linux-kernel - Re: [PATCH v4 2/2] bug: introduce ASSERT_VAR_CAN

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Message-ID: <20240326075606.GA10489@lst.de>
Date: Tue, 26 Mar 2024 08:56:06 +0100
From: Christoph Hellwig <hch@....de>
To: Petr Tesarik <petrtesarik@...weicloud.com>
Cc: Christoph Hellwig <hch@....de>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Robin Murphy <robin.murphy@....com>,
	Petr Tesarik <petr.tesarik1@...wei-partners.com>,
	Michael Kelley <mhklinux@...look.com>,
	Will Deacon <will@...nel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:DMA MAPPING HELPERS" <iommu@...ts.linux.dev>,
	Roberto Sassu <roberto.sassu@...weicloud.com>,
	Petr Tesarik <petr@...arici.cz>
Subject: Re: [PATCH v4 2/2] bug: introduce ASSERT_VAR_CAN_HOLD()

On Mon, Mar 25, 2024 at 09:31:05AM +0100, Petr Tesarik wrote:
> From: Petr Tesarik <petr.tesarik1@...wei-partners.com>
> 
> Introduce an ASSERT_VAR_CAN_HOLD() macro to check at build time that a
> variable can hold the given value.

This really should be run past whoever maintains build_bug.h and
also cc linux-kernel.  Please also split the addition and the user
in swiotlb into separate patches.

I plan to pick up patch 1 for now, and wait for the discussion on
this addition.