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Message-ID: <803ef005-c5af-0682-7aa2-cff1fda5a85e@gmail.com> Date: Wed, 10 Apr 2019 21:21:59 -0700 From: Frank Rowand <frowand.list@...il.com> To: xiaojiangfeng <xiaojiangfeng@...wei.com>, "robh+dt@...nel.org" <robh+dt@...nel.org>, "robh@...nel.org" <robh@...nel.org> Cc: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: \\ 答复: [PATCH] of: del redundant type conversion On 4/10/19 9:13 PM, Frank Rowand wrote: > On 4/10/19 6:51 PM, xiaojiangfeng wrote: >> My pleasure. >> >> I am very new to sparse. >> >> I guess the warning is caused by the macro min. > > I think the warning is likely because the type of data is 'void *'. > > Removing the (int) cast is a good fix, but does not resolve > the sparse warning. Let me correct myself. When I ran sparse, I see the removing min() does eliminate the sparse warning. I'm not sure why, so I'll go dig a little deeper. -Frank > > -Frank > > >> Then I submitted my changes. >> >> Thanks for code review. >> >> >> -----邮件原件----- >> 发件人: Frank Rowand [mailto:frowand.list@...il.com] >> 发送时间: 2019年4月11日 2:50 >> 收件人: xiaojiangfeng <xiaojiangfeng@...wei.com>; robh+dt@...nel.org; robh@...nel.org >> 抄送: devicetree@...r.kernel.org; linux-kernel@...r.kernel.org >> 主题: Re: [PATCH] of: del redundant type conversion >> >> On 4/10/19 1:29 AM, xiaojiangfeng wrote: >>> The type of variable l in early_init_dt_scan_chosen is int, there is >>> no need to convert to int. >>> >>> Signed-off-by: xiaojiangfeng <xiaojiangfeng@...wei.com> >>> --- >>> drivers/of/fdt.c | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index >>> 4734223..de893c9 100644 >>> --- a/drivers/of/fdt.c >>> +++ b/drivers/of/fdt.c >>> @@ -1091,7 +1091,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname, >>> /* Retrieve command line */ >>> p = of_get_flat_dt_prop(node, "bootargs", &l); >>> if (p != NULL && l > 0) >>> - strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE)); >>> + strlcpy(data, p, min(l, COMMAND_LINE_SIZE)); >>> >>> /* >>> * CONFIG_CMDLINE is meant to be a default in case nothing else >>> >> >> Thanks for catching the redundant cast. >> >> There is a second problem detected by sparse on that line: >> >> drivers/of/fdt.c:1094:34: warning: expression using sizeof(void) >> >> Can you please fix both issues? >> >> Thanks, >> >> Frank >> > >
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