linux-2.6.33/find_get_page()
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開始行:
*参照元 [#r23730e0]
#backlinks
*説明 [#kd1bac38]
-パス: [[linux-2.6.33/mm/filemap.c]]
-FIXME: これは何？
--説明
**引数 [#u364411c]
-struct address_space *mapping
--
--[[linux-2.6.33/address_page]]
-pgoff_t offset
--
**返り値 [#jec5a816]
-struct page *
--
**参考 [#e062f97a]
*実装 [#f081d6d5]
/**
* find_get_page - find and get a page reference
* @mapping: the address_space to search
* @offset: the page index
*
* Is there a pagecache struct page at the given (mappin...
* If yes, increment its refcount and return it; if no, ...
*/
struct page *find_get_page(struct address_space *mapping...
{
void **pagep;
struct page *page;
-
--[[linux-2.6.33/page]]
rcu_read_lock();
-
--[[linux-2.6.33/rcu_read_lock()]]
repeat:
page = NULL;
pagep = radix_tree_lookup_slot(&mapping->page_tree, off...
-
--[[linux-2.6.33/radix_tree_lookup_slot()]]
if (pagep) {
page = radix_tree_deref_slot(pagep);
if (unlikely(!page || page == RADIX_TREE_RETRY))
goto repeat;
-
--[[linux-2.6.33/radix_tree_deref_slot()]]
if (!page_cache_get_speculative(page))
goto repeat;
-
--[[linux-2.6.33/page_cache_get_speculative()]]
/*
* Has the page moved?
* This is part of the lockless pagecache protocol. See
* include/linux/pagemap.h for details.
*/
if (unlikely(page != *pagep)) {
page_cache_release(page);
goto repeat;
}
-
--[[linux-2.6.33/page_cache_release()]]
}
rcu_read_unlock();
-
--[[linux-2.6.33/rcu_read_unlock()]]
return page;
}
EXPORT_SYMBOL(find_get_page);
-特にライセンスを区別せずシンボルを公開する。
--[[linux-2.6.33/EXPORT_SYMBOL()]]
*コメント [#i0630ceb]
終了行:
*参照元 [#r23730e0]
#backlinks
*説明 [#kd1bac38]
-パス: [[linux-2.6.33/mm/filemap.c]]
-FIXME: これは何？
--説明
**引数 [#u364411c]
-struct address_space *mapping
--
--[[linux-2.6.33/address_page]]
-pgoff_t offset
--
**返り値 [#jec5a816]
-struct page *
--
**参考 [#e062f97a]
*実装 [#f081d6d5]
/**
* find_get_page - find and get a page reference
* @mapping: the address_space to search
* @offset: the page index
*
* Is there a pagecache struct page at the given (mappin...
* If yes, increment its refcount and return it; if no, ...
*/
struct page *find_get_page(struct address_space *mapping...
{
void **pagep;
struct page *page;
-
--[[linux-2.6.33/page]]
rcu_read_lock();
-
--[[linux-2.6.33/rcu_read_lock()]]
repeat:
page = NULL;
pagep = radix_tree_lookup_slot(&mapping->page_tree, off...
-
--[[linux-2.6.33/radix_tree_lookup_slot()]]
if (pagep) {
page = radix_tree_deref_slot(pagep);
if (unlikely(!page || page == RADIX_TREE_RETRY))
goto repeat;
-
--[[linux-2.6.33/radix_tree_deref_slot()]]
if (!page_cache_get_speculative(page))
goto repeat;
-
--[[linux-2.6.33/page_cache_get_speculative()]]
/*
* Has the page moved?
* This is part of the lockless pagecache protocol. See
* include/linux/pagemap.h for details.
*/
if (unlikely(page != *pagep)) {
page_cache_release(page);
goto repeat;
}
-
--[[linux-2.6.33/page_cache_release()]]
}
rcu_read_unlock();
-
--[[linux-2.6.33/rcu_read_unlock()]]
return page;
}
EXPORT_SYMBOL(find_get_page);
-特にライセンスを区別せずシンボルを公開する。
--[[linux-2.6.33/EXPORT_SYMBOL()]]
*コメント [#i0630ceb]
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