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Subject[PATCH 19/19] mm: do not add nr_pmds into mm_struct if PMD is folded
Date
CONFIG_PGTABLE_LEVELS is now available on every architecture and we can
use it to check if we need to add nr_pmds into mm_struct.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
include/linux/mm_types.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 199a03aab8dc..590630eb59ba 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -364,7 +364,9 @@ struct mm_struct {
atomic_t mm_users; /* How many users with user space? */
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
atomic_long_t nr_ptes; /* PTE page table pages */
+#if CONFIG_PGTABLE_LEVELS > 2
atomic_long_t nr_pmds; /* PMD page table pages */
+#endif
int map_count; /* number of VMAs */

spinlock_t page_table_lock; /* Protects page tables and some counters */
--
2.1.4


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