idmap,
 			       struct dentry *dentry, int type);
-int fuse_set_acl(struct mnt_idmap *, struct dentry *dentry,
+int fuse_set_acl(const struct mnt_idmap *, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 
 /* readdir.c */
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index a5b60778b91c..7b94efbbe8e3 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -102,7 +102,7 @@ int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 	return error;
 }
 
-int gfs2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int gfs2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	struct inode *inode = d_inode(dentry);
diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h
index 82f5b09c04e6..d19d41755936 100644
--- a/fs/gfs2/acl.h
+++ b/fs/gfs2/acl.h
@@ -13,7 +13,7 @@
 
 struct posix_acl *gfs2_get_acl(struct inode *inode, int type, bool rcu);
 int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
-int gfs2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int gfs2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 
 #endif /* __ACL_DOT_H__ */
diff --git a/fs/internal.h b/fs/internal.h
index a502b1fbacd2..8ba0a1613d20 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -302,12 +302,12 @@ int import_xattr_name(struct xattr_name *kname, const char __user *name);
 int may_write_xattr(const struct mnt_idmap *idmap, struct inode *inode);
 
 #ifdef CONFIG_FS_POSIX_ACL
-int do_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int do_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	       const char *acl_name, const void *kvalue, size_t size);
 ssize_t do_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 		   const char *acl_name, void *kvalue, size_t size);
 #else
-static inline int do_set_acl(struct mnt_idmap *idmap,
+static inline int do_set_acl(const struct mnt_idmap *idmap,
 			     struct dentry *dentry, const char *acl_name,
 			     const void *kvalue, size_t size)
 {
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index f0f8a4f57add..7548f44bf327 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -228,7 +228,7 @@ static int __jffs2_set_acl(struct inode *inode, int xprefix, struct posix_acl *a
 	return rc;
 }
 
-int jffs2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int jffs2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		  struct posix_acl *acl, int type)
 {
 	int rc, xprefix;
diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
index e976b8cb82cf..bc5df521633f 100644
--- a/fs/jffs2/acl.h
+++ b/fs/jffs2/acl.h
@@ -28,7 +28,7 @@ struct jffs2_acl_header {
 #ifdef CONFIG_JFFS2_FS_POSIX_ACL
 
 struct posix_acl *jffs2_get_acl(struct inode *inode, int type, bool rcu);
-int jffs2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int jffs2_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		  struct posix_acl *acl, int type);
 extern int jffs2_init_acl_pre(struct inode *, struct inode *, umode_t *);
 extern int jffs2_init_acl_post(struct inode *);
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 16b71a23ff1e..6e0a7feb6c80 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -89,7 +89,7 @@ static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
 	return rc;
 }
 
-int jfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int jfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		struct posix_acl *acl, int type)
 {
 	int rc;
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index f892e54d0fcd..bda26b333519 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -8,7 +8,7 @@
 #ifdef CONFIG_JFS_POSIX_ACL
 
 struct posix_acl *jfs_get_acl(struct inode *inode, int type, bool rcu);
-int jfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int jfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		struct posix_acl *acl, int type);
 int jfs_init_acl(tid_t, struct inode *, struct inode *);
 
diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h
index b333ea119ef5..ffcabadb3546 100644
--- a/fs/nfs/nfs3_fs.h
+++ b/fs/nfs/nfs3_fs.h
@@ -12,7 +12,7 @@
  */
 #ifdef CONFIG_NFS_V3_ACL
 extern struct posix_acl *nfs3_get_acl(struct inode *inode, int type, bool rcu);
-extern int nfs3_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+extern int nfs3_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 			struct posix_acl *acl, int type);
 extern int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 		struct posix_acl *dfacl);
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index a126eb31f62f..2549a1985b9a 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -254,7 +254,7 @@ int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 
 }
 
