sparc: fix PCI device proc file mmap(2)
Commit 786d7e1612f0b0adb6046f19b906609e4fe8b1ba "Fix rmmod/read/write races in /proc entries"
must have broken mmapping of PCI device proc files on Sparc.
Notice how it adds wrapper around ->mmap but doesn't do it around ->get_unmapped_area.
Add wrapper around ->get_unmapped_area.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 073aea60..9f8ef9b 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -285,6 +285,20 @@
return rv;
}
+static unsigned long proc_reg_get_unmapped_area(struct file *file, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct proc_dir_entry *pde = PDE(file_inode(file));
+ int rv = -EIO;
+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
+ if (use_pde(pde)) {
+ get_unmapped_area = pde->proc_fops->get_unmapped_area;
+ if (get_unmapped_area)
+ rv = get_unmapped_area(file, orig_addr, len, pgoff, flags);
+ unuse_pde(pde);
+ }
+ return rv;
+}
+
static int proc_reg_open(struct inode *inode, struct file *file)
{
struct proc_dir_entry *pde = PDE(inode);
@@ -356,6 +370,7 @@
.compat_ioctl = proc_reg_compat_ioctl,
#endif
.mmap = proc_reg_mmap,
+ .get_unmapped_area = proc_reg_get_unmapped_area,
.open = proc_reg_open,
.release = proc_reg_release,
};
@@ -368,6 +383,7 @@
.poll = proc_reg_poll,
.unlocked_ioctl = proc_reg_unlocked_ioctl,
.mmap = proc_reg_mmap,
+ .get_unmapped_area = proc_reg_get_unmapped_area,
.open = proc_reg_open,
.release = proc_reg_release,
};
