linux-kernel - [PATCH] mm, debug: mm-introduce-vm_bug_on

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Date:	Tue, 23 Sep 2014 11:24:39 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	mm-commits@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-next@...r.kernel.org, sfr@...b.auug.org.au,
	Sasha Levin <sasha.levin@...cle.com>
Subject: [PATCH] mm, debug: mm-introduce-vm_bug_on_mm-fix.patch

dump_mm wants to dump mm->owner even when CONFIG_MEMCG is not defined
which leads to a compilation error:
mm/debug.c: In function ‘dump_mm’:
mm/debug.c:212:5: error: ‘const struct mm_struct’ has no member named ‘owner’
   mm->owner, mm->exe_file,

Signed-off-by: Michal Hocko <mhocko@...e.cz>
---
 mm/debug.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mm/debug.c b/mm/debug.c
index 281abb2edddd..63aba9dcfb4e 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -181,7 +181,10 @@ void dump_mm(const struct mm_struct *mm)
 #ifdef CONFIG_AIO
 		"ioctx_table %p\n"
 #endif
-		"owner %p exe_file %p\n"
+#ifdef CONFIG_MEMCG
+		"owner %p "
+#endif
+		"exe_file %p\n"
 #ifdef CONFIG_MMU_NOTIFIER
 		"mmu_notifier_mm %p\n"
 #endif
@@ -209,7 +212,10 @@ void dump_mm(const struct mm_struct *mm)
 #ifdef CONFIG_AIO
 		mm->ioctx_table,
 #endif
-		mm->owner, mm->exe_file,
+#ifdef CONFIG_MEMCG
+		mm->owner,
+#endif
+		mm->exe_file,
 #ifdef CONFIG_MMU_NOTIFIER
 		mm->mmu_notifier_mm,
 #endif
-- 
2.1.0

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