unlock_page9
Unlock a locked page
Usage
void unlock_page(struct page * page);
Arguments
page
the page
Overview
Unlocks the page and wakes up sleepers in ___wait_on_page_locked. Also wakes sleepers in wait_on_page_writeback because the wakeup mechanism between PageLocked pages and PageWriteback pages is shared. But that's OK - sleepers in wait_on_page_writeback just go back to sleep.
The mb is necessary to enforce ordering between the clear_bit and the read of the waitqueue (to avoid SMP races with a parallel wait_on_page_locked).
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.