-int nfs3_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int nfs3_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	struct posix_acl *orig = acl, *dfacl = NULL, *alloc;
diff --git a/fs/ntfs/ea.c b/fs/ntfs/ea.c
index 7fd323912510..063cc15f1626 100644
--- a/fs/ntfs/ea.c
+++ b/fs/ntfs/ea.c
@@ -1080,7 +1080,7 @@ static noinline int ntfs_set_acl_ex(const struct mnt_idmap *idmap,
 	return err;
 }
 
-int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ntfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	return ntfs_set_acl_ex(idmap, d_inode(dentry), acl, type, false);
diff --git a/fs/ntfs/ea.h b/fs/ntfs/ea.h
index 9d17abc2e491..6d98e7487a2c 100644
--- a/fs/ntfs/ea.h
+++ b/fs/ntfs/ea.h
@@ -19,7 +19,7 @@ ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 #ifdef CONFIG_NTFS_FS_POSIX_ACL
 struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 			       int type);
-int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ntfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 int ntfs_init_acl(const struct mnt_idmap *idmap, struct inode *inode,
 		  struct inode *dir);
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index e494bed87679..0a5e81d420f0 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -965,7 +965,7 @@ unsigned long ntfs_names_hash(const u16 *name, size_t len, const u16 *upcase,
 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
 struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 			       int type);
-int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ntfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 int ntfs_init_acl(const struct mnt_idmap *idmap, struct inode *inode,
 		  struct inode *dir);
@@ -974,7 +974,7 @@ int ntfs_init_acl(const struct mnt_idmap *idmap, struct inode *inode,
 #define ntfs_set_acl NULL
 #endif
 
-int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry);
+int ntfs_acl_chmod(const struct mnt_idmap *idmap, struct dentry *dentry);
 ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 extern const struct xattr_handler *const ntfs_xattr_handlers[];
 
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index 5644167de863..2d17b80999ca 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -677,7 +677,7 @@ static noinline int ntfs_set_acl_ex(const struct mnt_idmap *idmap,
 /*
  * ntfs_set_acl - inode_operations::set_acl
  */
-int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ntfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 	return ntfs_set_acl_ex(idmap, d_inode(dentry), acl, type, false);
@@ -722,7 +722,7 @@ int ntfs_init_acl(const struct mnt_idmap *idmap, struct inode *inode,
 /*
  * ntfs_acl_chmod - Helper for ntfs_setattr().
  */
-int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry)
+int ntfs_acl_chmod(const struct mnt_idmap *idmap, struct dentry *dentry)
 {
 	struct inode *inode = d_inode(dentry);
 	struct super_block *sb = inode->i_sb;
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 090ec60fb576..801a2f56ad08 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -260,7 +260,7 @@ static int ocfs2_set_acl(handle_t *handle,
 	return ret;
 }
 
-int ocfs2_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ocfs2_iop_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		      struct posix_acl *acl, int type)
 {
 	struct buffer_head *bh = NULL;
diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h
index a91f9ce278d6..1ed05899cce1 100644
--- a/fs/ocfs2/acl.h
+++ b/fs/ocfs2/acl.h
@@ -17,7 +17,7 @@ struct ocfs2_acl_entry {
 };
 
 struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, bool rcu);
-int ocfs2_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ocfs2_iop_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		      struct posix_acl *acl, int type);
 extern int ocfs2_acl_chmod(struct inode *, struct buffer_head *);
 struct ocfs2_acl_state {
diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c
index a01ef0c1b1bf..f31196e4bfaa 100644
--- a/fs/orangefs/acl.c
+++ b/fs/orangefs/acl.c
@@ -112,7 +112,7 @@ int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 	return error;
 }
 
-int orangefs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int orangefs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		     struct posix_acl *acl, int type)
 {
 	int error;
diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index c582ceffb26e..a5c9e7be4005 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -98,7 +98,7 @@ enum orangefs_vfs_op_states {
 extern const struct xattr_handler * const orangefs_xattr_handlers[];
 
 extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu);
-extern int orangefs_set_acl(struct mnt_idmap *idmap,
+extern int orangefs_set_acl(const struct mnt_idmap *idmap,
 			    struct dentry *dentry, struct posix_acl *acl,
 			    int type);
 int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 5f4e8b6d9722..18e4cbe154cf 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -536,7 +536,7 @@ static int ovl_set_or_remove_acl(struct dentry *dentry, struct inode *inode,
 	return err;
 }
 
