x86: cpa, eliminate CPA_ enum

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 029fb07..fb2eedb 100644 (file)
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -27,11 +27,6 @@ struct cpa_data {
        int             flushtlb;
 };
 
-enum {
-       CPA_NO_SPLIT = 0,
-       CPA_SPLIT,
-};
-
 static inline int
 within(unsigned long addr, unsigned long start, unsigned long end)
 {
@@ -263,7 +258,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
        unsigned long nextpage_addr, numpages, pmask, psize, flags;
        pte_t new_pte, old_pte, *tmp;
        pgprot_t old_prot, new_prot;
-       int level, res = CPA_SPLIT;
+       int level, do_split = 1;
 
        /*
         * An Athlon 64 X2 showed hard hangs if we tried to preserve
@@ -274,7 +269,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
         * disable this code until the hang can be debugged:
         */
        if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
-               return res;
+               return 1;
 
        spin_lock_irqsave(&pgd_lock, flags);
        /*
@@ -297,7 +292,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
                break;
 #endif
        default:
-               res = -EINVAL;
+               do_split = -EINVAL;
                goto out_unlock;
        }
 
@@ -325,7 +320,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
         * above:
         */
        if (pgprot_val(new_prot) == pgprot_val(old_prot)) {
-               res = CPA_NO_SPLIT;
+               do_split = 0;
                goto out_unlock;
        }
 
@@ -345,13 +340,13 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
                new_pte = pfn_pte(pte_pfn(old_pte), canon_pgprot(new_prot));
                __set_pmd_pte(kpte, address, new_pte);
                cpa->flushtlb = 1;
-               res = CPA_NO_SPLIT;
+               do_split = 0;
        }
 
 out_unlock:
        spin_unlock_irqrestore(&pgd_lock, flags);
 
-       return res;
+       return do_split;
 }
 
 static int split_large_page(pte_t *kpte, unsigned long address)
@@ -429,7 +424,7 @@ out_unlock:
 static int __change_page_attr(unsigned long address, struct cpa_data *cpa)
 {
        struct page *kpte_page;
-       int level, res;
+       int level, do_split;
        pte_t *kpte;
 
 repeat:
@@ -480,25 +475,26 @@ repeat:
         * Check, whether we can keep the large page intact
         * and just change the pte:
         */
-       res = try_preserve_large_page(kpte, address, cpa);
-       if (res < 0)
-               return res;
+       do_split = try_preserve_large_page(kpte, address, cpa);
+       if (do_split < 0)
+               return do_split;
 
        /*
         * When the range fits into the existing large page,
         * return. cp->numpages and cpa->tlbflush have been updated in
         * try_large_page:
         */
-       if (res == CPA_NO_SPLIT)
+       if (do_split == 0)
                return 0;
 
        /*
         * We have to split the large page:
         */
-       res = split_large_page(kpte, address);
-       if (res)
-               return res;
+       do_split = split_large_page(kpte, address);
+       if (do_split)
+               return do_split;
        cpa->flushtlb = 1;
+
        goto repeat;
 }