[PATCH 4 of 8] x86_64/setup: unconditionally populate the pgd

[Jeremy Fitzhardinge <jeremy@goop.org>]

When allocating a new pud, unconditionally populate the pgd (why did
we bother to create a new pud if we weren't going to populate it?).

This will only happen if the pgd slot was empty, since any existing
pud will be reused.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 arch/x86/mm/init_64.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -549,9 +549,8 @@
 
 		last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));
 		unmap_low_page(pud);
-		if (!after_bootmem)
-			pgd_populate(&init_mm, pgd_offset_k(start),
-				     __va(pud_phys));
+		pgd_populate(&init_mm, pgd_offset_k(start),
+			     __va(pud_phys));
 	}
 
 	if (!after_bootmem)