Merge branch 'x86/urgent' into x86/xen

Conflicts:
	arch/frv/include/asm/pgtable.h
	arch/x86/include/asm/required-features.h
	arch/x86/xen/mmu.c

Merge reason: x86/xen was on a .29 base still, move it to a fresher
              branch and pick up Xen fixes as well, plus resolve
              conflicts

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 77 insertions, 50 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 660cac75ae11..b81b41a0481f 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -931,71 +931,94 @@ int _set_memory_uc(unsigned long addr, int numpages)
 
 int set_memory_uc(unsigned long addr, int numpages)
 {
+        int ret;
+
         /*
          * for now UC MINUS. see comments in ioremap_nocache()
          */
-        if (reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
-                            _PAGE_CACHE_UC_MINUS, NULL))
-                return -EINVAL;
+        ret = reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
+                            _PAGE_CACHE_UC_MINUS, NULL);
+        if (ret)
+                goto out_err;
+
+        ret = _set_memory_uc(addr, numpages);
+        if (ret)
+                goto out_free;
 
-        return _set_memory_uc(addr, numpages);
+        return 0;
+
+out_free:
+        free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE);
+out_err:
+        return ret;
 }
 EXPORT_SYMBOL(set_memory_uc);
 
 int set_memory_array_uc(unsigned long *addr, int addrinarray)
 {
-        unsigned long start;
-        unsigned long end;
-        int i;
+        int i, j;
+        int ret;
+
         /*
          * for now UC MINUS. see comments in ioremap_nocache()
          */
         for (i = 0; i < addrinarray; i++) {
-                start = __pa(addr[i]);
-                for (end = start + PAGE_SIZE; i < addrinarray - 1; end += PAGE_SIZE) {
-                        if (end != __pa(addr[i + 1]))
-                                break;
-                        i++;
-                }
-                if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
-                        goto out;
+                ret = reserve_memtype(__pa(addr[i]), __pa(addr[i]) + PAGE_SIZE,
+                                        _PAGE_CACHE_UC_MINUS, NULL);
+                if (ret)
+                        goto out_free;
         }
 
-        return change_page_attr_set(addr, addrinarray,
+        ret = change_page_attr_set(addr, addrinarray,
                                     __pgprot(_PAGE_CACHE_UC_MINUS), 1);
-out:
-        for (i = 0; i < addrinarray; i++) {
-                unsigned long tmp = __pa(addr[i]);
-
-                if (tmp == start)
-                        break;
-                for (end = tmp + PAGE_SIZE; i < addrinarray - 1; end += PAGE_SIZE) {
-                        if (end != __pa(addr[i + 1]))
-                                break;
-                        i++;
-                }
-                free_memtype(tmp, end);
-        }
-        return -EINVAL;
+        if (ret)
+                goto out_free;
+
+        return 0;
+
+out_free:
+        for (j = 0; j < i; j++)
+                free_memtype(__pa(addr[j]), __pa(addr[j]) + PAGE_SIZE);
+
+        return ret;
 }
 EXPORT_SYMBOL(set_memory_array_uc);
 
 int _set_memory_wc(unsigned long addr, int numpages)
 {
-        return change_page_attr_set(&addr, numpages,
+        int ret;
+        ret = change_page_attr_set(&addr, numpages,
+                                    __pgprot(_PAGE_CACHE_UC_MINUS), 0);
+
+        if (!ret) {
+                ret = change_page_attr_set(&addr, numpages,
                                     __pgprot(_PAGE_CACHE_WC), 0);
+        }
+        return ret;
 }
 
 int set_memory_wc(unsigned long addr, int numpages)
 {
+        int ret;
+
         if (!pat_enabled)
                 return set_memory_uc(addr, numpages);
 
-        if (reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
-                _PAGE_CACHE_WC, NULL))
-                return -EINVAL;
+        ret = reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
+                _PAGE_CACHE_WC, NULL);
+        if (ret)
+                goto out_err;
+
+        ret = _set_memory_wc(addr, numpages);
+        if (ret)
+                goto out_free;
+
+        return 0;
 
-        return _set_memory_wc(addr, numpages);
+out_free:
+        free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE);
+out_err:
+        return ret;
 }
 EXPORT_SYMBOL(set_memory_wc);
 
@@ -1007,29 +1030,31 @@ int _set_memory_wb(unsigned long addr, int numpages)
 
 int set_memory_wb(unsigned long addr, int numpages)
 {
-        free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE);
+        int ret;
+
+        ret = _set_memory_wb(addr, numpages);
+        if (ret)
+                return ret;
 
-        return _set_memory_wb(addr, numpages);
+        free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE);
+        return 0;
 }
 EXPORT_SYMBOL(set_memory_wb);
 
 int set_memory_array_wb(unsigned long *addr, int addrinarray)
 {
         int i;
+        int ret;
 
-        for (i = 0; i < addrinarray; i++) {
-                unsigned long start = __pa(addr[i]);
-                unsigned long end;
-
-                for (end = start + PAGE_SIZE; i < addrinarray - 1; end += PAGE_SIZE) {
-                        if (end != __pa(addr[i + 1]))
-                                break;
-                        i++;
-                }
-                free_memtype(start, end);
-        }
-        return change_page_attr_clear(addr, addrinarray,
+        ret = change_page_attr_clear(addr, addrinarray,
                                       __pgprot(_PAGE_CACHE_MASK), 1);
+        if (ret)
+                return ret;
+
+        for (i = 0; i < addrinarray; i++)
+                free_memtype(__pa(addr[i]), __pa(addr[i]) + PAGE_SIZE);
+
+        return 0;
 }
 EXPORT_SYMBOL(set_memory_array_wb);
 
@@ -1122,6 +1147,8 @@ int set_pages_array_wb(struct page **pages, int addrinarray)
 
         retval = cpa_clear_pages_array(pages, addrinarray,
                         __pgprot(_PAGE_CACHE_MASK));
+        if (retval)
+                return retval;
 
         for (i = 0; i < addrinarray; i++) {
                 start = (unsigned long)page_address(pages[i]);
@@ -1129,7 +1156,7 @@ int set_pages_array_wb(struct page **pages, int addrinarray)
                 free_memtype(start, end);
         }
 
-        return retval;
+        return 0;
 }
 EXPORT_SYMBOL(set_pages_array_wb);