x86: cpa use the new set_clr function

Convert cpa_set and cpa_clear to call the new set_clr function.
Seperate out the debug helpers.

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

1 files changed, 20 insertions, 106 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index c54832b75069..7823adab96e4 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -321,116 +321,16 @@ static int change_page_attr_set_clr(unsigned long addr, int numpages,
         return ret;
 }
 
-/**
- * change_page_attr_set - Change page table attributes in the linear mapping.
- * @addr: Virtual address in linear mapping.
- * @numpages: Number of pages to change
- * @prot: Protection/caching type bits to set (PAGE_*)
- *
- * Returns 0 on success, otherwise a negated errno.
- *
- * This should be used when a page is mapped with a different caching policy
- * than write-back somewhere - some CPUs do not like it when mappings with
- * different caching policies exist. This changes the page attributes of the
- * in kernel linear mapping too.
- *
- * The caller needs to ensure that there are no conflicting mappings elsewhere
- * (e.g. in user space) * This function only deals with the kernel linear map.
- *
- * This function is different from change_page_attr() in that only selected bits
- * are impacted, all other bits remain as is.
- */
-static int __change_page_attr_set(unsigned long addr, int numpages,
-                                  pgprot_t prot)
+static inline int change_page_attr_set(unsigned long addr, int numpages,
+                                       pgprot_t mask)
 {
-        pgprot_t current_prot, new_prot;
-        int level;
-        pte_t *pte;
-        int i, ret;
-
-        for (i = 0; i < numpages ; i++) {
-
-                pte = lookup_address(addr, &level);
-                if (!pte)
-                        return -EINVAL;
-
-                current_prot = pte_pgprot(*pte);
-
-                pgprot_val(new_prot) =
-                        pgprot_val(current_prot) | pgprot_val(prot);
-
-                ret = change_page_attr_addr(addr, new_prot);
-                if (ret)
-                        return ret;
-                addr += PAGE_SIZE;
-        }
-
-        return 0;
+        return change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
 }
 
-static int change_page_attr_set(unsigned long addr, int numpages, pgprot_t prot)
+static inline int change_page_attr_clear(unsigned long addr, int numpages,
+                                         pgprot_t mask)
 {
-        int ret = __change_page_attr_set(addr, numpages, prot);
-
-        global_flush_tlb();
-        return ret;
-
-}
-
-/**
- * change_page_attr_clear - Change page table attributes in the linear mapping.
- * @addr: Virtual address in linear mapping.
- * @numpages: Number of pages to change
- * @prot: Protection/caching type bits to clear (PAGE_*)
- *
- * Returns 0 on success, otherwise a negated errno.
- *
- * This should be used when a page is mapped with a different caching policy
- * than write-back somewhere - some CPUs do not like it when mappings with
- * different caching policies exist. This changes the page attributes of the
- * in kernel linear mapping too.
- *
- * The caller needs to ensure that there are no conflicting mappings elsewhere
- * (e.g. in user space) * This function only deals with the kernel linear map.
- *
- * This function is different from change_page_attr() in that only selected bits
- * are impacted, all other bits remain as is.
- */
-static int __change_page_attr_clear(unsigned long addr, int numpages,
-                                    pgprot_t prot)
-{
-        pgprot_t current_prot, new_prot;
-        int level;
-        pte_t *pte;
-        int i, ret;
-
-        for (i = 0; i < numpages; i++) {
-
-                pte = lookup_address(addr, &level);
-                if (!pte)
-                        return -EINVAL;
-
-                current_prot = pte_pgprot(*pte);
-
-                pgprot_val(new_prot) =
-                                pgprot_val(current_prot) & ~pgprot_val(prot);
-
-                ret = change_page_attr_addr(addr, new_prot);
-                if (ret)
-                        return ret;
-                addr += PAGE_SIZE;
-        }
-
-        return 0;
-}
-
-static int change_page_attr_clear(unsigned long addr, int numpages,
-                                  pgprot_t prot)
-{
-        int ret = __change_page_attr_clear(addr, numpages, prot);
-
-        global_flush_tlb();
-        return ret;
+        return __change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
 
 }
 
@@ -522,6 +422,20 @@ int set_pages_rw(struct page *page, int numpages)
 }
 
 
+#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_CPA_DEBUG)
+static inline int __change_page_attr_set(unsigned long addr, int numpages,
+                                         pgprot_t mask)
+{
+        return __change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
+}
+
+static inline int __change_page_attr_clear(unsigned long addr, int numpages,
+                                           pgprot_t mask)
+{
+        return __change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
+}
+#endif
+
 #ifdef CONFIG_DEBUG_PAGEALLOC
 
 static int __set_pages_p(struct page *page, int numpages)