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From:   Yu-cheng Yu <yu-cheng.yu@intel.com>
To:     x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
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Cc:     Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [PATCH v8 18/27] mm: Introduce do_mmap_locked()
Date:   Tue, 13 Aug 2019 13:52:16 -0700
Message-Id: <20190813205225.12032-19-yu-cheng.yu@intel.com>
In-Reply-To: <20190813205225.12032-1-yu-cheng.yu@intel.com>
References: <20190813205225.12032-1-yu-cheng.yu@intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

There are a few places that need do_mmap() with mm->mmap_sem held.
Create an in-line function for that.

Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
 include/linux/mm.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index bc58585014c9..275c385f53c6 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2394,6 +2394,24 @@ static inline void mm_populate(unsigned long addr, unsigned long len)
 static inline void mm_populate(unsigned long addr, unsigned long len) {}
 #endif
 
+static inline unsigned long do_mmap_locked(struct file *file,
+	unsigned long addr, unsigned long len, unsigned long prot,
+	unsigned long flags, vm_flags_t vm_flags, struct list_head *uf)
+{
+	struct mm_struct *mm = current->mm;
+	unsigned long populate;
+
+	down_write(&mm->mmap_sem);
+	addr = do_mmap(file, addr, len, prot, flags, vm_flags, 0,
+		       &populate, uf);
+	up_write(&mm->mmap_sem);
+
+	if (populate)
+		mm_populate(addr, populate);
+
+	return addr;
+}
+
 /* These take the mm semaphore themselves */
 extern int __must_check vm_brk(unsigned long, unsigned long);
 extern int __must_check vm_brk_flags(unsigned long, unsigned long, unsigned long);
-- 
2.17.1