Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\xarray.h Create Date:2022-07-28 05:42:17
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:xas_reset() - Reset an XArray operation state.*@xas: XArray operation state.* Resets the error or walk state of the @xas so future walks of the* array will start from the root. Use this if you have dropped the* xarray lock and want to reuse the xa_state.

Proto:static inline void xas_reset(struct xa_state *xas)

Type:void

Parameter:

TypeParameterName
struct xa_state *xas
1467  xa_node = XAS_RESTART
Caller
NameDescribe
check_xas_retry
check_xa_mark_2
find_get_entryd_get_entry - find and get a page cache entry*@mapping: the address_space to search*@offset: the page cache index* Looks up the page cache slot at @mapping & @offset
find_get_entriesd_get_entries - gang pagecache lookup*@mapping: The address_space to search*@start: The starting page cache index*@nr_entries: The maximum number of entries*@entries: Where the resulting entries are placed*@indices: The cache indices corresponding to the
find_get_pages_ranged_get_pages_range - gang pagecache lookup*@mapping: The address_space to search*@start: The starting page index*@end: The final page index (inclusive)*@nr_pages: The maximum number of pages*@pages: Where the resulting pages are placed*
find_get_pages_contigd_get_pages_contig - gang contiguous pagecache lookup*@mapping: The address_space to search*@index: The starting page index*@nr_pages: The maximum number of pages*@pages: Where the resulting pages are placed* find_get_pages_contig() works exactly like
find_get_pages_range_tagd_get_pages_range_tag - find and return pages in given range matching @tag*@mapping: the address_space to search*@index: the starting page index*@end: The final page index (inclusive)*@tag: the tag index*@nr_pages: the maximum number of pages*@pages:
get_unlocked_entryLook up entry in page cache, wait for it to become unlocked if it* is a DAX entry and return it. The caller must subsequently call* put_unlocked_entry() if it did not lock the entry or dax_unlock_entry()* if it did
dax_unlock_entryWe used the xa_state to get the entry, but then we locked the entry and* dropped the xa_lock, so we know the xa_state is stale and must be reset* before use.
grab_mapping_entryFind page cache entry at given index. If it is a DAX entry, return it* with the entry locked. If the page cache doesn't contain an entry at* that index, add a locked empty entry.* When requesting an entry with size DAX_PMD, grab_mapping_entry() will
dax_insert_entryBy this point grab_mapping_entry() has ensured that we have a locked entry* of the appropriate size so we don't have to worry about downgrading PMDs to* PTEs
dax_writeback_one