PCI: kill BKL in /proc/pci

All operations in the pci procfs ioctl functions are
atomic, so no lock is needed here.

Also add a compat_ioctl method, since all the commands
are compatible in 32 bit mode.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 01f0306525a5..297b72c880a1 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -212,8 +212,6 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
 #endif /* HAVE_PCI_MMAP */
         int ret = 0;
 
-        lock_kernel();
-
         switch (cmd) {
         case PCIIOC_CONTROLLER:
                 ret = pci_domain_nr(dev->bus);
@@ -242,7 +240,6 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
                 break;
         };
 
-        unlock_kernel();
         return ret;
 }
 
@@ -306,6 +303,7 @@ static const struct file_operations proc_bus_pci_operations = {
         .read           = proc_bus_pci_read,
         .write          = proc_bus_pci_write,
         .unlocked_ioctl = proc_bus_pci_ioctl,
+        .compat_ioctl   = proc_bus_pci_ioctl,
 #ifdef HAVE_PCI_MMAP
         .open           = proc_bus_pci_open,
         .release        = proc_bus_pci_release,