linux-kernel - [PATCH v2 19/21] KVM: MIPS: Drop @max param from mmu_topup_memory

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Message-Id: <20200622200822.4426-20-sean.j.christopherson@intel.com>
Date:   Mon, 22 Jun 2020 13:08:20 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Marc Zyngier <maz@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>,
        Arnd Bergmann <arnd@...db.de>
Cc:     James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-mips@...r.kernel.org, kvm@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ben Gardon <bgardon@...gle.com>,
        Peter Feiner <pfeiner@...gle.com>,
        Peter Shier <pshier@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Christoffer Dall <christoffer.dall@....com>
Subject: [PATCH v2 19/21] 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@...el.com>
---
 arch/mips/kvm/mmu.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index 7dad7a293eae..94562c54b930 100644
--- a/arch/mips/kvm/mmu.c
+++ b/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;
 
-- 
2.26.0