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authorMatthew Wilcox (Oracle) <willy@infradead.org>2022-02-09 23:21:52 +0300
committerMatthew Wilcox (Oracle) <willy@infradead.org>2022-03-15 15:23:30 +0300
commitaffa80e8c6a1df473694c2087259901872309cc4 (patch)
tree0e900b38906bdcf8608bb8826765370f5d12c175 /Documentation/filesystems/locking.rst
parentf50015a596fa106bf642bd85fbf6e6b52cc913d0 (diff)
downloadlinux-affa80e8c6a1df473694c2087259901872309cc4.tar.xz
fs: Add aops->launder_folio
Since the only difference between ->launder_page and ->launder_folio is the type of the pointer, these can safely use a union without affecting bisectability. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs Tested-by: David Howells <dhowells@redhat.com> # afs
Diffstat (limited to 'Documentation/filesystems/locking.rst')
-rw-r--r--Documentation/filesystems/locking.rst10
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index 8e9cbc0fb70f..dee512efb458 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -257,7 +257,7 @@ prototypes::
bool (*isolate_page) (struct page *, isolate_mode_t);
int (*migratepage)(struct address_space *, struct page *, struct page *);
void (*putback_page) (struct page *);
- int (*launder_page)(struct page *);
+ int (*launder_folio)(struct folio *);
bool (*is_partially_uptodate)(struct folio *, size_t from, size_t count);
int (*error_remove_page)(struct address_space *, struct page *);
int (*swap_activate)(struct file *);
@@ -285,7 +285,7 @@ direct_IO:
isolate_page: yes
migratepage: yes (both)
putback_page: yes
-launder_page: yes
+launder_folio: yes
is_partially_uptodate: yes
error_remove_page: yes
swap_activate: no
@@ -385,9 +385,9 @@ the kernel assumes that the fs has no private interest in the buffers.
->freepage() is called when the kernel is done dropping the page
from the page cache.
-->launder_page() may be called prior to releasing a page if
-it is still found to be dirty. It returns zero if the page was successfully
-cleaned, or an error value if not. Note that in order to prevent the page
+->launder_folio() may be called prior to releasing a folio if
+it is still found to be dirty. It returns zero if the folio was successfully
+cleaned, or an error value if not. Note that in order to prevent the folio
getting mapped back in and redirtied, it needs to be kept locked
across the entire operation.