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-rw-r--r--fs/sysfs/bin.c26
1 files changed, 8 insertions, 18 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index 4e321f7..d31d7b7 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -190,23 +190,6 @@ static void bin_vma_open(struct vm_area_struct *vma)
sysfs_put_active(attr_sd);
}
-static void bin_vma_close(struct vm_area_struct *vma)
-{
- struct file *file = vma->vm_file;
- struct bin_buffer *bb = file->private_data;
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
-
- if (!bb->vm_ops || !bb->vm_ops->close)
- return;
-
- if (!sysfs_get_active(attr_sd))
- return;
-
- bb->vm_ops->close(vma);
-
- sysfs_put_active(attr_sd);
-}
-
static int bin_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct file *file = vma->vm_file;
@@ -331,7 +314,6 @@ static int bin_migrate(struct vm_area_struct *vma, const nodemask_t *from,
static const struct vm_operations_struct bin_vm_ops = {
.open = bin_vma_open,
- .close = bin_vma_close,
.fault = bin_fault,
.page_mkwrite = bin_page_mkwrite,
.access = bin_access,
@@ -377,6 +359,14 @@ static int mmap(struct file *file, struct vm_area_struct *vma)
if (bb->mmapped && bb->vm_ops != vma->vm_ops)
goto out_put;
+ /*
+ * It is not possible to successfully wrap close.
+ * So error if someone is trying to use close.
+ */
+ rc = -EINVAL;
+ if (vma->vm_ops && vma->vm_ops->close)
+ goto out_put;
+
rc = 0;
bb->mmapped = 1;
bb->vm_ops = vma->vm_ops;
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