[Xen-changelog] [xen master] xen/mm: Drop the parameter mfn from populate_pt_range

[patchbot@xxxxxxx]

commit c748d32597076ecb66a27ed63525fc5f3d5addda
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Wed Feb 21 13:46:25 2018 +0000
Commit:     Julien Grall <julien.grall@xxxxxxx>
CommitDate: Fri Apr 6 09:43:29 2018 +0100

    xen/mm: Drop the parameter mfn from populate_pt_range
    
    The function populate_pt_range is used to populate in advance the
    page-table but it will not do the actual mapping. So passing the MFN in
    parameter is pointless. Note that the only caller pass 0...
    
    At the same time replace 0 by INVALID_MFNs. While this does not matter
    as the entry will marked as not valid and populated, INVALID_MFN
    helps the reader to know the MFN is invalid.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    
    --
    
    Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Cc: Julien Grall <julien.grall@xxxxxxx>
    Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
    Cc: Jan Beulich <jbeulich@xxxxxxxx>
    Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Cc: Tim Deegan <tim@xxxxxxx>
    
        Changes in v6:
            - Add George's and Wei's reviewed-by
            - Add Andrew's acked-by
    
        Changes in v5:
            - Update the commit message to explain why 0 -> INVALID_MFN.
    
        Changes in v4:
            - Patch added.
---
 xen/arch/arm/mm.c    | 5 ++---
 xen/arch/x86/mm.c    | 5 ++---
 xen/common/vmap.c    | 2 +-
 xen/include/xen/mm.h | 3 +--
 4 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 1126e246c0..436df6936b 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -1072,10 +1072,9 @@ int map_pages_to_xen(unsigned long virt,
     return create_xen_entries(INSERT, virt, _mfn(mfn), nr_mfns, flags);
 }
 
-int populate_pt_range(unsigned long virt, unsigned long mfn,
-                      unsigned long nr_mfns)
+int populate_pt_range(unsigned long virt, unsigned long nr_mfns)
 {
-    return create_xen_entries(RESERVE, virt, _mfn(mfn), nr_mfns, 0);
+    return create_xen_entries(RESERVE, virt, INVALID_MFN, nr_mfns, 0);
 }
 
 int destroy_xen_mappings(unsigned long v, unsigned long e)
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 3737f9ba7f..2cd668962e 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -5057,10 +5057,9 @@ int map_pages_to_xen(
     return 0;
 }
 
-int populate_pt_range(unsigned long virt, unsigned long mfn,
-                      unsigned long nr_mfns)
+int populate_pt_range(unsigned long virt, unsigned long nr_mfns)
 {
-    return map_pages_to_xen(virt, mfn, nr_mfns, MAP_SMALL_PAGES);
+    return map_pages_to_xen(virt, mfn_x(INVALID_MFN), nr_mfns, 
MAP_SMALL_PAGES);
 }
 
 /*
diff --git a/xen/common/vmap.c b/xen/common/vmap.c
index 0b23f8fb97..11785ffb0a 100644
--- a/xen/common/vmap.c
+++ b/xen/common/vmap.c
@@ -42,7 +42,7 @@ void __init vm_init_type(enum vmap_region type, void *start, 
void *end)
     bitmap_fill(vm_bitmap(type), vm_low[type]);
 
     /* Populate page tables for the bitmap if necessary. */
-    populate_pt_range(va, 0, vm_low[type] - nr);
+    populate_pt_range(va, vm_low[type] - nr);
 }
 
 static void *vm_alloc(unsigned int nr, unsigned int align,
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index 142aa73354..538478fa24 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -175,8 +175,7 @@ int destroy_xen_mappings(unsigned long v, unsigned long e);
  * Create only non-leaf page table entries for the
  * page range in Xen virtual address space.
  */
-int populate_pt_range(unsigned long virt, unsigned long mfn,
-                      unsigned long nr_mfns);
+int populate_pt_range(unsigned long virt, unsigned long nr_mfns);
 /* Claim handling */
 unsigned long domain_adjust_tot_pages(struct domain *d, long pages);
 int domain_set_outstanding_pages(struct domain *d, unsigned long pages);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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