Add BLKDISCARD ioctl to allow userspace to discard sectors

[safe/jmp/linux-2.6] / block / compat_ioctl.c

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index c23177e..1e559fb 100644 (file)
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -788,6 +788,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
                return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
        case BLKFLSBUF:
        case BLKROSET:
+       case BLKDISCARD:
        /*
         * the ones below are implemented in blkdev_locked_ioctl,
         * but we call blkdev_ioctl, which gets the lock for us