unlock_page (9) - Linux Manuals

unlock_page: unlock a locked page

NAME

unlock_page - unlock a locked page

SYNOPSIS

void unlock_page(struct page * page);

ARGUMENTS

page

the page

DESCRIPTION

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).

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