[xen staging] iommu: fix MISRA C 2012 Rule 8.7 violation

[patchbot@xxxxxxx]

commit 1fd3698175d2de5c0b91c28902cfe0dac6c332a9
Author:     Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
AuthorDate: Tue Jun 28 17:07:11 2022 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Jun 28 17:07:11 2022 +0200

    iommu: fix MISRA C 2012 Rule 8.7 violation
    
    The variable iommu_crash_disable is referenced only in one translation unit.
    Change its linkage from external to internal by adding the storage-class
    specifier static to its definition.
    
    This patch also aims to resolve indirectly a MISRA C 2012 Rule 8.4 violation
    warning.
    
    Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/drivers/passthrough/iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index 75df3aa8dd..77f64e6174 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -29,7 +29,7 @@ bool_t __initdata iommu_enable = 1;
 bool_t __read_mostly iommu_enabled;
 bool_t __read_mostly force_iommu;
 bool_t __read_mostly iommu_verbose;
-bool_t __read_mostly iommu_crash_disable;
+static bool_t __read_mostly iommu_crash_disable;
 
 #define IOMMU_quarantine_none         0 /* aka false */
 #define IOMMU_quarantine_basic        1 /* aka true */
--
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