X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_vfs_single.c;h=32734a68ee21dfeefda42cd86d5056d7fc8cc848;hp=d5b875314005a36afe115ba7abd656bf6b3eff39;hb=6500cebaa2c93512d544719956af259ca13f83b7;hpb=79d0e028d5b777b2e4cf55d96b737cb024988abe

diff --git a/yaffs_vfs_single.c b/yaffs_vfs_single.c
index d5b8753..32734a6 100644
--- a/yaffs_vfs_single.c
+++ b/yaffs_vfs_single.c
@@ -36,7 +36,6 @@
  * a single version and should not include any multi-version code.
  */
 #include <linux/version.h>
-
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -54,30 +53,8 @@
 #include <linux/kthread.h>
 #include <linux/delay.h>
 #include <linux/freezer.h>
-
 #include <asm/div64.h>
-
 #include <linux/statfs.h>
-
-#define UnlockPage(p) unlock_page(p)
-#define Page_Uptodate(page)	test_bit(PG_uptodate, &(page)->flags)
-
-#define yaffs_devname(sb, buf)	bdevname(sb->s_bdev, buf)
-
-#define YPROC_ROOT  NULL
-
-#define Y_INIT_TIMER(a)	init_timer_on_stack(a)
-
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
-
-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-{
-	uint64_t result = partition_size;
-	do_div(result, block_size);
-	return (uint32_t) result;
-}
-
 #include <linux/uaccess.h>
 #include <linux/mtd/mtd.h>
 
@@ -85,9 +62,7 @@ static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
 #include "yaffs_trace.h"
 #include "yaffs_guts.h"
 #include "yaffs_attribs.h"
-
 #include "yaffs_linux.h"
-
 #include "yaffs_mtdif.h"
 #include "yaffs_mtdif1.h"
 #include "yaffs_mtdif2.h"
@@ -105,15 +80,25 @@ module_param(yaffs_auto_checkpoint, uint, 0644);
 module_param(yaffs_gc_control, uint, 0644);
 module_param(yaffs_bg_enable, uint, 0644);
 
+#define yaffs_devname(sb, buf)	bdevname(sb->s_bdev, buf)
+
+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+{
+	uint64_t result = partition_size;
+
+	do_div(result, block_size);
+	return (uint32_t) result;
+}
 
 #define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-#define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
+#define yaffs_inode_to_obj(iptr)\
+	((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
 #define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
 #define yaffs_super_to_dev(sb)	((struct yaffs_dev *)sb->s_fs_info)
 
 #define update_dir_time(dir) do {\
 			(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-		} while(0)
+		} while (0)
 
 
 static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
@@ -159,7 +144,6 @@ static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
 	yaffs_gross_lock(dev);
 
 	obj = yaffs_find_by_number(dev, inode->i_ino);
-
 	yaffs_fill_inode_from_obj(inode, obj);
 
 	yaffs_gross_unlock(dev);
@@ -206,12 +190,9 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 		       dev_t rdev)
 {
 	struct inode *inode;
-
 	struct yaffs_obj *obj = NULL;
 	struct yaffs_dev *dev;
-
 	struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-
 	int error = -ENOSPC;
 	uid_t uid = current->cred->fsuid;
 	gid_t gid =
@@ -220,16 +201,16 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
 		mode |= S_ISGID;
 
-	if (parent) {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_mknod: parent object %d type %d",
-			parent->obj_id, parent->variant_type);
-	} else {
+	if (!parent) {
 		yaffs_trace(YAFFS_TRACE_OS,
 			"yaffs_mknod: could not get parent object");
 		return -EPERM;
 	}
 
+	yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_mknod: parent object %d type %d",
+			parent->obj_id, parent->variant_type);
+
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_mknod: making oject for %s, mode %x dev %x",
 		dentry->d_name.name, mode, rdev);
@@ -265,21 +246,20 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	/* Can not call yaffs_get_inode() with gross lock held */
 	yaffs_gross_unlock(dev);
 
