write_iter variants of {__,}generic_file_aio_write()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 47e0597..b9b5f97 100644 (file)
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -763,7 +763,7 @@ err_out:
 
 buff_write:
        mutex_unlock(&inode->i_mutex);
-       return do_sync_write(filp, data, count, offsetp);
+       return new_sync_write(filp, data, count, offsetp);
 }
 
 /**
@@ -781,7 +781,7 @@ v9fs_cached_file_write(struct file *filp, const char __user * data,
 
        if (filp->f_flags & O_DIRECT)
                return v9fs_direct_write(filp, data, count, offset);
-       return do_sync_write(filp, data, count, offset);
+       return new_sync_write(filp, data, count, offset);
 }
 
 
@@ -851,7 +851,7 @@ const struct file_operations v9fs_cached_file_operations = {
        .read = v9fs_cached_file_read,
        .write = v9fs_cached_file_write,
        .read_iter = generic_file_read_iter,
-       .aio_write = generic_file_aio_write,
+       .write_iter = generic_file_write_iter,
        .open = v9fs_file_open,
        .release = v9fs_dir_release,
        .lock = v9fs_file_lock,
@@ -864,7 +864,7 @@ const struct file_operations v9fs_cached_file_operations_dotl = {
        .read = v9fs_cached_file_read,
        .write = v9fs_cached_file_write,
        .read_iter = generic_file_read_iter,
-       .aio_write = generic_file_aio_write,
+       .write_iter = generic_file_write_iter,
        .open = v9fs_file_open,
        .release = v9fs_dir_release,
        .lock = v9fs_file_lock_dotl,

diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index 3bfc9ef..07c9edc 100644 (file)
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -27,8 +27,8 @@ const struct file_operations adfs_file_operations = {
        .read_iter      = generic_file_read_iter,
        .mmap           = generic_file_mmap,
        .fsync          = generic_file_fsync,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .splice_read    = generic_file_splice_read,
 };
 

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 982853f..9df2317 100644 (file)
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -29,8 +29,8 @@ const struct file_operations affs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .open           = affs_file_open,
        .release        = affs_file_release,

diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index 0aa7888..e7f88ac 100644 (file)
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -25,8 +25,8 @@ const struct file_operations bfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .splice_read    = generic_file_splice_read,
 };

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index b32827c..db0fad3 100644 (file)
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -353,8 +353,8 @@ const struct file_operations ecryptfs_main_fops = {
        .llseek = generic_file_llseek,
        .read = new_sync_read,
        .read_iter = ecryptfs_read_update_atime,
-       .write = do_sync_write,
-       .aio_write = generic_file_aio_write,
+       .write = new_sync_write,
+       .write_iter = generic_file_write_iter,
        .iterate = ecryptfs_readdir,
        .unlocked_ioctl = ecryptfs_unlocked_ioctl,
 #ifdef CONFIG_COMPAT

diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index 90d394d..5b7f6be 100644 (file)
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -68,9 +68,9 @@ static int exofs_flush(struct file *file, fl_owner_t id)
 const struct file_operations exofs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .open           = generic_file_open,
        .release        = exofs_release_file,

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 4073050..970c6ac 100644 (file)
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -63,9 +63,9 @@ int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 const struct file_operations ext2_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .unlocked_ioctl = ext2_ioctl,
 #ifdef CONFIG_COMPAT
        .compat_ioctl   = ext2_compat_ioctl,

diff --git a/fs/ext3/file.c b/fs/ext3/file.c
index 5439d2f..c833b12 100644 (file)
--- a/fs/ext3/file.c
+++ b/fs/ext3/file.c
@@ -51,9 +51,9 @@ static int ext3_release_file (struct inode * inode, struct file * filp)
 const struct file_operations ext3_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .unlocked_ioctl = ext3_ioctl,
 #ifdef CONFIG_COMPAT
        .compat_ioctl   = ext3_compat_ioctl,

