From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 30 Jan 2008 12:34:08 +0000 (+0100)
Subject: x86: cpa use the new set_clr function
X-Git-Tag: MMI-PSA29.97-13-9~37629^2~36
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=56744546b3e5379177a70e7306c6283f727e4732;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

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>
---

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)