-	if (obj) {
-		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-		d_instantiate(dentry, inode);
-		update_dir_time(dir);
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_mknod created object %d count = %d",
-			obj->obj_id, atomic_read(&inode->i_count));
-		error = 0;
-		yaffs_fill_inode_from_obj(dir, parent);
-	} else {
+	if (!obj) {
 		yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-		error = -ENOMEM;
+		return -ENOMEM;
 	}
 
-	return error;
+	inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+	d_instantiate(dentry, inode);
+	update_dir_time(dir);
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_mknod created object %d count = %d",
+		obj->obj_id, atomic_read(&inode->i_count));
+	yaffs_fill_inode_from_obj(dir, parent);
+
+	return 0;
 }
 
 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
@@ -338,6 +318,7 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
 {
 	struct yaffs_obj *obj;
 	struct yaffs_dev *dev;
+	struct inode *inode;
 	uid_t uid = current->cred->fsuid;
 	gid_t gid =
 	    (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid;
@@ -350,19 +331,17 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
 				   S_IFLNK | S_IRWXUGO, uid, gid, symname);
 	yaffs_gross_unlock(dev);
 
-	if (obj) {
-		struct inode *inode;
-
-		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-		d_instantiate(dentry, inode);
-		update_dir_time(dir);
-		yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-		return 0;
-	} else {
+	if (!obj) {
 		yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
+		return -ENOMEM;
 	}
 
-	return -ENOMEM;
+	inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+	d_instantiate(dentry, inode);
+	update_dir_time(dir);
+	yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
+
+	return 0;
 }
 
 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
@@ -370,7 +349,6 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
 {
 	struct yaffs_obj *obj;
 	struct inode *inode = NULL;
-
 	struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
 
 	if (current != yaffs_dev_to_lc(dev)->readdir_process)
@@ -414,7 +392,6 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
 {
 	int ret_val;
-
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj;
 
@@ -515,6 +492,7 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = dentry->d_inode;
 	int error = 0;
 	struct yaffs_dev *dev;
+	int result;
 
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_setattr of object %d",
@@ -524,17 +502,15 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
 		error = -EINVAL;
 
-	if (error == 0)
+	if (!error)
 		error = inode_change_ok(inode, attr);
-	if (error == 0) {
-		int result;
-		if (!error) {
-			setattr_copy(inode, attr);
-			yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-			if (attr->ia_valid & ATTR_SIZE) {
-				truncate_setsize(inode, attr->ia_size);
-				inode->i_blocks = (inode->i_size + 511) >> 9;
-			}
+
+	if (!error) {
+		setattr_copy(inode, attr);
+		yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
+		if (attr->ia_valid & ATTR_SIZE) {
+			truncate_setsize(inode, attr->ia_size);
+			inode->i_blocks = (inode->i_size + 511) >> 9;
 		}
 		dev = yaffs_inode_to_obj(inode)->my_dev;
 		if (attr->ia_valid & ATTR_SIZE) {
@@ -542,15 +518,12 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 					   (int)(attr->ia_size),
 					   (int)(attr->ia_size));
 		}
+
 		yaffs_gross_lock(dev);
 		result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-		if (result == YAFFS_OK) {
-			error = 0;
-		} else {
+		if (result != YAFFS_OK)
 			error = -EPERM;
-		}
 		yaffs_gross_unlock(dev);
-
 	}
 
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
@@ -563,34 +536,27 @@ static int yaffs_setxattr(struct dentry *dentry, const char *name,
 		   const void *value, size_t size, int flags)
 {
 	struct inode *inode = dentry->d_inode;
-	int error = 0;
+	int error;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
 
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
 
-	if (error == 0) {
-		int result;
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		result = yaffs_set_xattrib(obj, name, value, size, flags);
-		if (result == YAFFS_OK)
-			error = 0;
-		else if (result < 0)
-			error = result;
-		yaffs_gross_unlock(dev);
+	dev = obj->my_dev;
+	yaffs_gross_lock(dev);
+	error = yaffs_set_xattrib(obj, name, value, size, flags);
+	yaffs_gross_unlock(dev);
 
-	}
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
 
 	return error;
 }
 
-static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff,
-		       size_t size)
+static ssize_t yaffs_getxattr(struct dentry *dentry, const char *name,
+				void *buff, size_t size)
 {
 	struct inode *inode = dentry->d_inode;
-	int error = 0;
+	int error;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
 
