x86: return -EINVAL in __change_page_attr(), instead of 0

careful: might change driver behavior - but this is the right
return value.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c
index 60cfb687f97c..4053832d4108 100644
--- a/arch/x86/mm/pageattr_64.c
+++ b/arch/x86/mm/pageattr_64.c
@@ -135,7 +135,7 @@ __change_page_attr(unsigned long address, struct page *page, pgprot_t prot)
 repeat:
         kpte = lookup_address(address, &level);
         if (!kpte)
-                return 0;
+                return -EINVAL;
 
         kpte_page = virt_to_page(kpte);
         BUG_ON(PageLRU(kpte_page));