[Xen-changelog] [xen master] ARM: GIC: add GIC_INVALID to enum gic_version

[patchbot@xxxxxxx]

commit db8b980c4d7edd5a498659bb87b9965a60d79867
Author:     Andre Przywara <andre.przywara@xxxxxxxxxx>
AuthorDate: Wed Mar 21 13:38:21 2018 +0000
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Mon Mar 26 13:30:55 2018 -0700

    ARM: GIC: add GIC_INVALID to enum gic_version
    
    The enum gic_version at the moment just contains GIC_V2 and GIC_V3,
    where GIC_V2 happens to map to 0. So without having initialised a
    variable of that type, we will read back GIC_V2 (when allocated with zeroing
    the memory).
    To prevent ambiguities and to give an explicitly uninitialised state, add
    a new first member: GIC_INVALID. Also make it obvious that this has a
    "0" encoding.
    
    Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/include/asm-arm/gic.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index 565b0875ca..3079387e06 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -227,6 +227,7 @@ struct gic_lr {
 };
 
 enum gic_version {
+    GIC_INVALID = 0,    /* the default until explicitly set up */
     GIC_V2,
     GIC_V3,
 };
--
generated by git-patchbot for /home/xen/git/xen.git#master

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