kernel-5.15/aufs-k510.diff

diff --git a/fs/aufs/branch.h b/fs/aufs/branch.h
index 594c8bd674b2..82c24958edd8 100644
--- a/fs/aufs/branch.h
+++ b/fs/aufs/branch.h
@@ -241,10 +241,8 @@ int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 		 ino_t *ino);
 int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 		  ino_t ino);
-ssize_t xino_fread(vfs_readf_t func, struct file *file, void *buf, size_t size,
-		   loff_t *pos);
-ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
-		    size_t size, loff_t *pos);
+ssize_t xino_fread(struct file *file, void *buf, size_t size, loff_t *pos);
+ssize_t xino_fwrite(struct file *file, void *buf, size_t size, loff_t *pos);
 
 int au_xib_trunc(struct super_block *sb);
 int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex, int idx_begin);
diff --git a/fs/aufs/cpup.c b/fs/aufs/cpup.c
index 492442339b6c..50141f5a45f9 100644
--- a/fs/aufs/cpup.c
+++ b/fs/aufs/cpup.c
@@ -569,32 +569,19 @@ static int au_do_cpup_regular(struct au_cp_generic *cpg,
 static int au_do_cpup_symlink(struct path *h_path, struct dentry *h_src,
 			      struct inode *h_dir)
 {
-	int err, symlen;
-	mm_segment_t old_fs;
-	union {
-		char *k;
-		char __user *u;
-	} sym;
+	int err;
+	DEFINE_DELAYED_CALL(done);
+	const char *sym;
 
-	err = -ENOMEM;
-	sym.k = (void *)__get_free_page(GFP_NOFS);
-	if (unlikely(!sym.k))
+	sym = vfs_get_link(h_src, &done);
+	err = PTR_ERR(sym);
+	if (IS_ERR(sym))
 		goto out;
 
-	/* unnecessary to support mmap_sem since symlink is not mmap-able */
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	symlen = vfs_readlink(h_src, sym.u, PATH_MAX);
-	err = symlen;
-	set_fs(old_fs);
-
-	if (symlen > 0) {
-		sym.k[symlen] = 0;
-		err = vfsub_symlink(h_dir, h_path, sym.k);
-	}
-	free_page((unsigned long)sym.k);
+	err = vfsub_symlink(h_dir, h_path, sym);
 
 out:
+	do_delayed_call(&done);
 	return err;
 }
 
diff --git a/fs/aufs/dynop.c b/fs/aufs/dynop.c
index 837f94d49f74..4732edb340d7 100644
--- a/fs/aufs/dynop.c
+++ b/fs/aufs/dynop.c
@@ -180,6 +180,7 @@ static void dy_aop(struct au_dykey *key, const void *h_op,
 	DySetAop(writepages);
 	DySetAop(set_page_dirty);
 	DySetAop(readpages);
+	DySetAop(readahead);
 	DySetAop(write_begin);
 	DySetAop(write_end);
 	DySetAop(bmap);
diff --git a/fs/aufs/export.c b/fs/aufs/export.c
index 842df6f05517..f883d2bf5325 100644
--- a/fs/aufs/export.c
+++ b/fs/aufs/export.c
@@ -121,8 +121,7 @@ void au_xigen_inc(struct inode *inode)
 	pos = inode->i_ino;
 	pos *= sizeof(igen);
 	igen = inode->i_generation + 1;
-	sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xigen, &igen,
-			 sizeof(igen), &pos);
+	sz = xino_fwrite(sbinfo->si_xigen, &igen, sizeof(igen), &pos);
 	if (sz == sizeof(igen))
 		return; /* success */
 
@@ -164,10 +163,10 @@ int au_xigen_new(struct inode *inode)
 	if (vfsub_f_size_read(file)
 	    < pos + sizeof(inode->i_generation)) {
 		inode->i_generation = atomic_inc_return(&sbinfo->si_xigen_next);
-		sz = xino_fwrite(sbinfo->si_xwrite, file, &inode->i_generation,
+		sz = xino_fwrite(file, &inode->i_generation,
 				 sizeof(inode->i_generation), &pos);
 	} else
-		sz = xino_fread(sbinfo->si_xread, file, &inode->i_generation,
+		sz = xino_fread(file, &inode->i_generation,
 				sizeof(inode->i_generation), &pos);
 	if (sz == sizeof(inode->i_generation))
 		goto out; /* success */
diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
index 9894e2124bd5..37eb4f6bcc23 100644
--- a/fs/aufs/f_op.c
+++ b/fs/aufs/f_op.c
@@ -242,34 +242,6 @@ static void au_write_post(struct inode *inode, struct file *h_file,
 	fput(h_file);
 }
 
