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charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <431dd956-ad31-4da8-ad42-34f7380824bb@app.fastmail.com> On Monday 02/19 at 07:21 +0100, Arnd Bergmann wrote: > On Mon, Feb 19, 2024, at 05:09, Calvin Owens wrote: > > 32-bit arm builds uniquely emit a lot of spam like this: > > > > fs/bcachefs/backpointers.c: In function ‘extent_matches_bp’: > > fs/bcachefs/backpointers.c:15:13: note: parameter passing for > > argument of type ‘struct bch_backpointer’ changed in GCC 9.1 > > > > Apply the arm64 change from commit ebcc5928c5d9 ("arm64: Silence gcc > > warnings about arch ABI drift") to silence them. It seems like Dave's > > original rationale applies here too. > > > > Cc: Dave Martin > > Signed-off-by: Calvin Owens > > --- > > I think these should be addressed in bcachefs instead. That seems reasonable to me. For clarity, I just happened to notice this while doing allyesconfig cross builds for something entirely unrelated. I'll take it up with them. It's not a big problem from my POV, the notes don't cause -Werror builds to fail or anything like that. Thanks, Calvin > While it's not the fault of bcachefs that the calling > convention changed between gcc versions, have a look at > the actual structure layout: > > struct bch_val { > __u64 __nothing[0]; > }; > struct bpos { > /* > * Word order matches machine byte order - btree code treats a bpos as a > * single large integer, for search/comparison purposes > * > * Note that wherever a bpos is embedded in another on disk data > * structure, it has to be byte swabbed when reading in metadata that > * wasn't written in native endian order: > */ > #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ > __u32 snapshot; > __u64 offset; > __u64 inode; > #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ > __u64 inode; > __u64 offset; /* Points to end of extent - sectors */ > __u32 snapshot; > #else > #error edit for your odd byteorder. > #endif > } __packed > struct bch_backpointer { > struct bch_val v; > __u8 btree_id; > __u8 level; > __u8 data_type; > __u64 bucket_offset:40; > __u32 bucket_len; > struct bpos pos; > } __packed __aligned(8); > > This is not something that should ever be passed by value > into a function. > > Arnd From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B5012C48BC3 for ; Mon, 19 Feb 2024 06:58:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nrmj7+mSg36ChHvfNy0X2NRKjtAZJR4ou2mKBGHZnvo=; 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