[PATCH 12/12] mm: delete mmap_write_trylock() and vma_try_start_write()

Hugh Dickins
2023-05-29T06:31:35Z

mmap_write_trylock() and vma_try_start_write() were added just for
khugepaged, but now it has no use for them: delete.

Signed-off-by: Hugh Dickins <hughd@google.com>
---
include/linux/mm.h | 17 -----------------
include/linux/mmap_lock.h | 10 ----------
2 files changed, 27 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3c2e56980853..9b24f8fbf899 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -690,21 +690,6 @@ static inline void vma_start_write(struct vm_area_struct *vma)
up_write(&vma->vm_lock->lock);
}

-static inline bool vma_try_start_write(struct vm_area_struct *vma)
-{
- int mm_lock_seq;
-
- if (__is_vma_write_locked(vma, &mm_lock_seq))
- return true;
-
- if (!down_write_trylock(&vma->vm_lock->lock))
- return false;
-
- vma->vm_lock_seq = mm_lock_seq;
- up_write(&vma->vm_lock->lock);
- return true;
-}
-
static inline void vma_assert_write_locked(struct vm_area_struct *vma)
{
int mm_lock_seq;
@@ -730,8 +715,6 @@ static inline bool vma_start_read(struct vm_area_struct *vma)
{ return false; }
static inline void vma_end_read(struct vm_area_struct *vma) {}
static inline void vma_start_write(struct vm_area_struct *vma) {}
-static inline bool vma_try_start_write(struct vm_area_struct *vma)
- { return true; }
static inline void vma_assert_write_locked(struct vm_area_struct *vma) {}
static inline void vma_mark_detached(struct vm_area_struct *vma,
bool detached) {}
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index aab8f1b28d26..d1191f02c7fa 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -112,16 +112,6 @@ static inline int mmap_write_lock_killable(struct mm_struct *mm)
return ret;
}

-static inline bool mmap_write_trylock(struct mm_struct *mm)
-{
- bool ret;
-
- __mmap_lock_trace_start_locking(mm, true);
- ret = down_write_trylock(&mm->mmap_lock) != 0;
- __mmap_lock_trace_acquire_returned(mm, true, ret);
- return ret;
-}
-
static inline void mmap_write_unlock(struct mm_struct *mm)
{
__mmap_lock_trace_released(mm, true);
--
2.35.3