linux-kernel - Re: [PATCH] arm: flush: check if the folio is reserved for IMO addresses

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Date: Fri, 23 Feb 2024 09:57:29 +0800
From: Yongqiang Liu <liuyongqiang13@...wei.com>
To: Matthew Wilcox <willy@...radead.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <yanaijie@...wei.com>,
	<zhangxiaoxu5@...wei.com>, <wangkefeng.wang@...wei.com>,
	<sunnanyong@...wei.com>, <linux@...linux.org.uk>, <rppt@...ux.ibm.com>,
	<linux-kernel@...r.kernel.org>, <keescook@...omium.org>, <arnd@...db.de>,
	<m.szyprowski@...sung.com>
Subject: Re: [PATCH] arm: flush: check if the folio is reserved for IMO
 addresses


在 2024/2/22 22:05, Matthew Wilcox 写道:
> On Thu, Feb 22, 2024 at 10:01:47PM +0800, Yongqiang Liu wrote:
>> @@ -296,6 +297,9 @@ void __sync_icache_dcache(pte_t pteval)
>>   		return;
>>   
>>   	folio = page_folio(pfn_to_page(pfn));
>> +	if (test_bit(PG_reserved, &folio->flags))
>> +		return;
> Why are you using PG_foo directly instead of the helpers?
>
> 	if (folio_test_reserved(folio))
> .
Sorry, I will send v2.