1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d2bbe343fda7..e67b834279b2 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1048,6 +1048,13 @@ void __init setup_arch(char **cmdline_p)
         if (mtrr_trim_uncached_memory(max_pfn))
                 max_pfn = e820_end_of_ram_pfn();
 
+        /*
+         * This call is required when the CPU does not support PAT. If
+         * mtrr_bp_init() invoked it already via pat_init() the call has no
+         * effect.
+         */
+        init_cache_modes();
+
 #ifdef CONFIG_X86_32
         /* max_low_pfn get updated here */
         find_low_pfn_range();