-static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
-			 loff_t *ppos)
-{
-	ssize_t err;
-	struct inode *inode;
-	struct file *h_file;
-	struct super_block *sb;
-
-	inode = file_inode(file);
-	sb = inode->i_sb;
-	si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-
-	h_file = au_read_pre(file, /*keep_fi*/0, /*lsc*/0);
-	err = PTR_ERR(h_file);
-	if (IS_ERR(h_file))
-		goto out;
-
-	/* filedata may be obsoleted by concurrent copyup, but no problem */
-	err = vfsub_read_u(h_file, buf, count, ppos);
-	/* todo: necessary? */
-	/* file->f_ra = h_file->f_ra; */
-	au_read_post(inode, h_file);
-
-out:
-	si_read_unlock(sb);
-	return err;
-}
-
 /*
  * todo: very ugly
  * it locks both of i_mutex and si_rwsem for read in safe.
@@ -292,33 +264,6 @@ static void au_mtx_and_read_lock(struct inode *inode)
 	}
 }
 
-static ssize_t aufs_write(struct file *file, const char __user *ubuf,
-			  size_t count, loff_t *ppos)
-{
-	ssize_t err;
-	struct au_write_pre wpre;
-	struct inode *inode;
-	struct file *h_file;
-	char __user *buf = (char __user *)ubuf;
-
-	inode = file_inode(file);
-	au_mtx_and_read_lock(inode);
-
-	wpre.lsc = 0;
-	h_file = au_write_pre(file, /*do_ready*/1, &wpre);
-	err = PTR_ERR(h_file);
-	if (IS_ERR(h_file))
-		goto out;
-
-	err = vfsub_write_u(h_file, buf, count, ppos);
-	au_write_post(inode, h_file, &wpre, err);
-
-out:
-	si_read_unlock(inode->i_sb);
-	inode_unlock(inode);
-	return err;
-}
-
 static ssize_t au_do_iter(struct file *h_file, int rw, struct kiocb *kio,
 			  struct iov_iter *iov_iter)
 {
@@ -788,8 +733,6 @@ const struct file_operations aufs_file_fop = {
 
 	.llseek		= default_llseek,
 
-	.read		= aufs_read,
-	.write		= aufs_write,
 	.read_iter	= aufs_read_iter,
 	.write_iter	= aufs_write_iter,
 
diff --git a/fs/aufs/file.c b/fs/aufs/file.c
index b0075b57d8bc..53d0f16c3bab 100644
--- a/fs/aufs/file.c
+++ b/fs/aufs/file.c
@@ -790,6 +790,10 @@ static ssize_t aufs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 
 /* they will never be called. */
 #ifdef CONFIG_AUFS_DEBUG
+/*
+void aufs_readahead(struct readahead_control *)
+{ AuUnsupport(); }
+*/
 static int aufs_write_begin(struct file *file, struct address_space *mapping,
 			    loff_t pos, unsigned len, unsigned flags,
 			    struct page **pagep, void **fsdata)
diff --git a/fs/aufs/hfsnotify.c b/fs/aufs/hfsnotify.c
index cb4eeb1e6069..d0abe8ac783f 100644
--- a/fs/aufs/hfsnotify.c
+++ b/fs/aufs/hfsnotify.c
@@ -160,8 +160,8 @@ static void au_hfsn_free_group(struct fsnotify_group *group)
 }
 
 static int au_hfsn_handle_event(struct fsnotify_group *group,
-				struct inode *inode,
 				u32 mask, const void *data, int data_type,
+				struct inode *dir,
 				const struct qstr *file_name, u32 cookie,
 				struct fsnotify_iter_info *iter_info)
 {
@@ -178,7 +178,7 @@ static int au_hfsn_handle_event(struct fsnotify_group *group,
 	if (mask & (FS_IN_IGNORED | FS_UNMOUNT))
 		goto out;
 
