binder: remove user_buffer_offset

Remove user_buffer_offset since there is no kernel
buffer pointer anymore.

Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 10 deletions

diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
index d4cbe4b3947a..0e7f0aa967c3 100644
--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c
@@ -138,17 +138,17 @@ static struct binder_buffer *binder_alloc_prepare_to_free_locked(
 {
         struct rb_node *n = alloc->allocated_buffers.rb_node;
         struct binder_buffer *buffer;
-        void *kern_ptr;
+        void *uptr;
 
-        kern_ptr = (void *)(user_ptr - alloc->user_buffer_offset);
+        uptr = (void *)user_ptr;
 
         while (n) {
                 buffer = rb_entry(n, struct binder_buffer, rb_node);
                 BUG_ON(buffer->free);
 
-                if (kern_ptr < buffer->data)
+                if (uptr < buffer->data)
                         n = n->rb_left;
-                else if (kern_ptr > buffer->data)
+                else if (uptr > buffer->data)
                         n = n->rb_right;
                 else {
                         /*
@@ -265,8 +265,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
                 page->alloc = alloc;
                 INIT_LIST_HEAD(&page->lru);
 
-                user_page_addr =
-                        (uintptr_t)page_addr + alloc->user_buffer_offset;
+                user_page_addr = (uintptr_t)page_addr;
                 ret = vm_insert_page(vma, user_page_addr, page[0].page_ptr);
                 if (ret) {
                         pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
@@ -694,7 +693,6 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
         }
 
         alloc->buffer = (void *)vma->vm_start;
-        alloc->user_buffer_offset = 0;
         mutex_unlock(&binder_alloc_mmap_lock);
 
         alloc->pages = kcalloc((vma->vm_end - vma->vm_start) / PAGE_SIZE,
@@ -941,9 +939,7 @@ enum lru_status binder_alloc_free_page(struct list_head *item,
         if (vma) {
                 trace_binder_unmap_user_start(alloc, index);
 
-                zap_page_range(vma,
-                               page_addr + alloc->user_buffer_offset,
-                               PAGE_SIZE);
+                zap_page_range(vma, page_addr, PAGE_SIZE);
 
                 trace_binder_unmap_user_end(alloc, index);