[Xen-changelog] [xen master] x86/pvh-dom0: Remove unnecessary function pointer call from modify_identity_mmio()

[patchbot@xxxxxxx]

commit e3b418ac491919127211b4d3c692d431061d7c09
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Dec 21 17:23:32 2018 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Jan 23 18:29:11 2019 +0000

    x86/pvh-dom0: Remove unnecessary function pointer call from 
modify_identity_mmio()
    
    Function pointer calls are far more expensive in a post-Spectre world, and
    this one doesn't need to be.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Release-acked-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/arch/x86/hvm/dom0_build.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 303c44b5d9..51cf490811 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -79,8 +79,8 @@ static int __init modify_identity_mmio(struct domain *d, 
unsigned long pfn,
 
     for ( ; ; )
     {
-        rc = (map ? map_mmio_regions : unmap_mmio_regions)
-             (d, _gfn(pfn), nr_pages, _mfn(pfn));
+        rc = map ?   map_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn))
+                 : unmap_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn));
         if ( rc == 0 )
             break;
         if ( rc < 0 )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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