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>

2 files changed, 5 insertions, 3 deletions

diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 50020501c5eb..4884ac5ae9be 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 869f2d80183d..d532c20fc179 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;