diff options
| -rw-r--r-- | drivers/android/binder_alloc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 195f120c4e8c..bb929eb87116 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -931,8 +931,8 @@ enum lru_status binder_alloc_free_page(struct list_head *item, mm = alloc->vma_vm_mm; if (!mmget_not_zero(mm)) goto err_mmget; - if (!down_write_trylock(&mm->mmap_sem)) - goto err_down_write_mmap_sem_failed; + if (!down_read_trylock(&mm->mmap_sem)) + goto err_down_read_mmap_sem_failed; vma = binder_alloc_get_vma(alloc); list_lru_isolate(lru, item); @@ -945,7 +945,7 @@ enum lru_status binder_alloc_free_page(struct list_head *item, trace_binder_unmap_user_end(alloc, index); } - up_write(&mm->mmap_sem); + up_read(&mm->mmap_sem); mmput(mm); trace_binder_unmap_kernel_start(alloc, index); @@ -959,7 +959,7 @@ enum lru_status binder_alloc_free_page(struct list_head *item, mutex_unlock(&alloc->mutex); return LRU_REMOVED_RETRY; -err_down_write_mmap_sem_failed: +err_down_read_mmap_sem_failed: mmput_async(mm); err_mmget: err_page_already_freed: |