-	h_dir = inode;
+	h_dir = dir;
 	h_inode = NULL;
 #ifdef AuDbgHnotify
 	au_debug_on();
diff --git a/fs/aufs/super.h b/fs/aufs/super.h
index c0cb0051242c..4638331366b7 100644
--- a/fs/aufs/super.h
+++ b/fs/aufs/super.h
@@ -131,8 +131,6 @@ struct au_sbinfo {
 	unsigned int		si_mntflags;
 
 	/* external inode number (bitmap and translation table) */
-	vfs_readf_t		si_xread;
-	vfs_writef_t		si_xwrite;
 	loff_t			si_ximaxent;	/* max entries in a xino */
 
 	struct file		*si_xib;
diff --git a/fs/aufs/vfsub.c b/fs/aufs/vfsub.c
index a5e10c5c004f..de875cd4eedc 100644
--- a/fs/aufs/vfsub.c
+++ b/fs/aufs/vfsub.c
@@ -513,22 +513,17 @@ ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
 	return err;
 }
 
-/* todo: kernel_read()? */
 ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count,
 		     loff_t *ppos)
 {
 	ssize_t err;
-	mm_segment_t oldfs;
-	union {
-		void *k;
-		char __user *u;
-	} buf;
-
-	buf.k = kbuf;
-	oldfs = get_fs();
-	set_fs(KERNEL_DS);
-	err = vfsub_read_u(file, buf.u, count, ppos);
-	set_fs(oldfs);
+
+	lockdep_off();
+	err = kernel_read(file, kbuf, count, ppos);
+	lockdep_on();
+	AuTraceErr(err);
+	if (err >= 0)
+		vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
 	return err;
 }
 
@@ -548,17 +543,12 @@ ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
 ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos)
 {
 	ssize_t err;
-	mm_segment_t oldfs;
-	union {
-		void *k;
-		const char __user *u;
-	} buf;
-
-	buf.k = kbuf;
-	oldfs = get_fs();
-	set_fs(KERNEL_DS);
-	err = vfsub_write_u(file, buf.u, count, ppos);
-	set_fs(oldfs);
+
+	lockdep_off();
+	err = kernel_write(file, kbuf, count, ppos);
+	lockdep_on();
+	if (err >= 0)
+		vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
 	return err;
 }
 
diff --git a/fs/aufs/xino.c b/fs/aufs/xino.c
index b3152c0ce0b5..ae7bd07b022d 100644
--- a/fs/aufs/xino.c
+++ b/fs/aufs/xino.c
@@ -660,8 +660,8 @@ struct au_xi_writing {
 	ino_t h_ino, ino;
 };
 
-static int au_xino_do_write(vfs_writef_t write, struct file *file,
-			    struct au_xi_calc *calc, ino_t ino);
+static int au_xino_do_write(struct file *file, struct au_xi_calc *calc,
+			    ino_t ino);
 
 static void au_xino_call_do_new_async(void *args)
 {
@@ -690,7 +690,7 @@ static void au_xino_call_do_new_async(void *args)
 
 	file = au_xino_file(br->br_xino, a->calc.idx);
 	AuDebugOn(!file);
-	err = au_xino_do_write(sbi->si_xwrite, file, &a->calc, a->ino);
+	err = au_xino_do_write(file, &a->calc, a->ino);
 	if (unlikely(err)) {
 		AuIOErr("err %d\n", err);
 		goto out;
@@ -791,7 +791,7 @@ int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 		return 0; /* no xino */
 
 	sbinfo = au_sbi(sb);
-	sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &calc.pos);
+	sz = xino_fread(file, ino, sizeof(*ino), &calc.pos);
 	if (sz == sizeof(*ino))
 		return 0; /* success */
 
@@ -803,12 +803,12 @@ int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 	return err;
 }
 
-static int au_xino_do_write(vfs_writef_t write, struct file *file,
-			    struct au_xi_calc *calc, ino_t ino)
+static int au_xino_do_write(struct file *file, struct au_xi_calc *calc,
+			    ino_t ino)
 {
 	ssize_t sz;
 
-	sz = xino_fwrite(write, file, &ino, sizeof(ino), &calc->pos);
+	sz = xino_fwrite(file, &ino, sizeof(ino), &calc->pos);
 	if (sz == sizeof(ino))
 		return 0; /* success */
 
@@ -858,7 +858,7 @@ int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 		goto out;
 	}
 
-	err = au_xino_do_write(au_sbi(sb)->si_xwrite, file, &calc, ino);
+	err = au_xino_do_write(file, &calc, ino);
 	if (!err) {
 		br = au_sbr(sb, bindex);
 		if (au_opt_test(mnt_flags, TRUNC_XINO)
@@ -872,40 +872,27 @@ int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
 	return -EIO;
 }
 
