Re: [PATCH v3 -next] binder: simplify the return expression of binder_mmap
On Tue, Sep 29, 2020 at 09:52:16AM +0800, Liu Shixin wrote: > Simplify the return expression. > > Signed-off-by: Liu Shixin > --- Thanks! Acked-by: Christian Brauner
Re: [PATCH v3 -next] binder: simplify the return expression of binder_mmap
Thanks!
On Tue, Sep 29, 2020 at 3:30 AM Liu Shixin wrote:
>
> Simplify the return expression.
>
> Signed-off-by: Liu Shixin
Acked-by: Martijn Coenen
> ---
> v3: Add the change description.
> v2: Get rid of the "ret" and "failure string" variables.
> v1: Simplify the return expression.
> ---
> drivers/android/binder.c | 18 --
> 1 file changed, 4 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/android/binder.c b/drivers/android/binder.c
> index 37a505c41dec..49c0700816a5 100644
> --- a/drivers/android/binder.c
> +++ b/drivers/android/binder.c
> @@ -5180,9 +5180,7 @@ 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;
> @@ -5194,9 +5192,9 @@ 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;
> @@ -5204,15 +5202,7 @@ static int binder_mmap(struct file *filp, struct
> vm_area_struct *vma)
> vma->vm_ops = _vm_ops;
> vma->vm_private_data = proc;
>
> - ret = binder_alloc_mmap_handler(>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(>alloc, vma);
> }
>
> static int binder_open(struct inode *nodp, struct file *filp)
> --
> 2.25.1
>
Re: [PATCH v3 -next] binder: simplify the return expression of binder_mmap
On Tue, Sep 29, 2020 at 09:52:16AM +0800, Liu Shixin wrote:
> Simplify the return expression.
>
> Signed-off-by: Liu Shixin
> ---
> v3: Add the change description.
> v2: Get rid of the "ret" and "failure string" variables.
> v1: Simplify the return expression.
> ---
> drivers/android/binder.c | 18 --
> 1 file changed, 4 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/android/binder.c b/drivers/android/binder.c
> index 37a505c41dec..49c0700816a5 100644
> --- a/drivers/android/binder.c
> +++ b/drivers/android/binder.c
> @@ -5180,9 +5180,7 @@ 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;
> @@ -5194,9 +5192,9 @@ 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;
> @@ -5204,15 +5202,7 @@ static int binder_mmap(struct file *filp, struct
> vm_area_struct *vma)
> vma->vm_ops = _vm_ops;
> vma->vm_private_data = proc;
>
> - ret = binder_alloc_mmap_handler(>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(>alloc, vma);
> }
>
> static int binder_open(struct inode *nodp, struct file *filp)
> --
> 2.25.1
Todd and other Binder maintainers, what do you think of this?
thanks,
greg k-h
[PATCH v3 -next] binder: simplify the return expression of binder_mmap
Simplify the return expression.
Signed-off-by: Liu Shixin
---
v3: Add the change description.
v2: Get rid of the "ret" and "failure string" variables.
v1: Simplify the return expression.
---
drivers/android/binder.c | 18 --
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 37a505c41dec..49c0700816a5 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5180,9 +5180,7 @@ 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;
@@ -5194,9 +5192,9 @@ 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;
@@ -5204,15 +5202,7 @@ static int binder_mmap(struct file *filp, struct
vm_area_struct *vma)
vma->vm_ops = _vm_ops;
vma->vm_private_data = proc;
- ret = binder_alloc_mmap_handler(>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(>alloc, vma);
}
static int binder_open(struct inode *nodp, struct file *filp)
--
2.25.1