-int ovl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ovl_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		struct posix_acl *acl, int type)
 {
 	int err;
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 46a5cf5dae4c..8b335993bf56 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -819,7 +819,7 @@ static inline struct posix_acl *ovl_get_acl(struct mnt_idmap *idmap,
 {
 	return do_ovl_get_acl(idmap, d_inode(dentry), type, false, false);
 }
-int ovl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int ovl_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		struct posix_acl *acl, int type);
 struct posix_acl *ovl_get_acl_path(const struct path *path,
 				   const char *acl_name, bool noperm);
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index b279804ebf56..cec7fb557278 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -608,7 +608,7 @@ EXPORT_SYMBOL(__posix_acl_chmod);
  * performed on the raw inode simply pass @nop_mnt_idmap.
  */
 int
- posix_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry,
+ posix_acl_chmod(const struct mnt_idmap *idmap, struct dentry *dentry,
 		    umode_t mode)
 {
 	struct inode *inode = d_inode(dentry);
@@ -937,7 +937,7 @@ static ssize_t vfs_posix_acl_to_xattr(const struct mnt_idmap *idmap,
 }
 
 int
-set_posix_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+set_posix_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	      int type, struct posix_acl *acl)
 {
 	struct inode *inode = d_inode(dentry);
@@ -1018,7 +1018,7 @@ const struct xattr_handler nop_posix_acl_default = {
 };
 EXPORT_SYMBOL_GPL(nop_posix_acl_default);
 
-int simple_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int simple_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		   struct posix_acl *acl, int type)
 {
 	int error;
@@ -1091,7 +1091,7 @@ static int vfs_set_acl_idmapped_mnt(const struct mnt_idmap *idmap,
  *
  * Return: On success 0, on error negative errno.
  */
-int vfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int vfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		const char *acl_name, struct posix_acl *kacl)
 {
 	int acl_type;
@@ -1212,7 +1212,7 @@ EXPORT_SYMBOL_GPL(vfs_get_acl);
  *
  * Return: On success 0, on error negative errno.
  */
-int vfs_remove_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int vfs_remove_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		   const char *acl_name)
 {
 	int acl_type;
@@ -1265,7 +1265,7 @@ int vfs_remove_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 }
 EXPORT_SYMBOL_GPL(vfs_remove_acl);
 
-int do_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int do_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	       const char *acl_name, const void *kvalue, size_t size)
 {
 	int error;
diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c
index 12005f46307d..0a05b6b0be5f 100644
--- a/fs/smb/client/cifsacl.c
+++ b/fs/smb/client/cifsacl.c
@@ -1931,7 +1931,7 @@ struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap,
 #endif
 }
 
-int cifs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int cifs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type)
 {
 #if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX)
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
index 00168839c123..565697c233a9 100644
--- a/fs/smb/client/cifsproto.h
+++ b/fs/smb/client/cifsproto.h
@@ -214,7 +214,7 @@ struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
 				     u32 *pacllen, u32 info);
 struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 			       int type);
-int cifs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int cifs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		 struct posix_acl *acl, int type);
 int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen, struct inode *inode,
 		 const char *path, int aclflag);
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 3c4d18a4e8d5..75edff8dde31 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -1471,7 +1471,7 @@ struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
 	return dent;
 }
 
-int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap,
+int ksmbd_vfs_remove_acl_xattrs(const struct mnt_idmap *idmap,
 				const struct path *path)
 {
 	char *name, *xattr_list = NULL;
@@ -2200,7 +2200,7 @@ void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock)
 	locks_delete_block(flock);
 }
 
