KVM: x86: minor size optimization

Some fields can be constified and/or made static to reduce code and data
size.

Numbers for a 32 bit build:

        text    data     bss     dec     hex filename
before: 3351      80       0    3431     d67 cpuid.o
 after: 3391       0       0    3391     d3f cpuid.o

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index b496da684bd6..ec79e773342e 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -397,8 +397,8 @@ static int do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                 break;
         }
         case KVM_CPUID_SIGNATURE: {
-                char signature[12] = "KVMKVMKVM\0\0";
-                u32 *sigptr = (u32 *)signature;
+                static const char signature[12] = "KVMKVMKVM\0\0";
+                const u32 *sigptr = (const u32 *)signature;
                 entry->eax = KVM_CPUID_FEATURES;
                 entry->ebx = sigptr[0];
                 entry->ecx = sigptr[1];
@@ -484,10 +484,10 @@ struct kvm_cpuid_param {
         u32 func;
         u32 idx;
         bool has_leaf_count;
-        bool (*qualifier)(struct kvm_cpuid_param *param);
+        bool (*qualifier)(const struct kvm_cpuid_param *param);
 };
 
-static bool is_centaur_cpu(struct kvm_cpuid_param *param)
+static bool is_centaur_cpu(const struct kvm_cpuid_param *param)
 {
         return boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR;
 }
@@ -498,7 +498,7 @@ int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
         struct kvm_cpuid_entry2 *cpuid_entries;
         int limit, nent = 0, r = -E2BIG, i;
         u32 func;
-        static struct kvm_cpuid_param param[] = {
+        static const struct kvm_cpuid_param param[] = {
                 { .func = 0, .has_leaf_count = true },
                 { .func = 0x80000000, .has_leaf_count = true },
                 { .func = 0xC0000000, .qualifier = is_centaur_cpu, .has_leaf_count = true },
@@ -517,7 +517,7 @@ int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
 
         r = 0;
         for (i = 0; i < ARRAY_SIZE(param); i++) {
-                struct kvm_cpuid_param *ent = &param[i];
+                const struct kvm_cpuid_param *ent = &param[i];
 
                 if (ent->qualifier && !ent->qualifier(ent))
                         continue;