linux-kernel - [PATCH 4/4] mm: do not add nr_pmds into mm

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Date:	Wed, 28 Jan 2015 15:17:44 +0200
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 4/4] mm: do not add nr_pmds into mm_struct if PMD is folded

Everything seems in place. We can now include <asm/pgtable.h> in
<linux/mm_struct.h>.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 include/linux/mm_struct.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mm_struct.h b/include/linux/mm_struct.h
index 0a233c232a39..1759bed3dc61 100644
--- a/include/linux/mm_struct.h
+++ b/include/linux/mm_struct.h
@@ -8,6 +8,7 @@
 #include <linux/uprobes.h>
 
 #include <asm/mmu.h>
+#include <asm/pgtable.h>
 
 struct kioctx_table;
 struct vm_area_struct;
@@ -54,7 +55,9 @@ 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 !__PAGETABLE_PMD_FOLDED
 	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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