ocfs2: use a folio in ocfs2_fast_symlink_read_folio()

ocfs2: use a folio in ocfs2_fast_symlink_read_folio()

Use folio_end_read() instead of SetPageUptodate() and unlock_page().  Use
memcpy_to_folio() instead of open-coding a kmap_atomic() sequence.

Link: https://lkml.kernel.org/r/20241205171653.3179945-21-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Mark Tinguely <mark.tinguely@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>