[hurd] 28/28: libpager: fix returning error on data_unlock

[Samuel Thibault]

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sthibault pushed a commit to branch upstream
in repository hurd.

commit 385d9bf1b81bc35f06cdf49f57bf65545339cbbb
Author: Brent W. Baccala <address@hidden>
Date:   Mon Nov 14 00:44:17 2016 +0100

    libpager: fix returning error on data_unlock
    
    The _pager_lock_object call needs to be asynchronous because libpager is
    single threaded, at least in the sense that individual memory objects
    only process one request at a time.  In this case, we're processing a
    data_unlock request, and would have to handle a lock_completed message
    before lock_object would return (synchronously).
    
    * libpager/data-unlock.c (_pager_S_memory_object_data_unlock): Pass 0 to
    sync parameter of _pager_lock_object() call.
---
 libpager/data-unlock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libpager/data-unlock.c b/libpager/data-unlock.c
index 8c9680c..077e673 100644
--- a/libpager/data-unlock.c
+++ b/libpager/data-unlock.c
@@ -73,7 +73,7 @@ _pager_S_memory_object_data_unlock (struct pager *p,
       /* Flush the page, and set a bit so that m_o_data_request knows
         to issue an error.  */
       _pager_lock_object (p, offset, length, MEMORY_OBJECT_RETURN_NONE, 1,
-                         VM_PROT_WRITE, 1);
+                         VM_PROT_WRITE, 0);
       _pager_mark_next_request_error (p, offset, length, err);
     }
  out:

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