-static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
-			      size_t size, loff_t *pos);
+static ssize_t xino_fread_wkq(struct file *file, void *buf, size_t size,
+			      loff_t *pos);
 
 /* todo: unnecessary to support mmap_sem since kernel-space? */
-ssize_t xino_fread(vfs_readf_t func, struct file *file, void *kbuf, size_t size,
-		   loff_t *pos)
+ssize_t xino_fread(struct file *file, void *kbuf, size_t size, loff_t *pos)
 {
 	ssize_t err;
-	mm_segment_t oldfs;
-	union {
-		void *k;
-		char __user *u;
-	} buf;
 	int i;
 	const int prevent_endless = 10;
 
 	i = 0;
-	buf.k = kbuf;
-	oldfs = get_fs();
-	set_fs(KERNEL_DS);
 	do {
-		err = func(file, buf.u, size, pos);
+		err = vfsub_read_k(file, kbuf, size, pos);
 		if (err == -EINTR
 		    && !au_wkq_test()
 		    && fatal_signal_pending(current)) {
-			set_fs(oldfs);
-			err = xino_fread_wkq(func, file, kbuf, size, pos);
+			err = xino_fread_wkq(file, kbuf, size, pos);
 			BUG_ON(err == -EINTR);
-			oldfs = get_fs();
-			set_fs(KERNEL_DS);
 		}
 	} while (i++ < prevent_endless
 		 && (err == -EAGAIN || err == -EINTR));
-	set_fs(oldfs);
 
 #if 0 /* reserved for future use */
 	if (err > 0)
@@ -917,7 +904,6 @@ ssize_t xino_fread(vfs_readf_t func, struct file *file, void *kbuf, size_t size,
 
 struct xino_fread_args {
 	ssize_t *errp;
-	vfs_readf_t func;
 	struct file *file;
 	void *buf;
 	size_t size;
@@ -927,17 +913,16 @@ struct xino_fread_args {
 static void call_xino_fread(void *args)
 {
 	struct xino_fread_args *a = args;
-	*a->errp = xino_fread(a->func, a->file, a->buf, a->size, a->pos);
+	*a->errp = xino_fread(a->file, a->buf, a->size, a->pos);
 }
 
-static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
-			      size_t size, loff_t *pos)
+static ssize_t xino_fread_wkq(struct file *file, void *buf, size_t size,
+			      loff_t *pos)
 {
 	ssize_t err;
 	int wkq_err;
 	struct xino_fread_args args = {
 		.errp	= &err,
-		.func	= func,
 		.file	= file,
 		.buf	= buf,
 		.size	= size,
@@ -951,39 +936,27 @@ static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
 	return err;
 }
 
-static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-			       size_t size, loff_t *pos);
+static ssize_t xino_fwrite_wkq(struct file *file, void *buf, size_t size,
+			       loff_t *pos);
 
-static ssize_t do_xino_fwrite(vfs_writef_t func, struct file *file, void *kbuf,
-			      size_t size, loff_t *pos)
+static ssize_t do_xino_fwrite(struct file *file, void *kbuf, size_t size,
+			      loff_t *pos)
 {
 	ssize_t err;
-	mm_segment_t oldfs;
-	union {
-		void *k;
-		const char __user *u;
-	} buf;
 	int i;
 	const int prevent_endless = 10;
 
 	i = 0;
-	buf.k = kbuf;
-	oldfs = get_fs();
-	set_fs(KERNEL_DS);
 	do {
-		err = func(file, buf.u, size, pos);
+		err = vfsub_write_k(file, kbuf, size, pos);
 		if (err == -EINTR
 		    && !au_wkq_test()
 		    && fatal_signal_pending(current)) {
-			set_fs(oldfs);
-			err = xino_fwrite_wkq(func, file, kbuf, size, pos);
+			err = xino_fwrite_wkq(file, kbuf, size, pos);
 			BUG_ON(err == -EINTR);
-			oldfs = get_fs();
-			set_fs(KERNEL_DS);
 		}
 	} while (i++ < prevent_endless
 		 && (err == -EAGAIN || err == -EINTR));
-	set_fs(oldfs);
 
