fs: convert simple fs to new truncate

Convert simple filesystems: ramfs, configfs, sysfs, block_dev to new truncate
sequence.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

5 files changed, 15 insertions, 19 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index d0b37e626a1..7346c96308a 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -172,8 +172,9 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
         struct file *file = iocb->ki_filp;
         struct inode *inode = file->f_mapping->host;
 
-        return blockdev_direct_IO_no_locking(rw, iocb, inode, I_BDEV(inode),
-                                iov, offset, nr_segs, blkdev_get_blocks, NULL);
+        return blockdev_direct_IO_no_locking_newtrunc(rw, iocb, inode,
+                                I_BDEV(inode), iov, offset, nr_segs,
+                                blkdev_get_blocks, NULL);
 }
 
 int __sync_blockdev(struct block_device *bdev, int wait)
@@ -309,8 +310,8 @@ static int blkdev_write_begin(struct file *file, struct address_space *mapping,
                         struct page **pagep, void **fsdata)
 {
         *pagep = NULL;
-        return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-                                blkdev_get_block);
+        return block_write_begin_newtrunc(file, mapping, pos, len, flags,
+                                pagep, fsdata, blkdev_get_block);
 }
 
 static int blkdev_write_end(struct file *file, struct address_space *mapping,
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index c8af2d91174..41645142b88 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -72,16 +72,11 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
         if (!sd)
                 return -EINVAL;
 
-        sd_iattr = sd->s_iattr;
-
-        error = inode_change_ok(inode, iattr);
-        if (error)
-                return error;
-
-        error = inode_setattr(inode, iattr);
+        error = simple_setattr(dentry, iattr);
         if (error)
                 return error;
 
+        sd_iattr = sd->s_iattr;
         if (!sd_iattr) {
                 /* setting attributes for the first time, allocate now */
                 sd_iattr = kzalloc(sizeof(struct iattr), GFP_KERNEL);
diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 50020501c5e..4884ac5ae9b 100644
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -50,5 +50,6 @@ const struct file_operations ramfs_file_operations = {
 };
 
 const struct inode_operations ramfs_file_inode_operations = {
+        .setattr        = simple_setattr,
         .getattr        = simple_getattr,
 };
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 869f2d80183..d532c20fc17 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -146,7 +146,7 @@ static int ramfs_nommu_resize(struct inode *inode, loff_t newsize, loff_t size)
                         return ret;
         }
 
-        ret = vmtruncate(inode, newsize);
+        ret = simple_setsize(inode, newsize);
 
         return ret;
 }
@@ -169,7 +169,8 @@ static int ramfs_nommu_setattr(struct dentry *dentry, struct iattr *ia)
 
         /* pick out size-changing events */
         if (ia->ia_valid & ATTR_SIZE) {
-                loff_t size = i_size_read(inode);
+                loff_t size = inode->i_size;
+
                 if (ia->ia_size != size) {
                         ret = ramfs_nommu_resize(inode, ia->ia_size, size);
                         if (ret < 0 || ia->ia_valid == ATTR_SIZE)
@@ -182,7 +183,7 @@ static int ramfs_nommu_setattr(struct dentry *dentry, struct iattr *ia)
                 }
         }
 
-        ret = inode_setattr(inode, ia);
+        generic_setattr(inode, ia);
  out:
         ia->ia_valid = old_ia_valid;
         return ret;
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index bbd77e95cf7..bde1a4c3679 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -117,13 +117,11 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
         if (error)
                 goto out;
 
-        iattr->ia_valid &= ~ATTR_SIZE; /* ignore size changes */
-
-        error = inode_setattr(inode, iattr);
-        if (error)
-                goto out;
+        /* this ignores size changes */
+        generic_setattr(inode, iattr);
 
         error = sysfs_sd_setattr(sd, iattr);
+
 out:
         mutex_unlock(&sysfs_mutex);
         return error;