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0e01fb0..22f4900 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -680,9 +680,9 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 const struct file_operations f2fs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .open           = generic_file_open,
        .mmap           = f2fs_file_mmap,
        .fsync          = f2fs_sync_file,

diff --git a/fs/fat/file.c b/fs/fat/file.c
index 29285e9..85f79a8 100644 (file)
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -171,9 +171,9 @@ int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 const struct file_operations fat_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .release        = fat_file_release,
        .unlocked_ioctl = fat_generic_ioctl,

diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 6d4055a..d0929bc 100644 (file)
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -676,8 +676,8 @@ static const struct file_operations hfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .splice_read    = generic_file_splice_read,
        .fsync          = hfs_file_fsync,

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index cccc89e..0cf786f 100644 (file)
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -343,8 +343,8 @@ static const struct file_operations hfsplus_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .splice_read    = generic_file_splice_read,
        .fsync          = hfsplus_file_fsync,

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index ce0005d..bb529f3 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -381,8 +381,8 @@ static const struct file_operations hostfs_file_fops = {
        .read           = new_sync_read,
        .splice_read    = generic_file_splice_read,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
-       .write          = do_sync_write,
+       .write_iter     = generic_file_write_iter,
+       .write          = new_sync_write,
        .mmap           = generic_file_mmap,
        .open           = hostfs_file_open,
        .release        = hostfs_file_release,

diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index bacb478..7f54e5f 100644 (file)
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -199,8 +199,8 @@ const struct file_operations hpfs_file_ops =
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .release        = hpfs_file_release,
        .fsync          = hpfs_file_fsync,

diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 9192127..64989ca 100644 (file)
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -53,8 +53,8 @@ const struct file_operations jffs2_file_operations =
        .open =         generic_file_open,
        .read =         new_sync_read,
        .read_iter =    generic_file_read_iter,
-       .write =        do_sync_write,
-       .aio_write =    generic_file_aio_write,
+       .write =        new_sync_write,
+       .write_iter =   generic_file_write_iter,
        .unlocked_ioctl=jffs2_ioctl,
        .mmap =         generic_file_readonly_mmap,
        .fsync =        jffs2_fsync,

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index a5d8299..cc744ec 100644 (file)
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -151,10 +151,10 @@ const struct inode_operations jfs_file_inode_operations = {
 const struct file_operations jfs_file_operations = {
        .open           = jfs_open,
        .llseek         = generic_file_llseek,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .splice_read    = generic_file_splice_read,
        .splice_write   = generic_file_splice_write,

diff --git a/fs/logfs/file.c b/fs/logfs/file.c
index 1ca8026..8538752 100644 (file)
--- a/fs/logfs/file.c
+++ b/fs/logfs/file.c
@@ -265,14 +265,14 @@ const struct inode_operations logfs_reg_iops = {
 
 const struct file_operations logfs_reg_fops = {
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .fsync          = logfs_fsync,
        .unlocked_ioctl = logfs_ioctl,
        .llseek         = generic_file_llseek,
        .mmap           = generic_file_readonly_mmap,
        .open           = generic_file_open,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
 };
 
 const struct address_space_operations logfs_reg_aops = {

diff --git a/fs/minix/file.c b/fs/minix/file.c
index 607b471..a967de0 100644 (file)
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -16,8 +16,8 @@ const struct file_operations minix_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .fsync          = generic_file_fsync,
        .splice_read    = generic_file_splice_read,

diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index dcb1b0e..2497815 100644 (file)
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -153,9 +153,9 @@ static int nilfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 const struct file_operations nilfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = generic_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .unlocked_ioctl = nilfs_ioctl,
 #ifdef CONFIG_COMPAT
        .compat_ioctl   = nilfs_compat_ioctl,

diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index 3bf28da..902e885 100644 (file)
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -338,9 +338,9 @@ static sector_t omfs_bmap(struct address_space *mapping, sector_t block)
 const struct file_operations omfs_file_operations = {
        .llseek = generic_file_llseek,
        .read = new_sync_read,
-       .write = do_sync_write,
+       .write = new_sync_write,
        .read_iter = generic_file_read_iter,
-       .aio_write = generic_file_aio_write,
+       .write_iter = generic_file_write_iter,
        .mmap = generic_file_mmap,
        .fsync = generic_file_fsync,
        .splice_read = generic_file_splice_read,

diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 30ffb36..6ea0b97 100644 (file)
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -33,8 +33,8 @@
 const struct file_operations ramfs_file_operations = {
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .fsync          = noop_fsync,
        .splice_read    = generic_file_splice_read,

