x86: 64-bit pageattr.c, prepare for unification

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

1 files changed, 8 insertions, 4 deletions

diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c
index 34acbcd62eb8..190d4d37bc2f 100644
--- a/arch/x86/mm/pageattr_64.c
+++ b/arch/x86/mm/pageattr_64.c
@@ -123,14 +123,15 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
 {
         int err = 0, kernel_map = 0, i;
 
+#ifdef CONFIG_X86_64
         if (address >= __START_KERNEL_map &&
                         address < __START_KERNEL_map + KERNEL_TEXT_SIZE) {
 
                 address = (unsigned long)__va(__pa(address));
                 kernel_map = 1;
         }
+#endif
 
-        down_write(&init_mm.mmap_sem);
         for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
                 unsigned long pfn = __pa(address) >> PAGE_SHIFT;
 
@@ -139,8 +140,11 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
                         if (err)
                                 break;
                 }
-                /* Handle kernel mapping too which aliases part of the
-                 * lowmem */
+#ifdef CONFIG_X86_64
+                /*
+                 * Handle kernel mapping too which aliases part of
+                 * lowmem:
+                 */
                 if (__pa(address) < KERNEL_TEXT_SIZE) {
                         unsigned long addr2;
                         pgprot_t prot2;
@@ -150,8 +154,8 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
                         prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot)));
                         err = __change_page_attr(addr2, pfn_to_page(pfn), prot2);
                 }
+#endif
         }
-        up_write(&init_mm.mmap_sem);
 
         return err;
 }