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| author | Alexey Dobriyan | 2013-08-20 21:17:24 +0200 |
|---|---|---|
| committer | David S. Miller | 2013-09-05 21:12:51 +0200 |
| commit | c4fe24485729fc2cbff324c111e67a1cc2f9adea (patch) | |
| tree | 26b45b77ad4ff49ae8f3af13a12f190439e53010 /fs/proc | |
| parent | sparc64: Remove RWSEM export leftovers (diff) | |
| download | kernel-qcow2-linux-c4fe24485729fc2cbff324c111e67a1cc2f9adea.tar.gz kernel-qcow2-linux-c4fe24485729fc2cbff324c111e67a1cc2f9adea.tar.xz kernel-qcow2-linux-c4fe24485729fc2cbff324c111e67a1cc2f9adea.zip | |
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>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/inode.c | 16 |
1 files changed, 16 insertions, 0 deletions
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, }; |