string: factorize skip_spaces and export it to be generally available

[safe/jmp/linux-2.6] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index d3c190c..87f97ba 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1656,6 +1656,15 @@ struct file *do_filp_open(int dfd, const char *pathname,
        int will_write;
        int flag = open_to_namei_flags(open_flag);
 
+       /*
+        * O_SYNC is implemented as __O_SYNC|O_DSYNC.  As many places only
+        * check for O_DSYNC if the need any syncing at all we enforce it's
+        * always set instead of having to deal with possibly weird behaviour
+        * for malicious applications setting only __O_SYNC.
+        */
+       if (open_flag & __O_SYNC)
+               open_flag |= O_DSYNC;
+
        if (!acc_mode)
                acc_mode = MAY_OPEN | ACC_MODE(flag);