 #if 0 /* reserved for future use */
 	if (err > 0)
@@ -995,7 +968,6 @@ static ssize_t do_xino_fwrite(vfs_writef_t func, struct file *file, void *kbuf,
 
 struct do_xino_fwrite_args {
 	ssize_t *errp;
-	vfs_writef_t func;
 	struct file *file;
 	void *buf;
 	size_t size;
@@ -1005,17 +977,16 @@ struct do_xino_fwrite_args {
 static void call_do_xino_fwrite(void *args)
 {
 	struct do_xino_fwrite_args *a = args;
-	*a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
+	*a->errp = do_xino_fwrite(a->file, a->buf, a->size, a->pos);
 }
 
-static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-			       size_t size, loff_t *pos)
+static ssize_t xino_fwrite_wkq(struct file *file, void *buf, size_t size,
+			       loff_t *pos)
 {
 	ssize_t err;
 	int wkq_err;
 	struct do_xino_fwrite_args args = {
 		.errp	= &err,
-		.func	= func,
 		.file	= file,
 		.buf	= buf,
 		.size	= size,
@@ -1033,18 +1004,17 @@ static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
 	return err;
 }
 
-ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
-		    size_t size, loff_t *pos)
+ssize_t xino_fwrite(struct file *file, void *buf, size_t size, loff_t *pos)
 {
 	ssize_t err;
 
 	if (rlimit(RLIMIT_FSIZE) == RLIM_INFINITY) {
 		lockdep_off();
-		err = do_xino_fwrite(func, file, buf, size, pos);
+		err = do_xino_fwrite(file, buf, size, pos);
 		lockdep_on();
 	} else {
 		lockdep_off();
-		err = xino_fwrite_wkq(func, file, buf, size, pos);
+		err = xino_fwrite_wkq(file, buf, size, pos);
 		lockdep_on();
 	}
 
@@ -1095,17 +1065,17 @@ static int xib_pindex(struct super_block *sb, unsigned long pindex)
 	p = sbinfo->si_xib_buf;
 	pos = sbinfo->si_xib_last_pindex;
 	pos *= PAGE_SIZE;
-	sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
+	sz = xino_fwrite(xib, p, PAGE_SIZE, &pos);
 	if (unlikely(sz != PAGE_SIZE))
 		goto out;
 
 	pos = pindex;
 	pos *= PAGE_SIZE;
 	if (vfsub_f_size_read(xib) >= pos + PAGE_SIZE)
-		sz = xino_fread(sbinfo->si_xread, xib, p, PAGE_SIZE, &pos);
+		sz = xino_fread(xib, p, PAGE_SIZE, &pos);
 	else {
 		memset(p, 0, PAGE_SIZE);
-		sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
+		sz = xino_fwrite(xib, p, PAGE_SIZE, &pos);
 	}
 	if (sz == PAGE_SIZE) {
 		sbinfo->si_xib_last_pindex = pindex;
@@ -1156,7 +1126,6 @@ static int do_xib_restore(struct super_block *sb, struct file *file, void *page)
 	unsigned long pindex;
 	loff_t pos, pend;
 	struct au_sbinfo *sbinfo;
-	vfs_readf_t func;
 	ino_t *ino;
 	unsigned long *p;
 
@@ -1164,11 +1133,10 @@ static int do_xib_restore(struct super_block *sb, struct file *file, void *page)
 	sbinfo = au_sbi(sb);
 	MtxMustLock(&sbinfo->si_xib_mtx);
 	p = sbinfo->si_xib_buf;
-	func = sbinfo->si_xread;
 	pend = vfsub_f_size_read(file);
 	pos = 0;
 	while (pos < pend) {
-		sz = xino_fread(func, file, page, PAGE_SIZE, &pos);
+		sz = xino_fread(file, page, PAGE_SIZE, &pos);
 		err = sz;
 		if (unlikely(sz <= 0))
 			goto out;
@@ -1257,7 +1225,7 @@ int au_xib_trunc(struct super_block *sb)
 	p = sbinfo->si_xib_buf;
 	memset(p, 0, PAGE_SIZE);
 	pos = 0;
-	sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xib, p, PAGE_SIZE, &pos);
+	sz = xino_fwrite(sbinfo->si_xib, p, PAGE_SIZE, &pos);
 	if (unlikely(sz != PAGE_SIZE)) {
 		err = sz;
 		AuIOErr("err %d\n", err);
@@ -1396,7 +1364,6 @@ static void xino_clear_xib(struct super_block *sb)
 	SiMustWriteLock(sb);
 
