[29/30] fs: Remove calls to set and clear the folio error flag

Commit Message

Matthew Wilcox April 20, 2024, 2:50 a.m. UTC

Nobody checks the folio error flag any more, so we can stop setting
and clearing it.  Also remove the documentation suggesting to not
bother setting the error bit.

Signed-off-by: Matthew Wilcox (Oracle) <[e-mail]>
---
 Documentation/filesystems/vfs.rst | 3 +--
 mm/filemap.c                      | 8 --------
 2 files changed, 1 insertion(+), 10 deletions(-)

Patch

diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index 6e903a903f8f..a6022ec59a2d 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -913,8 +913,7 @@  cache in your filesystem.  The following members are defined:
 	stop attempting I/O, it can simply return.  The caller will
 	remove the remaining pages from the address space, unlock them
 	and decrement the page refcount.  Set PageUptodate if the I/O
-	completes successfully.  Setting PageError on any page will be
-	ignored; simply unlock the page if an I/O error occurs.
+	completes successfully.
 
 ``write_begin``
 	Called by the generic buffered write code to ask the filesystem
diff --git a/mm/filemap.c b/mm/filemap.c
index fc784259f278..f8d0cc980044 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -530,7 +530,6 @@  static void __filemap_fdatawait_range(struct address_space *mapping,
 			struct folio *folio = fbatch.folios[i];
 
 			folio_wait_writeback(folio);
-			folio_clear_error(folio);
 		}
 		folio_batch_release(&fbatch);
 		cond_resched();
@@ -2342,13 +2341,6 @@  static int filemap_read_folio(struct file *file, filler_t filler,
 	unsigned long pflags;
 	int error;
 
-	/*
-	 * A previous I/O error may have been due to temporary failures,
-	 * eg. multipath errors.  PG_error will be set again if read_folio
-	 * fails.
-	 */
-	folio_clear_error(folio);
-
 	/* Start the actual read. The read will unlock the page. */
 	if (unlikely(workingset))
 		psi_memstall_enter(&pflags);