KVM: MIPS: Drop @max param from mmu_topup_memory_cache()

Replace the @max param in mmu_topup_memory_cache() and instead use
ARRAY_SIZE() to terminate the loop to fill the cache.  This removes a
BUG_ON() and sets the stage for moving MIPS to the common memory cache
implementation.

No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703023545.8771-20-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/mips/kvm/mmu.c

@@ -25,15 +25,13 @@
 #define KVM_MMU_CACHE_MIN_PAGES 2
 #endif
 
-static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache,
-				  int min, int max)
+static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min)
 {
 	void *page;
 
-	BUG_ON(max > KVM_NR_MEM_OBJS);
 	if (cache->nobjs >= min)
 		return 0;
-	while (cache->nobjs < max) {
+	while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
 		page = (void *)__get_free_page(GFP_KERNEL);
 		if (!page)
 			return -ENOMEM;
@@ -711,8 +709,7 @@ static int kvm_mips_map_page(struct kvm_vcpu *vcpu, unsigned long gpa,
 		goto out;
 
 	/* We need a minimum of cached pages ready for page table creation */
-	err = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES,
-				     KVM_NR_MEM_OBJS);
+	err = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
 	if (err)
 		goto out;
 
@@ -796,8 +793,7 @@ static pte_t *kvm_trap_emul_pte_for_gva(struct kvm_vcpu *vcpu,
 	int ret;
 
 	/* We need a minimum of cached pages ready for page table creation */
-	ret = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES,
-				     KVM_NR_MEM_OBJS);
+	ret = mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
 	if (ret)
 		return NULL;