-int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap,
+int ksmbd_vfs_set_init_posix_acl(const struct mnt_idmap *idmap,
 				 const struct path *path)
 {
 	struct posix_acl_state acl_state;
diff --git a/fs/smb/server/vfs.h b/fs/smb/server/vfs.h
index 5e34fc61b48b..67cc48e583c8 100644
--- a/fs/smb/server/vfs.h
+++ b/fs/smb/server/vfs.h
@@ -152,7 +152,7 @@ int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
 				struct ksmbd_kstat *ksmbd_kstat);
 void ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
 void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
-int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap,
+int ksmbd_vfs_remove_acl_xattrs(const struct mnt_idmap *idmap,
 				const struct path *path);
 int ksmbd_vfs_remove_sd_xattrs(const struct mnt_idmap *idmap, const struct path *path);
 int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
@@ -171,7 +171,7 @@ int ksmbd_vfs_set_dos_attrib_xattr(const struct mnt_idmap *idmap,
 int ksmbd_vfs_get_dos_attrib_xattr(const struct mnt_idmap *idmap,
 				   struct dentry *dentry,
 				   struct xattr_dos_attrib *da);
-int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap,
+int ksmbd_vfs_set_init_posix_acl(const struct mnt_idmap *idmap,
 				 const struct path *path);
 int ksmbd_vfs_inherit_posix_acl(const struct mnt_idmap *idmap,
 				const struct path *path,
diff --git a/fs/xattr.c b/fs/xattr.c
index acdaafb0c7c1..758a7ffe3a86 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -652,7 +652,7 @@ int setxattr_copy(const char __user *name, struct kernel_xattr_ctx *ctx)
 	return error;
 }
 
-static int do_setxattr(struct mnt_idmap *idmap, struct dentry *dentry,
+static int do_setxattr(const struct mnt_idmap *idmap, struct dentry *dentry,
 		struct kernel_xattr_ctx *ctx)
 {
 	if (is_posix_acl_xattr(ctx->kname->name))
@@ -1029,7 +1029,7 @@ SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
  * Extended attribute REMOVE operations
  */
 static long
-removexattr(struct mnt_idmap *idmap, struct dentry *d, const char *name)
+removexattr(const struct mnt_idmap *idmap, struct dentry *d, const char *name)
 {
 	if (is_posix_acl_xattr(name))
 		return vfs_remove_acl(idmap, d, name);
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index fdfca6fc75b6..20d87b52c4fc 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -243,7 +243,7 @@ xfs_acl_set_mode(
 }
 
 int
-xfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+xfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 	    struct posix_acl *acl, int type)
 {
 	umode_t mode;
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index bf7f960997d3..183526bec32c 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -11,7 +11,7 @@ struct posix_acl;
 
 #ifdef CONFIG_XFS_POSIX_ACL
 extern struct posix_acl *xfs_get_acl(struct inode *inode, int type, bool rcu);
-extern int xfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+extern int xfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		       struct posix_acl *acl, int type);
 extern int __xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 void xfs_forget_acl(struct inode *inode, const char *name);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index b652f129c85e..25d4d42fbc7f 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -777,7 +777,7 @@ xfs_vn_change_ok(
  */
 static int
 xfs_setattr_nonsize(
-	struct mnt_idmap	*idmap,
+	const struct mnt_idmap	*idmap,
 	struct dentry		*dentry,
 	struct xfs_inode	*ip,
 	struct iattr		*iattr)
@@ -903,7 +903,7 @@ xfs_setattr_nonsize(
  */
 int
 xfs_vn_setattr_size(
-	struct mnt_idmap	*idmap,
+	const struct mnt_idmap	*idmap,
 	struct dentry		*dentry,
 	struct iattr		*iattr)
 {
diff --git a/fs/xfs/xfs_iops.h b/fs/xfs/xfs_iops.h
index 0896f6b8b3b8..328305bba19d 100644
--- a/fs/xfs/xfs_iops.h
+++ b/fs/xfs/xfs_iops.h
@@ -10,7 +10,7 @@ struct xfs_inode;
 
 extern ssize_t xfs_vn_listxattr(struct dentry *, char *data, size_t size);
 
