diff options
| author | Carlos Llamas | 2022-09-06 13:59:46 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2022-09-06 17:02:06 +0200 |
| commit | d6d04d71daae9377129b13641f97ba2a961b2b26 (patch) | |
| tree | 537e0c91967e89b07cd87a29a0ff4945d0a06e87 | |
| parent | e66b77e50522845d494a4a61ea2ad8f0d046a56f (diff) | |
binder: remove binder_alloc_set_vma()
The mmap_locked asserts here are not needed since this is only called
back from the mmap stack in ->mmap() and ->close() which always acquire
the lock first. Remove these asserts along with binder_alloc_set_vma()
altogether since it's trivial enough to be consumed by callers.
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20220906135948.3048225-3-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/android/binder_alloc.c | 25 |
1 files changed, 2 insertions, 23 deletions
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 749a4cd30a83..1c39cfce32fa 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -309,27 +309,6 @@ err_no_vma: return vma ? -ENOMEM : -ESRCH; } - -static inline void binder_alloc_set_vma(struct binder_alloc *alloc, - struct vm_area_struct *vma) -{ - unsigned long vm_start = 0; - - /* - * Allow clearing the vma with holding just the read lock to allow - * munmapping downgrade of the write lock before freeing and closing the - * file using binder_alloc_vma_close(). - */ - if (vma) { - vm_start = vma->vm_start; - mmap_assert_write_locked(alloc->mm); - } else { - mmap_assert_locked(alloc->mm); - } - - alloc->vma_addr = vm_start; -} - static inline struct vm_area_struct *binder_alloc_get_vma( struct binder_alloc *alloc) { @@ -793,7 +772,7 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc, buffer->free = 1; binder_insert_free_buffer(alloc, buffer); alloc->free_async_space = alloc->buffer_size / 2; - binder_alloc_set_vma(alloc, vma); + alloc->vma_addr = vma->vm_start; return 0; @@ -983,7 +962,7 @@ int binder_alloc_get_allocated_count(struct binder_alloc *alloc) */ void binder_alloc_vma_close(struct binder_alloc *alloc) { - binder_alloc_set_vma(alloc, NULL); + alloc->vma_addr = 0; } /** |