On Mon, 30 May 2011 11:46:04 +0200 Borislav Petkov <bp@xxxxxxxxx> wrote: > I get the following > > In file included from arch/x86/kvm/mmu.c:2856: > arch/x86/kvm/paging_tmpl.h: In function ‘paging32_walk_addr_generic’: > arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function > In file included from arch/x86/kvm/mmu.c:2852: > arch/x86/kvm/paging_tmpl.h: In function ‘paging64_walk_addr_generic’: > arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function > > when building -rc1. It looks like it is caused by > 6e2ca7d1802bf8ed9908435e34daa116662e7790 and sticking uninitialized_var() around > the ptep_user declaration looks like the easiest solution. But the code should > still be audited by someone who's familiar with it whether shutting up the > compiler doesn't cause an actual bug. Sorry, it is my commit. I think the logic guarantees that ptep_user won't be used until it is assigned some value. It seems to be safe, IIUC. Takuya -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
