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>

diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c
index 60cfb687f97cb4117dd47b90ba9f000fc4625d96..4053832d4108419ac50effd4c7d8b780eb54eaf7 100644 (file)
--- 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));