revert: "x86: ioremap(), extend check to all RAM pages"

Vegard Nossum reported a large (150 seconds) boot delay during bootup,
and bisected it to "x86: ioremap(), extend check to all RAM pages"
(commit bdd3cee2e4b). Revert this commit for now.

Bisected-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 804de18abcc2..0be9f9c59aa6 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -148,8 +148,8 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
         /*
          * Don't allow anybody to remap normal RAM that we're using..
          */
-        for (pfn = phys_addr >> PAGE_SHIFT;
-                                (pfn << PAGE_SHIFT) < last_addr; pfn++) {
+        for (pfn = phys_addr >> PAGE_SHIFT; pfn < max_pfn_mapped &&
+                (pfn << PAGE_SHIFT) < last_addr; pfn++) {
 
                 int is_ram = page_is_ram(pfn);