x86: make various pageattr.c functions static

change_page_attr_add is only used in pageattr.c now, so we can
make this function static.
change_page_attr() isn't used anywere at all anymore; this function
is a really bad API anyway so just remove the bloat entirely.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/mm/Makefile_32

@@ -4,7 +4,6 @@
 
 obj-y	:= init_32.o pgtable_32.o fault_32.o ioremap.o extable.o pageattr.o mmap.o
 
-obj-$(CONFIG_CPA_DEBUG) += pageattr-test.o
 obj-$(CONFIG_NUMA) += discontig_32.o
 obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
 obj-$(CONFIG_HIGHMEM) += highmem_32.o

arch/x86/mm/Makefile_64

@@ -7,4 +7,3 @@ obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
 obj-$(CONFIG_NUMA) += numa_64.o
 obj-$(CONFIG_K8_NUMA) += k8topology_64.o
 obj-$(CONFIG_ACPI_NUMA) += srat_64.o
-obj-$(CONFIG_CPA_DEBUG) += pageattr-test.o

arch/x86/mm/pageattr.c

@@ -210,7 +210,8 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot)
  * Modules and drivers should use the set_memory_* APIs instead.
  */
 
-int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
+static int change_page_attr_addr(unsigned long address, int numpages,
+								pgprot_t prot)
 {
 	int err = 0, kernel_map = 0, i;
 
@@ -251,36 +252,6 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
 	return err;
 }
 
-/**
- * change_page_attr - Change page table attributes in the linear mapping.
- * @page: First page to change
- * @numpages: Number of pages to change
- * @prot: New protection/caching type (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.
- *
- * Caller must call global_flush_tlb() later to make the changes active.
- *
- * 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.
- *
- * For MMIO areas without mem_map use change_page_attr_addr() instead.
- *
- * Modules and drivers should use the set_pages_* APIs instead.
- */
-int change_page_attr(struct page *page, int numpages, pgprot_t prot)
-{
-	unsigned long addr = (unsigned long)page_address(page);
-
-	return change_page_attr_addr(addr, numpages, prot);
-}
-EXPORT_UNUSED_SYMBOL(change_page_attr); /* to be removed in 2.6.27 */
-
 /**
  * change_page_attr_set - Change page table attributes in the linear mapping.
  * @addr: Virtual address in linear mapping.
@@ -294,15 +265,14 @@ EXPORT_UNUSED_SYMBOL(change_page_attr); /* to be removed in 2.6.27 */
  * different caching policies exist. This changes the page attributes of the
  * in kernel linear mapping too.
  *
- * Caller must call global_flush_tlb() later to make the changes active.
- *
  * 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.
  */
-int change_page_attr_set(unsigned long addr, int numpages, pgprot_t prot)
+static int change_page_attr_set(unsigned long addr, int numpages,
+								pgprot_t prot)
 {
 	pgprot_t current_prot;
 	int level;
@@ -332,15 +302,14 @@ int change_page_attr_set(unsigned long addr, int numpages, pgprot_t prot)
  * different caching policies exist. This changes the page attributes of the
  * in kernel linear mapping too.
  *
- * Caller must call global_flush_tlb() later to make the changes active.
- *
  * 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.
  */
-int change_page_attr_clear(unsigned long addr, int numpages, pgprot_t prot)
+static int change_page_attr_clear(unsigned long addr, int numpages,
+								pgprot_t prot)
 {
 	pgprot_t current_prot;
 	int level;
@@ -549,3 +518,11 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 	__flush_tlb_all();
 }
 #endif
+
+/*
+ * The testcases use internal knowledge of the implementation that shouldn't
+ * be exposed to the rest of the kernel. Include these directly here.
+ */
+#ifdef CONFIG_CPA_DEBUG
+#include "pageattr-test.c"
+#endif

include/asm-x86/cacheflush.h

@@ -27,7 +27,6 @@
 void global_flush_tlb(void);
 int __deprecated_for_modules change_page_attr(struct page *page, int numpages,
 								pgprot_t prot);
-int change_page_attr_addr(unsigned long addr, int numpages, pgprot_t prot);
 
 int set_pages_uc(struct page *page, int numpages);
 int set_pages_wb(struct page *page, int numpages);