x86: cpa, clean up code flow

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 fb2eedb..4f03350 100644 (file)
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -423,8 +423,8 @@ out_unlock:
 
 static int __change_page_attr(unsigned long address, struct cpa_data *cpa)
 {
+       int level, do_split, err;
        struct page *kpte_page;
-       int level, do_split;
        pte_t *kpte;
 
 repeat:
@@ -476,26 +476,24 @@ repeat:
         * and just change the pte:
         */
        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 (do_split == 0)
-               return 0;
+       if (do_split <= 0)
+               return do_split;
 
        /*
         * We have to split the large page:
         */
-       do_split = split_large_page(kpte, address);
-       if (do_split)
-               return do_split;
-       cpa->flushtlb = 1;
+       err = split_large_page(kpte, address);
+       if (!err) {
+               cpa->flushtlb = 1;
+               goto repeat;
+       }
 
-       goto repeat;
+       return err;
 }
 
 /**