procfs: new helper - PDE_DATA(inode)

The only part of proc_dir_entry the code outside of fs/proc
really cares about is PDE(inode)->data.  Provide a helper
for that; static inline for now, eventually will be moved
to fs/proc, along with the knowledge of struct proc_dir_entry
layout.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 13 deletions

diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 0b009470e6db..12e4fb5824c1 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -46,9 +46,7 @@ proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
 static ssize_t
 proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 {
-        const struct inode *ino = file_inode(file);
-        const struct proc_dir_entry *dp = PDE(ino);
-        struct pci_dev *dev = dp->data;
+        struct pci_dev *dev = PDE_DATA(file_inode(file));
         unsigned int pos = *ppos;
         unsigned int cnt, size;
 
@@ -59,7 +57,7 @@ proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *pp
          */
 
         if (capable(CAP_SYS_ADMIN))
-                size = dp->size;
+                size = dev->cfg_size;
         else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
                 size = 128;
         else
@@ -133,10 +131,9 @@ static ssize_t
 proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos)
 {
         struct inode *ino = file_inode(file);
-        const struct proc_dir_entry *dp = PDE(ino);
-        struct pci_dev *dev = dp->data;
+        struct pci_dev *dev = PDE_DATA(ino);
         int pos = *ppos;
-        int size = dp->size;
+        int size = dev->cfg_size;
         int cnt;
 
         if (pos >= size)
@@ -200,7 +197,7 @@ proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, lof
         pci_config_pm_runtime_put(dev);
 
         *ppos = pos;
-        i_size_write(ino, dp->size);
+        i_size_write(ino, dev->cfg_size);
         return nbytes;
 }
 
@@ -212,8 +209,7 @@ struct pci_filp_private {
 static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
                                unsigned long arg)
 {
-        const struct proc_dir_entry *dp = PDE(file_inode(file));
-        struct pci_dev *dev = dp->data;
+        struct pci_dev *dev = PDE_DATA(file_inode(file));
 #ifdef HAVE_PCI_MMAP
         struct pci_filp_private *fpriv = file->private_data;
 #endif /* HAVE_PCI_MMAP */
@@ -253,9 +249,7 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
 #ifdef HAVE_PCI_MMAP
 static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
 {
-        struct inode *inode = file_inode(file);
-        const struct proc_dir_entry *dp = PDE(inode);
-        struct pci_dev *dev = dp->data;
+        struct pci_dev *dev = PDE_DATA(file_inode(file));
         struct pci_filp_private *fpriv = file->private_data;
         int i, ret;