[Xen-changelog] [xen master] mm: fix emfn calculation in init_domheap_pages()

[patchbot@xxxxxxx]

commit 87c0718ce7f0fe80065c8f54d99774e0741780f2
Author:     Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
AuthorDate: Mon Apr 16 14:11:09 2018 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Apr 16 14:11:09 2018 +0200

    mm: fix emfn calculation in init_domheap_pages()
    
    The "end" address must be rounded down before shifting,
    otherwise we will insert wrong page range to a heap if address isn't
    page aligned.
    
    It seems that a copy-paste mistake took place in the following commit:
    0c12972e34b20a26f2b42044b98bf12db7ed62b6
    xen/mm: Switch some of page_alloc.c to typesafe MFN
    
    Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Release-acked-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/common/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 186b39a6c8..20ee1e4897 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -2166,7 +2166,7 @@ void init_domheap_pages(paddr_t ps, paddr_t pe)
     ASSERT(!in_irq());
 
     smfn = maddr_to_mfn(round_pgup(ps));
-    emfn = maddr_to_mfn(round_pgup(pe));
+    emfn = maddr_to_mfn(round_pgdown(pe));
 
     if ( mfn_x(emfn) <= mfn_x(smfn) )
         return;
--
generated by git-patchbot for /home/xen/git/xen.git#master

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