1. NAME▲

unlock_page - unlock a locked page

2. SYNOPSIS ▲

void unlock_page(struct page *  page );

3. ARGUMENTS ▲

page
    the page

4. DESCRIPTION ▲

Unlocks the page and wakes up sleepers in ___wait_on_page_locked. Also wakes sleepers in wait_on_page_writeback because the wakeup mechananism between PageLocked pages and PageWriteback pages is shared. But thatAqs 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).

5. COPYRIGHT ▲