[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/efs/symlink.c b/src/kernel/linux/v4.14/fs/efs/symlink.c
new file mode 100644
index 0000000..923eb91
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/efs/symlink.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * symlink.c
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ */
+
+#include <linux/string.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+#include "efs.h"
+
+static int efs_symlink_readpage(struct file *file, struct page *page)
+{
+ char *link = page_address(page);
+ struct buffer_head * bh;
+ struct inode * inode = page->mapping->host;
+ efs_block_t size = inode->i_size;
+ int err;
+
+ err = -ENAMETOOLONG;
+ if (size > 2 * EFS_BLOCKSIZE)
+ goto fail;
+
+ /* read first 512 bytes of link target */
+ err = -EIO;
+ bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));
+ if (!bh)
+ goto fail;
+ memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);
+ brelse(bh);
+ if (size > EFS_BLOCKSIZE) {
+ bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));
+ if (!bh)
+ goto fail;
+ memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);
+ brelse(bh);
+ }
+ link[size] = '\0';
+ SetPageUptodate(page);
+ unlock_page(page);
+ return 0;
+fail:
+ SetPageError(page);
+ unlock_page(page);
+ return err;
+}
+
+const struct address_space_operations efs_symlink_aops = {
+ .readpage = efs_symlink_readpage
+};