From: Matthew Wilcox <willy@infradead.org>
To: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
cl@linux.com, penberg@kernel.org, rientjes@google.com,
iamjoonsoo.kim@lge.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mm: kmalloc_index: make compiler break when size is not supported
Date: Mon, 10 May 2021 16:44:09 +0100 [thread overview]
Message-ID: <YJlUyc8t7MoGTFTe@casper.infradead.org> (raw)
In-Reply-To: <20210510150230.GA74915@hyeyoo>
On Tue, May 11, 2021 at 12:02:30AM +0900, Hyeonggon Yoo wrote:
> @@ -382,8 +385,8 @@ static __always_inline unsigned int kmalloc_index(size_t size)
> if (size <= 8 * 1024 * 1024) return 23;
> if (size <= 16 * 1024 * 1024) return 24;
> if (size <= 32 * 1024 * 1024) return 25;
> - if (size <= 64 * 1024 * 1024) return 26;
> - BUG();
> +
> + BUILD_BUG_ON_MSG(1, "unexpected size in kmalloc_index()");
we're being encouraged to use static_assert() these days.
https://en.cppreference.com/w/c/language/_Static_assert
next prev parent reply other threads:[~2021-05-10 15:45 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 22:13 [PATCH] mm: kmalloc_index: remove case when size is more than 32MB Hyeonggon Yoo
2021-05-08 23:19 ` Matthew Wilcox
2021-05-09 5:33 ` Hyeonggon Yoo
2021-05-10 10:09 ` Vlastimil Babka
2021-05-10 13:58 ` Hyeonggon Yoo
2021-05-10 14:04 ` Vlastimil Babka
2021-05-10 15:02 ` [PATCH v2] mm: kmalloc_index: make compiler break when size is not supported Hyeonggon Yoo
2021-05-10 15:15 ` Christoph Lameter
2021-05-10 15:21 ` Vlastimil Babka
2021-05-11 3:09 ` Hyeonggon Yoo
2021-05-10 15:19 ` Vlastimil Babka
2021-05-10 15:38 ` Hyeonggon Yoo
2021-05-11 8:36 ` Vlastimil Babka
2021-05-11 8:37 ` Vlastimil Babka
2021-05-11 9:14 ` Hyeonggon Yoo
2021-05-11 2:59 ` [PATCH v3] mm: change run-time assertion in kmalloc_index() to compile-time Hyeonggon Yoo
2021-05-10 15:44 ` Matthew Wilcox [this message]
2021-05-11 3:03 ` [PATCH v2] mm: kmalloc_index: make compiler break when size is not supported Hyeonggon Yoo
2021-05-11 8:33 ` Vlastimil Babka
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