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Add an explicit forward declaration for the struct. Fixes: 75404e07663b ("mm: move mmap/vma locking logic into specific files") Signed-off-by: Thomas Weißschuh --- This doesn't seem to break any in-tree code right now. I stumbled upon it while building a series for the next cycle. Instead of putting this fix into my series and spamming all the mm maintainers with it, maybe this could be part of the last mm bugfix pull for this cycle. --- include/linux/mmap_lock.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h index 11a078de9150df1beff4f0bfb16e199333767614..9792dd4fff0ff73829833aae8ea3229a31757d61 100644 --- a/include/linux/mmap_lock.h +++ b/include/linux/mmap_lock.h @@ -3,6 +3,7 @@ #define _LINUX_MMAP_LOCK_H /* Avoid a dependency loop by declaring here. */ +struct rcuwait; extern int rcuwait_wake_up(struct rcuwait *w); #include --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250916-mm-rcuwait-03c5fe95f36d Best regards, -- Thomas Weißschuh