From: k80c <k80ck80c@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Michel Lespinasse <walken@google.com>,
Rik van Riel <riel@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>,
Ingo Molnar <mingo@kernel.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
k80c <k80ck80c@gmail.com>
Subject: [PATCH 1/1] mmap.c: find_vma: eliminate initial if(mm) check
Date: Sun, 7 Apr 2013 14:48:12 +0530 [thread overview]
Message-ID: <1365326292-2761-1-git-send-email-k80ck80c@gmail.com> (raw)
As per commit 841e31e5cc6219d62054788faa289b6ed682d068,
we dont really need this if(mm) check anymore.
A WARN_ON_ONCE was added just for safety, but there have been no bug
reports about this so far.
Removing this if(mm) check.
Signed-off-by: k80c <k80ck80c@gmail.com>
---
mm/mmap.c | 3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 0db0de1..b2c363f 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1935,9 +1935,6 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
struct vm_area_struct *vma = NULL;
- if (WARN_ON_ONCE(!mm)) /* Remove this in linux-3.6 */
- return NULL;
-
/* Check the cache first. */
/* (Cache hit rate is typically around 35%.) */
vma = ACCESS_ONCE(mm->mmap_cache);
--
1.7.5.4
--
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next reply other threads:[~2013-04-07 9:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-07 9:18 k80c [this message]
2013-04-07 10:13 ` Michel Lespinasse
2013-04-07 13:49 ` Yanfei Zhang
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