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 416db04..9ed420f 100644 (file)
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -39,8 +39,8 @@ const struct file_operations ramfs_file_operations = {
        .get_unmapped_area      = ramfs_nommu_get_unmapped_area,
        .read                   = new_sync_read,
        .read_iter              = generic_file_read_iter,
-       .write                  = do_sync_write,
-       .aio_write              = generic_file_aio_write,
+       .write                  = new_sync_write,
+       .write_iter             = generic_file_write_iter,
        .fsync                  = noop_fsync,
        .splice_read            = generic_file_splice_read,
        .splice_write           = generic_file_splice_write,

diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 7592d68..7c8ecd6 100644 (file)
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -236,7 +236,7 @@ int reiserfs_commit_page(struct inode *inode, struct page *page,
 
 const struct file_operations reiserfs_file_operations = {
        .read = new_sync_read,
-       .write = do_sync_write,
+       .write = new_sync_write,
        .unlocked_ioctl = reiserfs_ioctl,
 #ifdef CONFIG_COMPAT
        .compat_ioctl = reiserfs_compat_ioctl,
@@ -246,7 +246,7 @@ const struct file_operations reiserfs_file_operations = {
        .release = reiserfs_file_release,
        .fsync = reiserfs_sync_file,
        .read_iter = generic_file_read_iter,
-       .aio_write = generic_file_aio_write,
+       .write_iter = generic_file_write_iter,
        .splice_read = generic_file_splice_read,
        .splice_write = generic_file_splice_write,
        .llseek = generic_file_llseek,

diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index d99be88..b00811c 100644 (file)
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -23,8 +23,8 @@ const struct file_operations sysv_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .fsync          = generic_file_fsync,
        .splice_read    = generic_file_splice_read,

diff --git a/fs/ufs/file.c b/fs/ufs/file.c
index b6b4029..c84ec01 100644 (file)
--- a/fs/ufs/file.c
+++ b/fs/ufs/file.c
@@ -37,8 +37,8 @@ const struct file_operations ufs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = new_sync_read,
        .read_iter      = generic_file_read_iter,
-       .write          = do_sync_write,
-       .aio_write      = generic_file_aio_write,
+       .write          = new_sync_write,
+       .write_iter     = generic_file_write_iter,
        .mmap           = generic_file_mmap,
        .open           = generic_file_open,
        .fsync          = generic_file_fsync,

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17535e0..4b22163 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2414,7 +2414,9 @@ int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isbl
 extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
 extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long);
+extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *, loff_t);
 extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
 extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);

diff --git a/mm/filemap.c b/mm/filemap.c
index c0404b7..d2d9eee 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2542,10 +2542,9 @@ again:
 EXPORT_SYMBOL(generic_perform_write);
 
 /**
- * __generic_file_aio_write - write data to a file
+ * __generic_file_write_iter - write data to a file
  * @iocb:      IO state structure (file, offset, etc.)
- * @iov:       vector with data to write
- * @nr_segs:   number of segments in the vector
+ * @from:      iov_iter with data to write
  *
  * This function does all the work needed for actually writing data to a
  * file. It does all basic checks, removes SUID from the file, updates
@@ -2559,21 +2558,16 @@ EXPORT_SYMBOL(generic_perform_write);
  * A caller has to handle it. This is mainly due to the fact that we want to
  * avoid syncing under i_mutex.
  */
-ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
-                                unsigned long nr_segs)
+ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
        struct file *file = iocb->ki_filp;
        struct address_space * mapping = file->f_mapping;
-       size_t count;           /* after file limit checks */
        struct inode    *inode = mapping->host;
        loff_t          pos = iocb->ki_pos;
        ssize_t         written = 0;
        ssize_t         err;
        ssize_t         status;
-       struct iov_iter from;
-
-       count = iov_length(iov, nr_segs);
-       iov_iter_init(&from, WRITE, iov, nr_segs, count);
+       size_t          count = iov_iter_count(from);
 
        /* We can write back this queue in page reclaim */
        current->backing_dev_info = mapping->backing_dev_info;
@@ -2584,7 +2578,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
        if (count == 0)
                goto out;
 
