Since af2cf278ef4f ("Don't remove PGD entries in remove_pagetable()")
we no longer cleanup stall pgd entries and thus the BUG_ON() inside
sync_global_pgds() is wrong.
This patch remove the BUG_ON() and unconditionaly update stall pgd
entries.
Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
arch/x86/mm/init_64.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index ff95fe8..36b9020 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -123,12 +123,7 @@ void sync_global_pgds(unsigned long start, unsigned long end)
pgt_lock = &pgd_page_get_mm(page)->page_table_lock;
spin_lock(pgt_lock);
- if (!p4d_none(*p4d_ref) && !p4d_none(*p4d))
- BUG_ON(p4d_page_vaddr(*p4d)
- != p4d_page_vaddr(*p4d_ref));
-
- if (p4d_none(*p4d))
- set_p4d(p4d, *p4d_ref);
+ set_p4d(p4d, *p4d_ref);
spin_unlock(pgt_lock);
}
--
2.9.4
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