-int xfs_vn_setattr_size(struct mnt_idmap *idmap,
+int xfs_vn_setattr_size(const struct mnt_idmap *idmap,
 		struct dentry *dentry, struct iattr *vap);
 
 int xfs_inode_init_security(struct inode *inode, struct inode *dir,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 764ef2d97a5d..9186d9bb2697 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2028,7 +2028,7 @@ struct inode_operations {
 			struct file *, umode_t);
 	struct posix_acl *(*get_acl)(struct mnt_idmap *, struct dentry *,
 				     int);
-	int (*set_acl)(struct mnt_idmap *, struct dentry *,
+	int (*set_acl)(const struct mnt_idmap *, struct dentry *,
 		       struct posix_acl *, int);
 	int (*fileattr_set)(const struct mnt_idmap *idmap,
 			    struct dentry *dentry, struct file_kattr *fa);
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 7c6cfcae0a9d..9220fe0c965d 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -74,20 +74,20 @@ extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
 extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
 
 extern struct posix_acl *get_posix_acl(struct inode *, int);
-int set_posix_acl(struct mnt_idmap *, struct dentry *, int,
+int set_posix_acl(const struct mnt_idmap *, struct dentry *, int,
 		  struct posix_acl *);
 
 struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type);
 struct posix_acl *posix_acl_clone(const struct posix_acl *acl, gfp_t flags);
 
 #ifdef CONFIG_FS_POSIX_ACL
-int posix_acl_chmod(struct mnt_idmap *, struct dentry *, umode_t);
+int posix_acl_chmod(const struct mnt_idmap *, struct dentry *, umode_t);
 extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
 		struct posix_acl **);
 int posix_acl_update_mode(const struct mnt_idmap *, struct inode *, umode_t *,
 			  struct posix_acl **);
 
-int simple_set_acl(struct mnt_idmap *, struct dentry *,
+int simple_set_acl(const struct mnt_idmap *, struct dentry *,
 		   struct posix_acl *, int);
 extern int simple_acl_create(struct inode *, struct inode *);
 
@@ -105,16 +105,16 @@ static inline void cache_no_acl(struct inode *inode)
 	inode->i_default_acl = NULL;
 }
 
-int vfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int vfs_set_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		const char *acl_name, struct posix_acl *kacl);
 struct posix_acl *vfs_get_acl(struct mnt_idmap *idmap,
 			      struct dentry *dentry, const char *acl_name);
-int vfs_remove_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+int vfs_remove_acl(const struct mnt_idmap *idmap, struct dentry *dentry,
 		   const char *acl_name);
 int posix_acl_listxattr(struct inode *inode, char **buffer,
 			ssize_t *remaining_size);
 #else
-static inline int posix_acl_chmod(struct mnt_idmap *idmap,
+static inline int posix_acl_chmod(const struct mnt_idmap *idmap,
 				  struct dentry *dentry, umode_t mode)
 {
 	return 0;
@@ -141,7 +141,7 @@ static inline void forget_all_cached_acls(struct inode *inode)
 {
 }
 
-static inline int vfs_set_acl(struct mnt_idmap *idmap,
+static inline int vfs_set_acl(const struct mnt_idmap *idmap,
 			      struct dentry *dentry, const char *name,
 			      struct posix_acl *acl)
 {
@@ -155,7 +155,7 @@ static inline struct posix_acl *vfs_get_acl(struct mnt_idmap *idmap,
 	return ERR_PTR(-EOPNOTSUPP);
 }
 
-static inline int vfs_remove_acl(struct mnt_idmap *idmap,
+static inline int vfs_remove_acl(const struct mnt_idmap *idmap,
 				 struct dentry *dentry, const char *acl_name)
 {
 	return -EOPNOTSUPP;