Commit-ID: 2458e53ff74cd1063ed3e00459da1d35c559d369
Gitweb: https://git.kernel.org/tip/2458e53ff74cd1063ed3e00459da1d35c559d369
Author: Kirill A. Shutemov <[email protected]>
AuthorDate: Sat, 23 Jun 2018 01:08:41 +0300
Committer: Thomas Gleixner <[email protected]>
CommitDate: Sat, 23 Jun 2018 14:20:37 +0200
x86/mm: Fix 'no5lvl' handling
early_identify_cpu() has to use early version of pgtable_l5_enabled()
that doesn't rely on cpu_feature_enabled().
Defining USE_EARLY_PGTABLE_L5 before all includes does the trick.
I lost the define in one of reworks of the original patch.
Fixes: 372fddf70904 ("x86/mm: Introduce the 'no5lvl' kernel parameter")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Link:
https://lkml.kernel.org/r/[email protected]
---
arch/x86/kernel/cpu/common.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 0df7151cfef4..eb4cb3efd20e 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1,3 +1,6 @@
+/* cpu_feature_enabled() cannot be used this early */
+#define USE_EARLY_PGTABLE_L5
+
#include <linux/bootmem.h>
#include <linux/linkage.h>
#include <linux/bitops.h>
