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authorArnd Bergmann <arnd@arndb.de>2017-08-10 14:14:39 +0200
committerRadim Krčmář <rkrcmar@redhat.com>2017-08-15 18:56:14 +0200
commit076b925d51e83c1939bf796c4c5a33f482f986b3 (patch)
tree7b84ed68621b54e6c0a93c4a58c586bb66a6cf25 /virt
parentd3802286fa0f9886700f2e47c05876ddb86dcb77 (diff)
downloadlinux-076b925d51e83c1939bf796c4c5a33f482f986b3.tar.bz2
kvm: avoid uninitialized-variable warnings
When PAGE_OFFSET is not a compile-time constant, we run into warnings from the use of kvm_is_error_hva() that the compiler cannot optimize out: arch/arm/kvm/../../../virt/kvm/kvm_main.c: In function '__kvm_gfn_to_hva_cache_init': arch/arm/kvm/../../../virt/kvm/kvm_main.c:1978:14: error: 'nr_pages_avail' may be used uninitialized in this function [-Werror=maybe-uninitialized] arch/arm/kvm/../../../virt/kvm/kvm_main.c: In function 'gfn_to_page_many_atomic': arch/arm/kvm/../../../virt/kvm/kvm_main.c:1660:5: error: 'entry' may be used uninitialized in this function [-Werror=maybe-uninitialized] This adds fake initializations to the two instances I ran into. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e17c40d986f3..1b3fa3fc1a78 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1651,7 +1651,7 @@ int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
struct page **pages, int nr_pages)
{
unsigned long addr;
- gfn_t entry;
+ gfn_t entry = 0;
addr = gfn_to_hva_many(slot, gfn, &entry);
if (kvm_is_error_hva(addr))
@@ -1970,6 +1970,7 @@ static int __kvm_gfn_to_hva_cache_init(struct kvm_memslots *slots,
* verify that the entire region is valid here.
*/
while (start_gfn <= end_gfn) {
+ nr_pages_avail = 0;
ghc->memslot = __gfn_to_memslot(slots, start_gfn);
ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn,
&nr_pages_avail);