linux-kernel - [PATCH 16/17] s390/debug: Improve determination of sizes in debug_info

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Date:   Sat, 3 Sep 2016 14:38:11 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-s390@...r.kernel.org,
        David Hildenbrand <dahi@...ux.vnet.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Joe Perches <joe@...ches.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 16/17] s390/debug: Improve determination of sizes in
 debug_info_alloc()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 2 Sep 2016 14:39:00 +0200

* Replace two multiplications by references for an array in a local
  data structure as the parameter for the operator "sizeof" to make
  the corresponding size determination a bit safer.

* Improve source code layout for one function call.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/s390/kernel/debug.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index ff8e705..408a8da 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -269,9 +269,8 @@ debug_info_alloc(const char *name, int pages_per_area, int nr_areas,
 	rc->buf_size       = buf_size;
 	rc->entry_size     = sizeof(debug_entry_t) + buf_size;
 	strlcpy(rc->name, name, sizeof(rc->name));
-	memset(rc->views, 0, DEBUG_MAX_VIEWS * sizeof(struct debug_view *));
-	memset(rc->debugfs_entries, 0, DEBUG_MAX_VIEWS *
-		sizeof(struct dentry*));
+	memset(rc->views, 0, sizeof(rc->views));
+	memset(rc->debugfs_entries, 0, sizeof(rc->debugfs_entries));
 	atomic_set(&(rc->ref_count), 0);
 
 	return rc;
-- 
2.9.3