KVM: Shrink struct kvm_mmu_memory_cache

Move the 'capacity' member around to make use of the padding hole on 64
bit systems instead of introducing yet another one.

This allows us to save 8 bytes per instance for 64 bit builds of which,
e.g., x86's struct kvm_vcpu_arch has a few.

Signed-off-by: Mathias Krause <minipli@grsecurity.net>
Link: https://lore.kernel.org/r/20230217193336.15278-3-minipli@grsecurity.net
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h
index 2728d49..6f4737d 100644 (file)
--- a/include/linux/kvm_types.h
+++ b/include/linux/kvm_types.h
@@ -91,11 +91,11 @@ struct gfn_to_pfn_cache {
  * is topped up (__kvm_mmu_topup_memory_cache()).
  */
 struct kvm_mmu_memory_cache {
-       int nobjs;
        gfp_t gfp_zero;
        gfp_t gfp_custom;
        struct kmem_cache *kmem_cache;
        int capacity;
+       int nobjs;
        void **objects;
 };
 #endif