linux-kernel - [PATCH v3 13/15] staging: ccree: fix array

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Date:   Sun, 23 Apr 2017 12:26:21 +0300
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org
Cc:     linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, gilad.benyossef@....com,
        Binoy Jayan <binoy.jayan@...aro.org>,
        Ofir Drang <ofir.drang@....com>,
        Stuart Yoder <stuart.yoder@....com>,
        Stephan Muller <smueller@...onox.de>,
        kbuild test robot <lkp@...el.com>,
        Fengguang Wu <fengguang.wu@...el.com>
Subject: [PATCH v3 13/15] staging: ccree: fix array_size.cocci warnings

From: kbuild test robot <lkp@...el.com>

drivers/staging/ccree/ssi_sysfs.c:319:34-35: WARNING: Use ARRAY_SIZE
drivers/staging/ccree/ssi_sysfs.c:429:34-35: WARNING: Use ARRAY_SIZE

 Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element

Semantic patch information:
 This makes an effort to find cases where ARRAY_SIZE can be used such as
 where there is a division of sizeof the array by the sizeof its first
 element or by any indexed element or the element type. It replaces the
 division of the two sizeofs by ARRAY_SIZE.

Generated by: scripts/coccinelle/misc/array_size.cocci

Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---
 drivers/staging/ccree/ssi_sysfs.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/ccree/ssi_sysfs.c b/drivers/staging/ccree/ssi_sysfs.c
index 6db7573..7c514c1 100644
--- a/drivers/staging/ccree/ssi_sysfs.c
+++ b/drivers/staging/ccree/ssi_sysfs.c
@@ -316,7 +316,7 @@ static ssize_t ssi_sys_help_show(struct kobject *kobj,
 	int i=0, offset = 0;
 
 	offset += scnprintf(buf + offset, PAGE_SIZE - offset, "Usage:\n");
-	for ( i = 0; i < (sizeof(help_str)/sizeof(help_str[0])); i+=2) {
+	for ( i = 0; i < ARRAY_SIZE(help_str); i+=2) {
 	   offset += scnprintf(buf + offset, PAGE_SIZE - offset, "%s\t\t%s\n", help_str[i], help_str[i+1]);
 	}
 	return offset;
@@ -426,8 +426,7 @@ int ssi_sysfs_init(struct kobject *sys_dev_obj, struct ssi_drvdata *drvdata)
 	/* Initialize top directory */
 	retval = sys_init_dir(&sys_top_dir, drvdata, sys_dev_obj,
 				"cc_info", ssi_sys_top_level_attrs,
-				sizeof(ssi_sys_top_level_attrs) /
-				sizeof(struct kobj_attribute));
+				ARRAY_SIZE(ssi_sys_top_level_attrs));
 	return retval;
 }
 
-- 
2.1.4