Some pvmmu functions store their commands on stack, and newer GCC
versions conclude that these commands are unused.
So stick an inline asm statement to convince the compiler otherwise.
Signed-off-by: Marcelo Tosatti <[EMAIL PROTECTED]>
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 8b7a3cf..c892752 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -55,6 +55,12 @@ static void kvm_mmu_op(void *buffer, unsigned len)
int r;
unsigned long a1, a2;
+ /*
+ * GCC 4.3.0 concludes that on-stack kvm_mmu_op* is unused and
+ * optimizes its initialization away.
+ */
+ asm ("" : : "p" (buffer));
+
do {
a1 = __pa(buffer);
a2 = 0; /* on i386 __pa() always returns <4G */
--
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