Oct 17 2010

jffs2: use kmemdup 

Author: Julia Lawall <julia@diku.dk>

Convert a sequence of kmalloc and memcpy to use kmemdup.

The semantic patch that performs this transformation is:
(http://coccinelle.lip6.fr/)

// 
@@
expression a,flag,len;
expression arg,e1,e2;
statement S;
@@

  a =
-  \(kmalloc\|kzalloc\)(len,flag)
+  kmemdup(arg,len,flag)
  <... when != a
  if (a == NULL || ...) S
  ...>
- memcpy(a,arg,len+1);
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse 

---
 fs/jffs2/dir.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index ed78a3cf3..dd745c3 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -367,7 +367,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
 	}
 
 	/* We use f->target field to store the target path. */
-	f->target = kmalloc(targetlen + 1, GFP_KERNEL);
+	f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
 	if (!f->target) {
 		printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
 		mutex_unlock(&f->sem);
@@ -376,7 +376,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
 		goto fail;
 	}
 
-	memcpy(f->target, target, targetlen + 1);
 	D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
 
 	/* No data here. Only a metadata node, which will be

qlambert