From c4fe24485729fc2cbff324c111e67a1cc2f9adea Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 20 Aug 2013 22:17:24 +0300 Subject: 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 Signed-off-by: David S. Miller --- fs/proc/inode.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'fs') diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 073aea60cf8f..9f8ef9b7674d 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -285,6 +285,20 @@ static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma) 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 @@ static const struct file_operations proc_reg_file_ops = { .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 @@ static const struct file_operations proc_reg_file_ops_no_compat = { .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, }; -- cgit v1.2.3-59-g8ed1b