diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-02-14 21:25:41 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-02-16 10:48:49 +0100 |
| commit | 91f606a8fa68264224cbc76888fa8649cdbe9990 (patch) | |
| tree | 6aa21758fdeba04876a471b800c05975092bedf8 /arch/x86/mm/fault.c | |
| parent | 98219dda2ab56ce2a967fdebf81e838d676d9ddc (diff) | |
x86/mm: Replace compile-time checks for 5-level paging with runtime-time checks
This patch converts the of CONFIG_X86_5LEVEL check to runtime checks for
p4d folding.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180214182542.69302-9-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 800de815519c..321b78060e93 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -439,7 +439,7 @@ static noinline int vmalloc_fault(unsigned long address) if (pgd_none(*pgd_ref)) return -1; - if (CONFIG_PGTABLE_LEVELS > 4) { + if (pgtable_l5_enabled) { if (pgd_none(*pgd)) { set_pgd(pgd, *pgd_ref); arch_flush_lazy_mmu_mode(); @@ -454,7 +454,7 @@ static noinline int vmalloc_fault(unsigned long address) if (p4d_none(*p4d_ref)) return -1; - if (p4d_none(*p4d) && CONFIG_PGTABLE_LEVELS == 4) { + if (p4d_none(*p4d) && !pgtable_l5_enabled) { set_p4d(p4d, *p4d_ref); arch_flush_lazy_mmu_mode(); } else { |