@@ -598,13 +564,11 @@ static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *bu
 		"yaffs_getxattr \"%s\" from object %d",
 		name, obj->obj_id);
 
-	if (error == 0) {
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		error = yaffs_get_xattrib(obj, name, buff, size);
-		yaffs_gross_unlock(dev);
+	dev = obj->my_dev;
+	yaffs_gross_lock(dev);
+	error = yaffs_get_xattrib(obj, name, buff, size);
+	yaffs_gross_unlock(dev);
 
-	}
 	yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
 
 	return error;
@@ -613,48 +577,39 @@ static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *bu
 static int yaffs_removexattr(struct dentry *dentry, const char *name)
 {
 	struct inode *inode = dentry->d_inode;
-	int error = 0;
+	int error;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
 
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_removexattr of object %d", obj->obj_id);
 
-	if (error == 0) {
-		int result;
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		result = yaffs_remove_xattrib(obj, name);
-		if (result == YAFFS_OK)
-			error = 0;
-		else if (result < 0)
-			error = result;
-		yaffs_gross_unlock(dev);
+	dev = obj->my_dev;
+	yaffs_gross_lock(dev);
+	error = yaffs_remove_xattrib(obj, name);
+	yaffs_gross_unlock(dev);
 
-	}
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_removexattr done returning %d", error);
 
 	return error;
 }
 
-static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
+static ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
 {
 	struct inode *inode = dentry->d_inode;
-	int error = 0;
+	int error;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
 
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_listxattr of object %d", obj->obj_id);
 
-	if (error == 0) {
-		dev = obj->my_dev;
-		yaffs_gross_lock(dev);
-		error = yaffs_list_xattrib(obj, buff, size);
-		yaffs_gross_unlock(dev);
+	dev = obj->my_dev;
+	yaffs_gross_lock(dev);
+	error = yaffs_list_xattrib(obj, buff, size);
+	yaffs_gross_unlock(dev);
 
-	}
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_listxattr done returning %d", error);
 
@@ -718,18 +673,21 @@ static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
 	struct yaffs_dev *dev = dir->my_dev;
 	struct yaffs_search_context *sc =
 	    kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
-	if (sc) {
-		sc->dir_obj = dir;
-		sc->dev = dev;
-		if (list_empty(&sc->dir_obj->variant.dir_variant.children))
-			sc->next_return = NULL;
-		else
-			sc->next_return =
-			    list_entry(dir->variant.dir_variant.children.next,
-				       struct yaffs_obj, siblings);
-		INIT_LIST_HEAD(&sc->others);
-		list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
-	}
+
+	if (!sc)
+		return NULL;
+
+	sc->dir_obj = dir;
+	sc->dev = dev;
+	if (list_empty(&sc->dir_obj->variant.dir_variant.children))
+		sc->next_return = NULL;
+	else
+		sc->next_return =
+		    list_entry(dir->variant.dir_variant.children.next,
+			       struct yaffs_obj, siblings);
+	INIT_LIST_HEAD(&sc->others);
+	list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
+
 	return sc;
 }
 
@@ -786,11 +744,9 @@ static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
 	 * the search context to the next object to prevent a hanging pointer.
 	 */
 	list_for_each(i, search_contexts) {
-		if (i) {
-			sc = list_entry(i, struct yaffs_search_context, others);
-			if (sc->next_return == obj)
-				yaffs_search_advance(sc);
-		}
+		sc = list_entry(i, struct yaffs_search_context, others);
+		if (sc->next_return == obj)
+			yaffs_search_advance(sc);
 	}
 