 	sbinfo = au_sbi(sb);
-	/* unnecessary to clear sbinfo->si_xread and ->si_xwrite */
 	if (sbinfo->si_xib)
 		fput(sbinfo->si_xib);
 	sbinfo->si_xib = NULL;
@@ -1423,8 +1390,6 @@ static int au_xino_set_xib(struct super_block *sb, struct path *path)
 	if (sbinfo->si_xib)
 		fput(sbinfo->si_xib);
 	sbinfo->si_xib = file;
-	sbinfo->si_xread = vfs_readf(file);
-	sbinfo->si_xwrite = vfs_writef(file);
 	xi_sb = file_inode(file)->i_sb;
 	sbinfo->si_ximaxent = xi_sb->s_maxbytes;
 	if (unlikely(sbinfo->si_ximaxent < PAGE_SIZE)) {
@@ -1445,8 +1410,7 @@ static int au_xino_set_xib(struct super_block *sb, struct path *path)
 	sbinfo->si_xib_next_bit = 0;
 	if (vfsub_f_size_read(file) < PAGE_SIZE) {
 		pos = 0;
-		err = xino_fwrite(sbinfo->si_xwrite, file, sbinfo->si_xib_buf,
-				  PAGE_SIZE, &pos);
+		err = xino_fwrite(file, sbinfo->si_xib_buf, PAGE_SIZE, &pos);
 		if (unlikely(err != PAGE_SIZE))
 			goto out_free;
 	}
@@ -1497,7 +1461,6 @@ static void au_xino_set_br_shared(struct super_block *sb, struct au_branch *br,
 }
 
 struct au_xino_do_set_br {
-	vfs_writef_t writef;
 	struct au_branch *br;
 	ino_t h_ino;
 	aufs_bindex_t bshared;
@@ -1539,7 +1502,7 @@ static int au_xino_do_set_br(struct super_block *sb, struct path *path,
 		goto out;
 	AuDebugOn(!file);
 
-	err = au_xino_do_write(args->writef, file, &calc, AUFS_ROOT_INO);
+	err = au_xino_do_write(file, &calc, AUFS_ROOT_INO);
 	if (unlikely(err))
 		au_xino_put(br);
 
@@ -1559,7 +1522,6 @@ static int au_xino_set_br(struct super_block *sb, struct path *path)
 
 	bbot = au_sbbot(sb);
 	inode = d_inode(sb->s_root);
-	args.writef = au_sbi(sb)->si_xwrite;
 	for (bindex = 0; bindex <= bbot; bindex++) {
 		args.h_ino = au_h_iptr(inode, bindex)->i_ino;
 		args.br = au_sbr(sb, bindex);
@@ -1714,7 +1676,6 @@ int au_xino_init_br(struct super_block *sb, struct au_branch *br, ino_t h_ino,
 		.br	= br
 	};
 
-	args.writef = au_sbi(sb)->si_xwrite;
 	args.bshared = sbr_find_shared(sb, /*btop*/0, au_sbbot(sb),
 				       au_br_sb(br));
 	err = au_xino_do_set_br(sb, base, &args);
@@ -1798,7 +1759,6 @@ void au_xino_delete_inode(struct inode *inode, const int unlinked)
 	struct au_hinode *hi;
 	struct inode *h_inode;
 	struct au_branch *br;
-	vfs_writef_t xwrite;
 	struct au_xi_calc calc;
 	struct file *file;
 
@@ -1820,7 +1780,6 @@ void au_xino_delete_inode(struct inode *inode, const int unlinked)
 	if (bindex < 0)
 		return;
 
-	xwrite = au_sbi(sb)->si_xwrite;
 	try_trunc = !!au_opt_test(mnt_flags, TRUNC_XINO);
 	hi = au_hinode(iinfo, bindex);
 	bbot = iinfo->ii_bbot;
@@ -1841,7 +1800,7 @@ void au_xino_delete_inode(struct inode *inode, const int unlinked)
 		if (IS_ERR_OR_NULL(file))
 			continue;
 
-		err = au_xino_do_write(xwrite, file, &calc, /*ino*/0);
+		err = au_xino_do_write(file, &calc, /*ino*/0);
 		if (!err && try_trunc
 		    && au_test_fs_trunc_xino(au_br_sb(br)))
 			xino_try_trunc(sb, br);