From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 234DC13C8E8 for ; Thu, 13 Jun 2024 07:55:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718265305; cv=none; b=sDBTkwodK1v5ofJWUvsb/UFtn596oB29YG/OSBWms7zvnW+IEwQkf6PK3Za6Yl/AsvGKVkfQNsvEkMAKLJRVZmRfGso+pm/QvIpQ6fib+D2CAV55/gSPzAVoOA52IJICmNxcXUmr+3s9BTlRkoIbqaBXCaf82bzJTtmwuQZEhPo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718265305; c=relaxed/simple; bh=CmIG8imGeZaXwDnz7QKfLYHvN3EVUyhIfBm5Xkc77Mc=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=cuGVro5i3Les+hCPTZ+tFvIvvPTaxqta3qR7TVimtRU1Kow/eRuuMlEXiuARIvjt70SlPniW3v4T6QGZsyZq6zF7U6ETrM9iWl3IVzcQ8tyvgRMJUyqUh/zbAkerWOhWOZYXTd6DnJg6eqypQRmebFYtQo8JO6DizZEiHpGddOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NsMMu7w2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="NsMMu7w2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57294C4AF4D; Thu, 13 Jun 2024 07:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718265304; bh=CmIG8imGeZaXwDnz7QKfLYHvN3EVUyhIfBm5Xkc77Mc=; h=Subject:To:Cc:From:Date:From; b=NsMMu7w23pXyfYMvV5CZO9881BJIVaXnxJ/tH+UDcfPs92Lul87k65t0O2eQsejXz Aeb5x7q9mRRtWq0SFZeRSqd+EtfdpNbiVGloDNzcIQ3BL3GyWCnHLO+YUv5CKyL7fs jt94ggKAyb6vPpf20CJAJtp8NCszNQOItDVMo3oY= Subject: FAILED: patch "[PATCH] mm/cma: drop incorrect alignment check in" failed to apply to 5.15-stable tree To: fvdl@google.com,akpm@linux-foundation.org,david@redhat.com,m.szyprowski@samsung.com,muchun.song@linux.dev,roman.gushchin@linux.dev,stable@vger.kernel.org Cc: From: Date: Thu, 13 Jun 2024 09:55:01 +0200 Message-ID: <2024061301-runt-mannish-7604@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x b174f139bdc8aaaf72f5b67ad1bd512c4868a87e # git commit -s git send-email --to '' --in-reply-to '2024061301-runt-mannish-7604@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: b174f139bdc8 ("mm/cma: drop incorrect alignment check in cma_init_reserved_mem") e16faf26780f ("cma: factor out minimum alignment requirement") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b174f139bdc8aaaf72f5b67ad1bd512c4868a87e Mon Sep 17 00:00:00 2001 From: Frank van der Linden Date: Thu, 4 Apr 2024 16:25:14 +0000 Subject: [PATCH] mm/cma: drop incorrect alignment check in cma_init_reserved_mem cma_init_reserved_mem uses IS_ALIGNED to check if the size represented by one bit in the cma allocation bitmask is aligned with CMA_MIN_ALIGNMENT_BYTES (pageblock size). However, this is too strict, as this will fail if order_per_bit > pageblock_order, which is a valid configuration. We could check IS_ALIGNED both ways, but since both numbers are powers of two, no check is needed at all. Link: https://lkml.kernel.org/r/20240404162515.527802-1-fvdl@google.com Fixes: de9e14eebf33 ("drivers: dma-contiguous: add initialization from device tree") Signed-off-by: Frank van der Linden Acked-by: David Hildenbrand Cc: Marek Szyprowski Cc: Muchun Song Cc: Roman Gushchin Cc: Signed-off-by: Andrew Morton diff --git a/mm/cma.c b/mm/cma.c index 01f5a8f71ddf..3e9724716bad 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -182,10 +182,6 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, if (!size || !memblock_is_region_reserved(base, size)) return -EINVAL; - /* alignment should be aligned with order_per_bit */ - if (!IS_ALIGNED(CMA_MIN_ALIGNMENT_PAGES, 1 << order_per_bit)) - return -EINVAL; - /* ensure minimal alignment required by mm core */ if (!IS_ALIGNED(base | size, CMA_MIN_ALIGNMENT_BYTES)) return -EINVAL;