 }
@@ -804,7 +760,6 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 	unsigned long offset, curoffs;
 	struct yaffs_obj *l;
 	int ret_val = 0;
-
 	char name[YAFFS_MAX_NAME_LENGTH + 1];
 
 	obj = yaffs_dentry_to_obj(f->f_dentry);
@@ -914,11 +869,10 @@ static const struct file_operations yaffs_dir_operations = {
 static int yaffs_file_flush(struct file *file, fl_owner_t id)
 {
 	struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-
 	struct yaffs_dev *dev = obj->my_dev;
 
 	yaffs_trace(YAFFS_TRACE_OS,
-	  	"yaffs_file_flush object %d (%s)",
+		"yaffs_file_flush object %d (%s)",
 		obj->obj_id, obj->dirty ? "dirty" : "clean");
 
 	yaffs_gross_lock(dev);
@@ -996,7 +950,6 @@ struct dentry *yaffs2_get_parent(struct dentry *dentry)
 			}
 		}
 	}
-
 	return parent;
 }
 
@@ -1018,7 +971,6 @@ static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
 {
 	unsigned char *alias;
 	int ret;
-
 	struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -1132,7 +1084,6 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 	struct yaffs_obj *obj;
 	unsigned char *pg_buf;
 	int ret;
-
 	struct yaffs_dev *dev;
 
 	yaffs_trace(YAFFS_TRACE_OS,
@@ -1177,7 +1128,8 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
 {
 	int ret = yaffs_readpage_nolock(f, pg);
-	UnlockPage(pg);
+
+	unlock_page(pg);
 	return ret;
 }
 
@@ -1273,18 +1225,17 @@ static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
 	return (n_written == n_bytes) ? 0 : -ENOSPC;
 }
 
-/* Space holding and freeing is done to ensure we have space available for 
+/* Space holding and freeing is done to ensure we have space available for
  * write_begin/end.
  * For now we just assume few parallel writes and check against a small
  * number.
- * Todo: need to do this with a counter to handle parallel reads better.
+ * Todo: need to do this with a counter to handle parallel reads better
  */
 
 static ssize_t yaffs_hold_space(struct file *f)
 {
 	struct yaffs_obj *obj;
 	struct yaffs_dev *dev;
-
 	int n_free_chunks;
 
 	obj = yaffs_dentry_to_obj(f->f_dentry);
@@ -1320,7 +1271,6 @@ static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
 {
 	struct page *pg = NULL;
 	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-
 	int ret = 0;
 	int space_held = 0;
 
@@ -1334,7 +1284,7 @@ static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
 	}
 	yaffs_trace(YAFFS_TRACE_OS,
 		"start yaffs_write_begin index %d(%x) uptodate %d",
-		(int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
+		(int)index, (int)index, PageUptodate(pg) ? 1 : 0);
 
 	/* Get fs space */
 	space_held = yaffs_hold_space(filp);
@@ -1346,7 +1296,7 @@ static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
 
 	/* Update page if required */
 
-	if (!Page_Uptodate(pg))
+	if (!PageUptodate(pg))
 		ret = yaffs_readpage_nolock(filp, pg);
 
 	if (ret)
@@ -1370,7 +1320,7 @@ out:
 }
 
 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-				loff_t * pos)
+				loff_t *pos)
 {
 	struct yaffs_obj *obj;
 	int n_written, ipos;
@@ -1379,6 +1329,13 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 
 	obj = yaffs_dentry_to_obj(f->f_dentry);
 
+	if (!obj) {
+		/* This should not happen */
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_file_write: hey obj is null!");
+		return -EINVAL;
+	}
+
 	dev = obj->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -1390,13 +1347,9 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	else
 		ipos = *pos;
 
-	if (!obj)
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_file_write: hey obj is null!");
-	else
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)",
-			(unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos);
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)",
+		(unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos);
 
 	n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
 
@@ -1417,7 +1370,6 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 				"yaffs_file_write size updated to %d bytes, %d blocks",
 				ipos, (int)(inode->i_blocks));
 		}
-
 	}
 	yaffs_gross_unlock(dev);
 	return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
@@ -1476,11 +1428,12 @@ static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 
 		bytes_in_dev =
 		    ((uint64_t)
-		     ((dev->param.end_block - dev->param.start_block +
-		       1))) * ((uint64_t) (dev->param.chunks_per_block *
+		     ((dev->param.end_block - dev->param.start_block + 1))) *
+		     ((uint64_t) (dev->param.chunks_per_block *
 					   dev->data_bytes_per_chunk));
 
