x86: sparse warnings in pageattr.c

Adjust the definition of lookup_address to take an unsigned long
level argument.  Adjust callers in xen/mmu.c that pass in a
dummy variable.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 9 insertions, 7 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 8493c855582b..eb2a54415a77 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -191,7 +191,7 @@ static inline pgprot_t static_protections(pgprot_t prot, unsigned long address)
  * or when the present bit is not set. Otherwise we would return a
  * pointer to a nonexisting mapping.
  */
-pte_t *lookup_address(unsigned long address, int *level)
+pte_t *lookup_address(unsigned long address, unsigned int *level)
 {
         pgd_t *pgd = pgd_offset_k(address);
         pud_t *pud;
@@ -255,7 +255,8 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
         unsigned long nextpage_addr, numpages, pmask, psize, flags;
         pte_t new_pte, old_pte, *tmp;
         pgprot_t old_prot, new_prot;
-        int level, do_split = 1;
+        int do_split = 1;
+        unsigned int level;
 
         spin_lock_irqsave(&pgd_lock, flags);
         /*
@@ -406,7 +407,8 @@ out_unlock:
 
 static int __change_page_attr(unsigned long address, struct cpa_data *cpa)
 {
-        int level, do_split, err;
+        int do_split, err;
+        unsigned int level;
         struct page *kpte_page;
         pte_t *kpte;
 
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 45aa771e73a9..0144395448ae 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -58,7 +58,7 @@
 
 xmaddr_t arbitrary_virt_to_machine(unsigned long address)
 {
-        int level;
+        unsigned int level;
         pte_t *pte = lookup_address(address, &level);
         unsigned offset = address & PAGE_MASK;
 
@@ -71,7 +71,7 @@ void make_lowmem_page_readonly(void *vaddr)
 {
         pte_t *pte, ptev;
         unsigned long address = (unsigned long)vaddr;
-        int level;
+        unsigned int level;
 
         pte = lookup_address(address, &level);
         BUG_ON(pte == NULL);
@@ -86,7 +86,7 @@ void make_lowmem_page_readwrite(void *vaddr)
 {
         pte_t *pte, ptev;
         unsigned long address = (unsigned long)vaddr;
-        int level;
+        unsigned int level;
 
         pte = lookup_address(address, &level);
         BUG_ON(pte == NULL);
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index 44c0a4f1b1eb..174b87738714 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -255,7 +255,7 @@ enum {
  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
  * as a pte too.
  */
-extern pte_t *lookup_address(unsigned long address, int *level);
+extern pte_t *lookup_address(unsigned long address, unsigned int *level);
 
 /* local pte updates need not use xchg for locking */
 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)