linux-kernel - [PATCH 1/10] arch/arm/plat-omap: Drop unnecessary NULL test

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Message-ID: <Pine.LNX.4.64.0907191725060.16542@ask.diku.dk>
Date:	Sun, 19 Jul 2009 17:25:28 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	tony@...mide.com, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 1/10] arch/arm/plat-omap: Drop unnecessary NULL test

From: Julia Lawall <julia@...u.dk>

The function map_iovm_area is static and is only called from one place, at
which the "new" argument cannot be NULL.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
expression E,E1;
identifier i,fld;
statement S;
@@

- T i = E->fld;
+ T i;
  ... when != E=E1
      when != i
  if (E == NULL||...) S
+ i = E->fld;
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 arch/arm/plat-omap/iovmm.c          |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
index 2fce2c1..04e2286 100644
--- a/arch/arm/plat-omap/iovmm.c
+++ b/arch/arm/plat-omap/iovmm.c
@@ -447,7 +447,7 @@ static int map_iovm_area(struct iommu *obj, struct iovm_struct *new,
 	struct scatterlist *sg;
 	u32 da = new->da_start;
 
-	if (!obj || !new || !sgt)
+	if (!obj || !sgt)
 		return -EINVAL;
 
 	BUG_ON(!sgtable_ok(sgt));
--
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