-		do_div(bytes_in_dev, sb->s_blocksize);	/* bytes_in_dev becomes the number of blocks */
+		do_div(bytes_in_dev, sb->s_blocksize);
+			/* bytes_in_dev becomes the number of blocks */
 		buf->f_blocks = bytes_in_dev;
 
 		bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
@@ -1536,6 +1489,7 @@ static void yaffs_flush_inodes(struct super_block *sb)
 static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
 {
 	struct yaffs_dev *dev = yaffs_super_to_dev(sb);
+
 	if (!dev)
 		return;
 
@@ -1604,7 +1558,7 @@ static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
  * yaffs_bg_start() launches the background thread.
  * yaffs_bg_stop() cleans up the background thread.
  *
- * NB: 
+ * NB:
  * The thread should only run after the yaffs is initialised
  * The thread should be stopped before yaffs is unmounted.
  * The thread should not do any writing while the fs is in read only.
@@ -1624,7 +1578,6 @@ static int yaffs_bg_thread_fn(void *data)
 	unsigned long next_gc = now;
 	unsigned long expires;
 	unsigned int urgency;
-
 	int gc_result;
 	struct timer_list timer;
 
@@ -1661,12 +1614,12 @@ static int yaffs_bg_thread_fn(void *data)
 				else
 					next_gc = now + HZ * 2;
 			} else	{
-			        /*
+				/*
 				 * gc not running so set to next_dir_update
 				 * to cut down on wake ups
 				 */
 				next_gc = next_dir_update;
-                        }
+			}
 		}
 		yaffs_gross_unlock(dev);
 		expires = next_dir_update;
@@ -1675,7 +1628,7 @@ static int yaffs_bg_thread_fn(void *data)
 		if (time_before(expires, now))
 			expires = now + HZ;
 
-		Y_INIT_TIMER(&timer);
+		init_timer_on_stack(&timer);
 		timer.expires = expires + 1;
 		timer.data = (unsigned long)current;
 		timer.function = yaffs_background_waker;
@@ -1747,12 +1700,9 @@ static int yaffs_sync_fs(struct super_block *sb, int wait)
 	return 0;
 }
 
-
 static LIST_HEAD(yaffs_context_list);
 struct mutex yaffs_context_lock;
 
-
-
 struct yaffs_options {
 	int inband_tags;
 	int skip_checkpoint_read;
@@ -1768,7 +1718,7 @@ struct yaffs_options {
 
 #define MAX_OPT_LEN 30
 static int yaffs_parse_options(struct yaffs_options *options,
-			       const char *options_str)
+				const char *options_str)
 {
 	char cur_opt[MAX_OPT_LEN + 1];
 	int p;
@@ -1826,11 +1776,10 @@ static int yaffs_parse_options(struct yaffs_options *options,
 			error = 1;
 		}
 	}
-
 	return error;
 }
 
-static struct address_space_operations yaffs_file_address_operations = {
+static const struct address_space_operations yaffs_file_address_operations = {
 	.readpage = yaffs_readpage,
 	.writepage = yaffs_writepage,
 	.write_begin = yaffs_write_begin,
@@ -1865,93 +1814,86 @@ static const struct inode_operations yaffs_symlink_inode_operations = {
 static void yaffs_fill_inode_from_obj(struct inode *inode,
 				      struct yaffs_obj *obj)
 {
-	if (inode && obj) {
-
-		/* Check mode against the variant type and attempt to repair if broken. */
-		u32 mode = obj->yst_mode;
-		switch (obj->variant_type) {
-		case YAFFS_OBJECT_TYPE_FILE:
-			if (!S_ISREG(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFREG;
-			}
-
-			break;
-		case YAFFS_OBJECT_TYPE_SYMLINK:
-			if (!S_ISLNK(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFLNK;
-			}
+	if (!inode || !obj)  {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_fill_inode invalid parameters");
+		return;
+	}
 
-			break;
-		case YAFFS_OBJECT_TYPE_DIRECTORY:
-			if (!S_ISDIR(mode)) {
-				obj->yst_mode &= ~S_IFMT;
-				obj->yst_mode |= S_IFDIR;
-			}
+	/* Check mode against the variant type
+	 * and attempt to repair if broken. */
+	u32 mode = obj->yst_mode;
 
