linux-kernel - [RFC PATCH 4/8] mm: nommu: add atomic parameter to do

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Message-Id: <1521581486-99134-5-git-send-email-yang.shi@linux.alibaba.com>
Date:   Wed, 21 Mar 2018 05:31:22 +0800
From:   Yang Shi <yang.shi@...ux.alibaba.com>
To:     akpm@...ux-foundation.org
Cc:     yang.shi@...ux.alibaba.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 4/8] mm: nommu: add atomic parameter to do_munmap()

Just add atomic parameter to keep consistent with the API change and
pass "true" to the call site. Nommu code doesn't do the mmap_sem
unlock/relock.

Signed-off-by: Yang Shi <yang.shi@...ux.alibaba.com>
---
 mm/nommu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/nommu.c b/mm/nommu.c
index ebb6e61..5954c08 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1578,7 +1578,8 @@ static int shrink_vma(struct mm_struct *mm,
  * - under NOMMU conditions the chunk to be unmapped must be backed by a single
  *   VMA, though it need not cover the whole VMA
  */
-int do_munmap(struct mm_struct *mm, unsigned long start, size_t len, struct list_head *uf)
+int do_munmap(struct mm_struct *mm, unsigned long start, size_t len,
+	      struct list_head *ufi, bool atomic)
 {
 	struct vm_area_struct *vma;
 	unsigned long end;
@@ -1644,7 +1645,7 @@ int vm_munmap(unsigned long addr, size_t len)
 	int ret;
 
 	down_write(&mm->mmap_sem);
-	ret = do_munmap(mm, addr, len, NULL);
+	ret = do_munmap(mm, addr, len, NULL, true);
 	up_write(&mm->mmap_sem);
 	return ret;
 }
-- 
1.8.3.1