-       iov_iter_truncate(&from, count);
+       iov_iter_truncate(from, count);
 
        err = file_remove_suid(file);
        if (err)
@@ -2598,7 +2592,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
        if (unlikely(file->f_flags & O_DIRECT)) {
                loff_t endbyte;
 
-               written = generic_file_direct_write(iocb, &from, pos);
+               written = generic_file_direct_write(iocb, from, pos);
                if (written < 0 || written == count)
                        goto out;
 
@@ -2609,7 +2603,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
                pos += written;
                count -= written;
 
-               status = generic_perform_write(file, &from, pos);
+               status = generic_perform_write(file, from, pos);
                /*
                 * If generic_perform_write() returned a synchronous error
                 * then we want to return the number of bytes which were
@@ -2641,7 +2635,7 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
                         */
                }
        } else {
-               written = generic_perform_write(file, &from, pos);
+               written = generic_perform_write(file, from, pos);
                if (likely(written >= 0))
                        iocb->ki_pos = pos + written;
        }
@@ -2649,30 +2643,36 @@ out:
        current->backing_dev_info = NULL;
        return written ? written : err;
 }
+EXPORT_SYMBOL(__generic_file_write_iter);
+
+ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+                                unsigned long nr_segs)
+{
+       size_t count = iov_length(iov, nr_segs);
+       struct iov_iter from;
+
+       iov_iter_init(&from, WRITE, iov, nr_segs, count);
+       return __generic_file_write_iter(iocb, &from);
+}
 EXPORT_SYMBOL(__generic_file_aio_write);
 
 /**
- * generic_file_aio_write - write data to a file
+ * generic_file_write_iter - write data to a file
  * @iocb:      IO state structure
- * @iov:       vector with data to write
- * @nr_segs:   number of segments in the vector
- * @pos:       position in file where to write
+ * @from:      iov_iter with data to write
  *
- * This is a wrapper around __generic_file_aio_write() to be used by most
+ * This is a wrapper around __generic_file_write_iter() to be used by most
  * filesystems. It takes care of syncing the file in case of O_SYNC file
  * and acquires i_mutex as needed.
  */
-ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
-               unsigned long nr_segs, loff_t pos)
+ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
        struct file *file = iocb->ki_filp;
        struct inode *inode = file->f_mapping->host;
        ssize_t ret;
 
-       BUG_ON(iocb->ki_pos != pos);
-
        mutex_lock(&inode->i_mutex);
-       ret = __generic_file_aio_write(iocb, iov, nr_segs);
+       ret = __generic_file_write_iter(iocb, from);
        mutex_unlock(&inode->i_mutex);
 
        if (ret > 0) {
@@ -2684,6 +2684,19 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
        }
        return ret;
 }
+EXPORT_SYMBOL(generic_file_write_iter);
+
+ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+               unsigned long nr_segs, loff_t pos)
+{
+       size_t count = iov_length(iov, nr_segs);
+       struct iov_iter from;
+
+       BUG_ON(iocb->ki_pos != pos);
+
+       iov_iter_init(&from, WRITE, iov, nr_segs, count);
+       return generic_file_write_iter(iocb, &from);
+}
 EXPORT_SYMBOL(generic_file_aio_write);
 
 /**

diff --git a/mm/shmem.c b/mm/shmem.c
index edc6c7e..d3e5c6f 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2618,9 +2618,9 @@ static const struct file_operations shmem_file_operations = {
 #ifdef CONFIG_TMPFS
        .llseek         = shmem_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = shmem_file_read_iter,
-       .aio_write      = generic_file_aio_write,
+       .write_iter     = generic_file_write_iter,
        .fsync          = noop_fsync,
        .splice_read    = shmem_file_splice_read,
        .splice_write   = generic_file_splice_write,

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 32c661d..9c2dba6 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -458,7 +458,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
         * stalls if we need to run get_block().  We could test
         * PagePrivate for that.
         *
-        * If this process is currently in __generic_file_aio_write() against
+        * If this process is currently in __generic_file_write_iter() against
         * this page's queue, we can perform writeback even if that
         * will block.
         *