-			break;
-		case YAFFS_OBJECT_TYPE_UNKNOWN:
-		case YAFFS_OBJECT_TYPE_HARDLINK:
-		case YAFFS_OBJECT_TYPE_SPECIAL:
-		default:
-			/* TODO? */
-			break;
+	switch (obj->variant_type) {
+	case YAFFS_OBJECT_TYPE_FILE:
+		if (!S_ISREG(mode)) {
+			obj->yst_mode &= ~S_IFMT;
+			obj->yst_mode |= S_IFREG;
 		}
-
-		inode->i_flags |= S_NOATIME;
-
-		inode->i_ino = obj->obj_id;
-		inode->i_mode = obj->yst_mode;
-		inode->i_uid = obj->yst_uid;
-		inode->i_gid = obj->yst_gid;
-
-		inode->i_rdev = old_decode_dev(obj->yst_rdev);
-
-		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-		inode->i_atime.tv_nsec = 0;
-		inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-		inode->i_mtime.tv_nsec = 0;
-		inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-		inode->i_ctime.tv_nsec = 0;
-		inode->i_size = yaffs_get_obj_length(obj);
-		inode->i_blocks = (inode->i_size + 511) >> 9;
-
-		inode->i_nlink = yaffs_get_obj_link_count(obj);
-
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_fill_inode mode %x uid %d gid %d size %d count %d",
-			inode->i_mode, inode->i_uid, inode->i_gid,
-			(int)inode->i_size, atomic_read(&inode->i_count));
-
-		switch (obj->yst_mode & S_IFMT) {
-		default:	/* fifo, device or socket */
-			init_special_inode(inode, obj->yst_mode,
-					   old_decode_dev(obj->yst_rdev));
-			break;
-		case S_IFREG:	/* file */
-			inode->i_op = &yaffs_file_inode_operations;
-			inode->i_fop = &yaffs_file_operations;
-			inode->i_mapping->a_ops =
-			    &yaffs_file_address_operations;
-			break;
-		case S_IFDIR:	/* directory */
-			inode->i_op = &yaffs_dir_inode_operations;
-			inode->i_fop = &yaffs_dir_operations;
-			break;
-		case S_IFLNK:	/* symlink */
-			inode->i_op = &yaffs_symlink_inode_operations;
-			break;
+		break;
+	case YAFFS_OBJECT_TYPE_SYMLINK:
+		if (!S_ISLNK(mode)) {
+			obj->yst_mode &= ~S_IFMT;
+			obj->yst_mode |= S_IFLNK;
+		}
+		break;
+	case YAFFS_OBJECT_TYPE_DIRECTORY:
+		if (!S_ISDIR(mode)) {
+			obj->yst_mode &= ~S_IFMT;
+			obj->yst_mode |= S_IFDIR;
 		}
+		break;
+	case YAFFS_OBJECT_TYPE_UNKNOWN:
+	case YAFFS_OBJECT_TYPE_HARDLINK:
+	case YAFFS_OBJECT_TYPE_SPECIAL:
+	default:
+		/* TODO? */
+		break;
+	}
 
-		yaffs_inode_to_obj_lv(inode) = obj;
+	inode->i_flags |= S_NOATIME;
+	inode->i_ino = obj->obj_id;
+	inode->i_mode = obj->yst_mode;
+	inode->i_uid = obj->yst_uid;
+	inode->i_gid = obj->yst_gid;
 
-		obj->my_inode = inode;
+	inode->i_rdev = old_decode_dev(obj->yst_rdev);
 
