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 302e761..c987875 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -546,7 +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;
@@ -593,7 +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;
                }
@@ -1107,7 +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;