From d6d04d71daae9377129b13641f97ba2a961b2b26 Mon Sep 17 00:00:00 2001 From: Carlos Llamas Date: Tue, 6 Sep 2022 13:59:46 +0000 Subject: 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 Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20220906135948.3048225-3-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/android/binder_alloc.c | 25 ++----------------------- 1 file changed, 2 insertions(+), 23 deletions(-) (limited to 'drivers/android/binder_alloc.c') 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; } /** -- cgit