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xen/rbtree: fix MISRA C 2012 Rule 20.7 violation
In macro __rb_parent(), add parentheses around the macro parameter to prevent against unintended expansions. Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
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Xenia Ragiadakou authored and Jan Beulich committed
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@@ -46,7 +46,7 @@
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#define RB_RED 0
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#define RB_BLACK 1
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#define __rb_parent(pc) ((struct rb_node *)(pc & ~3))
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#define __rb_parent(pc) ((struct rb_node *)((pc) & ~3))
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#define __rb_color(pc) ((pc) & 1)
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#define __rb_is_black(pc) __rb_color(pc)
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