-	} else {
-		yaffs_trace(YAFFS_TRACE_OS,
-			"yaffs_fill_inode invalid parameters");
+	inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+	inode->i_atime.tv_nsec = 0;
+	inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+	inode->i_mtime.tv_nsec = 0;
+	inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+	inode->i_ctime.tv_nsec = 0;
+	inode->i_size = yaffs_get_obj_length(obj);
+	inode->i_blocks = (inode->i_size + 511) >> 9;
+	inode->i_nlink = yaffs_get_obj_link_count(obj);
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_fill_inode mode %x uid %d gid %d size %d count %d",
+		inode->i_mode, inode->i_uid, inode->i_gid,
+		(int)inode->i_size, atomic_read(&inode->i_count));
+
+	switch (obj->yst_mode & S_IFMT) {
+	default:	/* fifo, device or socket */
+		init_special_inode(inode, obj->yst_mode,
+				   old_decode_dev(obj->yst_rdev));
+		break;
+	case S_IFREG:	/* file */
+		inode->i_op = &yaffs_file_inode_operations;
+		inode->i_fop = &yaffs_file_operations;
+		inode->i_mapping->a_ops = &yaffs_file_address_operations;
+		break;
+	case S_IFDIR:	/* directory */
+		inode->i_op = &yaffs_dir_inode_operations;
+		inode->i_fop = &yaffs_dir_operations;
+		break;
+	case S_IFLNK:	/* symlink */
+		inode->i_op = &yaffs_symlink_inode_operations;
+		break;
 	}
+
+	yaffs_inode_to_obj_lv(inode) = obj;
+	obj->my_inode = inode;
 }
 
 static void yaffs_put_super(struct super_block *sb)
@@ -2020,16 +1962,18 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	char *data_str = (char *)data;
 	struct yaffs_linux_context *context = NULL;
 	struct yaffs_param *param;
-
 	int read_only = 0;
-
 	struct yaffs_options options;
-
 	unsigned mount_id;
 	int found;
 	struct yaffs_linux_context *context_iterator;
 	struct list_head *l;
 
+	if (!sb) {
+		printk(KERN_INFO "yaffs: sb is NULL\n");
+		return NULL;
+	}
+
 	sb->s_magic = YAFFS_MAGIC;
 	sb->s_op = &yaffs_super_ops;
 	sb->s_flags |= MS_NOATIME;
@@ -2038,9 +1982,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	sb->s_export_op = &yaffs_export_ops;
 
-	if (!sb)
-		printk(KERN_INFO "yaffs: sb is NULL\n");
-	else if (!sb->s_dev)
+	if (!sb->s_dev)
 		printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
 	else if (!yaffs_devname(sb, devname_buf))
 		printk(KERN_INFO "yaffs: devname is NULL\n");
@@ -2056,10 +1998,9 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	memset(&options, 0, sizeof(options));
 
-	if (yaffs_parse_options(&options, data_str)) {
+	if (yaffs_parse_options(&options, data_str))
 		/* Option parsing failed */
 		return NULL;
-	}
 
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
@@ -2101,21 +2042,21 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob);
 	yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad);
 	yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad);
-	yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
+	yaffs_trace(YAFFS_TRACE_OS, " writesize %d", mtd->writesize);
 	yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
 	yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
 	yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
 
 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
 
-	if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
+	if (yaffs_version == 1 && mtd->writesize >= 2048) {
 		yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
 		yaffs_version = 2;
 	}
 
 	/* Added NCB 26/5/2006 for completeness */
-	if (yaffs_version == 2 && !options.inband_tags
-	    && WRITE_SIZE(mtd) == 512) {
+	if (yaffs_version == 2 && !options.inband_tags &&
+		mtd->writesize == 512) {
 		yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
 		yaffs_version = 1;
 	}
@@ -2133,7 +2074,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 			return NULL;
 		}
 
-		if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+		if ((mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
 		     mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
 		    !options.inband_tags) {
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
@@ -2150,7 +2091,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 			return NULL;
 		}
 
-		if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+		if (mtd->writesize < YAFFS_BYTES_PER_CHUNK ||
 		    mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
 			yaffs_trace(YAFFS_TRACE_ALWAYS,
 				"MTD device does not support have the right page sizes");
@@ -2174,10 +2115,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 	context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
 
