v6: Simplify the multiple layers of conditionals for if {}
- if (page) {
- err = !is_zone_device_page(page) ? page_to_nid(page)
- : -ENOENT;
- if (foll_flags & FOLL_GET)
- put_page(page);
- } else {
- err = -ENOENT;
- }
+ err = -ENOENT;
+ if (!page)
+ goto set_status;
+
+ if (!is_zone_device_page(page))
+ err = page_to_nid(page);
+
+ if (foll_flags & FOLL_GET)
+ put_page(page);
v5: reword the commit message for FOLL_GET with more information.
v4: add '()' for the function for readability.
add more words about the Non-LRU pages fix in commit message.
v3: Merge the fix for handling Non-LRU pages into one patch.
Drop the break_ksm zone device page check.
v2: Add the Non-LRU pages fix with two patches, so that
'mm: migration: fix the FOLL_GET' can be applied directly
on linux-5.19 stable branch.
Haiyue Wang (2):
mm: migration: fix the FOLL_GET failure on following huge page
mm: fix the handling Non-LRU pages returned by follow_page
mm/huge_memory.c | 4 ++--
mm/ksm.c | 12 +++++++++---
mm/migrate.c | 23 +++++++++++++++++------
3 files changed, 28 insertions(+), 11 deletions(-)
--
2.37.2
