On Mon, Sep 21, 2020 at 04:24:23PM +0800, Liu Shixin wrote:
> Simplify the return expression.
>
> Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
> ---
Why not is all I can really say. :) But if this is about simplifying you
could get rid of the "ret" and "failure string" variables, and the goto
in that function completely by doing sm like this (__completely
untested__):
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index f936530a19b0..26f4dc81b008 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5182,9 +5182,7 @@ static const struct vm_operations_struct binder_vm_ops = {
static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
{
- int ret;
struct binder_proc *proc = filp->private_data;
- const char *failure_string;
if (proc->tsk != current->group_leader)
return -EINVAL;
@@ -5196,9 +5194,9 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
(unsigned long)pgprot_val(vma->vm_page_prot));
if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
- ret = -EPERM;
- failure_string = "bad vm_flags";
- goto err_bad_arg;
+ pr_err("%s: %d %lx-%lx %s failed %d\n", __func__,
+ proc->pid, vma->vm_start, vma->vm_end, "bad vm_flags", -EPERM);
+ return -EPERM;
}
vma->vm_flags |= VM_DONTCOPY | VM_MIXEDMAP;
vma->vm_flags &= ~VM_MAYWRITE;
@@ -5206,15 +5204,7 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
vma->vm_ops = &binder_vm_ops;
vma->vm_private_data = proc;
- ret = binder_alloc_mmap_handler(&proc->alloc, vma);
- if (ret)
- return ret;
- return 0;
-
-err_bad_arg:
- pr_err("%s: %d %lx-%lx %s failed %d\n", __func__,
- proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
- return ret;
+ return binder_alloc_mmap_handler(&proc->alloc, vma);
}
Christian
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