 	if (!dev || !context) {
-		if (dev)
-			kfree(dev);
-		if (context)
-			kfree(context);
+		kfree(dev);
+		kfree(context);
 		dev = NULL;
 		context = NULL;
 	}
@@ -2262,8 +2201,8 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 		param->read_chunk_tags_fn = nandmtd2_read_chunk_tags;
 		param->bad_block_fn = nandmtd2_mark_block_bad;
 		param->query_block_fn = nandmtd2_query_block;
-		yaffs_dev_to_lc(dev)->spare_buffer = 
-		                kmalloc(mtd->oobsize, GFP_NOFS);
+		yaffs_dev_to_lc(dev)->spare_buffer =
+				kmalloc(mtd->oobsize, GFP_NOFS);
 		param->is_yaffs2 = 1;
 		param->total_bytes_per_chunk = mtd->writesize;
 		param->chunks_per_block = mtd->erasesize / mtd->writesize;
@@ -2299,13 +2238,12 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	mutex_lock(&yaffs_context_lock);
 	/* Get a mount id */
-	found = 0;
-	for (mount_id = 0; !found; mount_id++) {
+	for (mount_id = 0, found = 0; !found; mount_id++) {
 		found = 1;
 		list_for_each(l, &yaffs_context_list) {
 			context_iterator =
-			    list_entry(l, struct yaffs_linux_context,
-				       context_list);
+				list_entry(l, struct yaffs_linux_context,
+					context_list);
 			if (context_iterator->mount_id == mount_id)
 				found = 0;
 		}
@@ -2422,6 +2360,7 @@ static struct proc_dir_entry *my_proc_entry;
 static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
 {
 	struct yaffs_param *param = &dev->param;
+
 	buf += sprintf(buf, "start_block........... %d\n", param->start_block);
 	buf += sprintf(buf, "end_block............. %d\n", param->end_block);
 	buf += sprintf(buf, "total_bytes_per_chunk. %d\n",
@@ -2523,7 +2462,8 @@ static int yaffs_proc_read(char *page,
 
 		mutex_lock(&yaffs_context_lock);
 
-		/* Locate and print the Nth entry.  Order N-squared but N is small. */
+		/* Locate and print the Nth entry.
+		 * Order N-squared but N is small. */
 		list_for_each(item, &yaffs_context_list) {
 			struct yaffs_linux_context *dc =
 			    list_entry(item, struct yaffs_linux_context,
@@ -2541,7 +2481,7 @@ static int yaffs_proc_read(char *page,
 				buf = yaffs_dump_dev_part0(buf, dev);
 			} else {
 				buf = yaffs_dump_dev_part1(buf, dev);
-                        }
+			}
 
 			break;
 		}
@@ -2562,7 +2502,7 @@ static struct {
 	char *mask_name;
 	unsigned mask_bitfield;
 } mask_flags[] = {
-	{"allocate", YAFFS_TRACE_ALLOCATE}, 
+	{"allocate", YAFFS_TRACE_ALLOCATE},
 	{"always", YAFFS_TRACE_ALWAYS},
 	{"background", YAFFS_TRACE_BACKGROUND},
 	{"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
@@ -2725,7 +2665,7 @@ static int __init init_yaffs_fs(void)
 
 	/* Install the proc_fs entries */
 	my_proc_entry = create_proc_entry("yaffs",
-					  S_IRUGO | S_IFREG, YPROC_ROOT);
+					  S_IRUGO | S_IFREG, NULL);
 
 	if (my_proc_entry) {
 		my_proc_entry->write_proc = yaffs_proc_write;
@@ -2733,7 +2673,7 @@ static int __init init_yaffs_fs(void)
 		my_proc_entry->data = NULL;
 	} else {
 		return -ENOMEM;
-        }
+	}
 
 
 	/* Now add the file system entries */
@@ -2771,7 +2711,7 @@ static void __exit exit_yaffs_fs(void)
 	yaffs_trace(YAFFS_TRACE_ALWAYS,
 		"yaffs built " __DATE__ " " __TIME__ " removing.");
 
-	remove_proc_entry("yaffs", YPROC_ROOT);
+	remove_proc_entry("yaffs", NULL);
 
 	fsinst = fs_to_install;
 
@@ -2785,8 +2725,8 @@ static void __exit exit_yaffs_fs(void)
 }
 
 module_init(init_yaffs_fs)
-    module_exit(exit_yaffs_fs)
+module_exit(exit_yaffs_fs)
 
-    MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
 MODULE_LICENSE("GPL");