staging: exfat: Use kmemdup in exfat_symlink()

Use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190905030047.88401-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
index 38b5811..da6d3af 100644 (file)
--- a/drivers/staging/exfat/exfat_super.c
+++ b/drivers/staging/exfat/exfat_super.c
@@ -2706,12 +2706,11 @@ static int exfat_symlink(struct inode *dir, struct dentry *dentry,
        inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
        /* timestamp is already written, so mark_inode_dirty() is unneeded. */
 
-       EXFAT_I(inode)->target = kmalloc(len+1, GFP_KERNEL);
+       EXFAT_I(inode)->target = kmemdup(target, len + 1, GFP_KERNEL);
        if (!EXFAT_I(inode)->target) {
                err = -ENOMEM;
                goto out;
        }
-       memcpy(EXFAT_I(inode)->target, target, len+1);
 
        dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
        d_instantiate(dentry, inode);