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Hook up buffer_migrate_folio

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This works together with the dropped block_write_full_page(), allowing
us to drop the _writepage() method as long as we implement
_writepages(). Since v5.19-rc3-395-g67235182a41c. This used to be the
.migratepage() method.

Signed-off-by: Auke Kok <auke.kok@versity.com>
This commit is contained in:
Auke Kok
2025-05-05 15:08:50 -04:00
parent da6dff7336
commit 5eaea548f8
2 changed files with 12 additions and 0 deletions
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9
kmod/src/Makefile.kernelcompat
View File

@@ -578,3 +578,12 @@ endif
ifneq (,$(shell grep 'const struct attribute_group ..default_groups;' include/linux/kobject.h))
ccflags-y += -DKC_KOBJECT_DEFAULT_GROUPS
endif
#
# v5.19-rc3-395-g67235182a41c
#
# Adds buffer_migrate_folio(), similar to other fss. Quote willy: "If the filesystem
# implements migrate_folio and writepages, there is no need for a writepage implementation."
ifneq (,$(shell grep 'int buffer_migrate_folio.struct address_space' include/linux/buffer_head.h))
ccflags-y += -DKC_HAVE_BUFFER_MIGRATE_FOLIO
endif

3
kmod/src/data.c
View File

@@ -2302,6 +2302,9 @@ const struct address_space_operations scoutfs_file_aops = {
.dirty_folio = block_dirty_folio,
.invalidate_folio = block_invalidate_folio,
.read_folio = scoutfs_read_folio,
#ifdef KC_HAVE_BUFFER_MIGRATE_FOLIO
.migrate_folio = buffer_migrate_folio,
#endif
#else
.readpage = scoutfs_readpage,
#endif