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Message-Id: <20210503180737.2487560-2-axelrasmussen@google.com>
Date:   Mon,  3 May 2021 11:07:28 -0700
From:   Axel Rasmussen <axelrasmussen@...gle.com>
To:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Joe Perches <joe@...ches.com>,
        Lokesh Gidra <lokeshgidra@...gle.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Peter Xu <peterx@...hat.com>, Shaohua Li <shli@...com>,
        Shuah Khan <shuah@...nel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Wang Qing <wangqing@...o.com>
Cc:     linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-mm@...ck.org, Axel Rasmussen <axelrasmussen@...gle.com>,
        Brian Geffon <bgeffon@...gle.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        Mina Almasry <almasrymina@...gle.com>,
        Oliver Upton <oupton@...gle.com>
Subject: [PATCH v6 01/10] userfaultfd/hugetlbfs: avoid including
 userfaultfd_k.h in hugetlb.h

Minimizing header file inclusion is desirable. In this case, we can do
so just by forward declaring the enumeration our signature relies upon.

Reviewed-by: Peter Xu <peterx@...hat.com>
Acked-by: Hugh Dickins <hughd@...gle.com>
Signed-off-by: Axel Rasmussen <axelrasmussen@...gle.com>
---
 include/linux/hugetlb.h | 2 +-
 mm/hugetlb.c            | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index b92f25ccef58..c98269e61ff6 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -11,11 +11,11 @@
 #include <linux/kref.h>
 #include <linux/pgtable.h>
 #include <linux/gfp.h>
-#include <linux/userfaultfd_k.h>
 
 struct ctl_table;
 struct user_struct;
 struct mmu_gather;
+enum mcopy_atomic_mode;
 
 #ifndef is_hugepd
 typedef struct { unsigned long pd; } hugepd_t;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3db405dea3dc..d2212cafd335 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -40,6 +40,7 @@
 #include <linux/hugetlb_cgroup.h>
 #include <linux/node.h>
 #include <linux/page_owner.h>
+#include <linux/userfaultfd_k.h>
 #include "internal.h"
 
 int hugetlb_max_hstate __read_mostly;
-- 
2.31.1.527.g47e6f16901-goog

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