mm: vmscan: throttle reclaim if encountering too many dirty pages under writeback

[pandora-kernel.git] / fs / compat.c

diff --git a/fs/compat.c b/fs/compat.c
index 05e3f3d..c987875 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -246,11 +246,8 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
            __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
            __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
            __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
-           __put_user(0, &ubuf->f_spare[0]) || 
-           __put_user(0, &ubuf->f_spare[1]) || 
-           __put_user(0, &ubuf->f_spare[2]) || 
-           __put_user(0, &ubuf->f_spare[3]) || 
-           __put_user(0, &ubuf->f_spare[4]))
+           __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+           __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
                return -EFAULT;
        return 0;
 }
@@ -549,7 +546,7 @@ out:
 ssize_t compat_rw_copy_check_uvector(int type,
                const struct compat_iovec __user *uvector, unsigned long nr_segs,
                unsigned long fast_segs, struct iovec *fast_pointer,
-               struct iovec **ret_pointer)
+               struct iovec **ret_pointer, int check_access)
 {
        compat_ssize_t tot_len;
        struct iovec *iov = *ret_pointer = fast_pointer;
@@ -596,7 +593,8 @@ ssize_t compat_rw_copy_check_uvector(int type,
                }
                if (len < 0)    /* size_t not fitting in compat_ssize_t .. */
                        goto out;
-               if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+               if (check_access &&
+                   !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
                        ret = -EFAULT;
                        goto out;
                }
@@ -1110,7 +1108,7 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
                goto out;
 
        tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
-                                              UIO_FASTIOV, iovstack, &iov);
+                                              UIO_FASTIOV, iovstack, &iov, 1);
        if (tot_len == 0) {
                ret = 0;
                goto out;