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 A5B523F54B8; Tue, 17 Mar 2026 16:57:13 +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=1773766633; cv=none; b=Fa9neVNDo0Jz2i33zqSuHybwPiU4/LOfsdHi5hzysYRHpOvHLPAEUqol6adhtX8eZvIlxwYAQfrmXXsw+1J0MHash67mrWpuNaRkJdjS4T/b4wr3OakLIhLR65degoEgyxoinEGOUVuxFuyzWF+5NJiAr+cW5Oek73dDhh6K29w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773766633; c=relaxed/simple; bh=S7b2x+XCPU3hZXm9d9xUfsF2uL49ITfLzqYao4p5RE8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u0VyctOCOiNJkMGoJxvlzU6mtqbmkXUdA2sdlCRYBA1VHDrTrXuuEbW7CImppp6gOfDHNVjBzrr0Ik10IHZr1fqgMtnw1qIkuXy1m9yU7Me0K2DY8bCvRPGEuPYFMqokM0p2LZQ6eBfb2nveBO8VGR2QAC2tzoTgAr+9VfYZ/kA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jCvcqHBj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jCvcqHBj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AB8BDC2BCB4; Tue, 17 Mar 2026 16:57:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773766633; bh=S7b2x+XCPU3hZXm9d9xUfsF2uL49ITfLzqYao4p5RE8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jCvcqHBjzL3lu3EJ5SPQRk5NuzUuC9Fj6pxDzon+/Ch75acKDiD4ExWCHzKSe6+qj u/ZuFOgoddAAb299UuHlc0qCCIQIXTcXL1e1HMsvYmP+VH0FYHJCkahfLJf3pJqV1X JhSGAG8ez7/xsOL3Pw2yr5spDTXfAguZfBWr7NOycl9dZ41cHkvtmNA+RApcjcK56m KcMgORh+yhCGxDGacFTMfKa37B+6BUGtk/7t0Hmzz3NoYqsKdjm/wx/5AmC9Eq9Cgn +zKx5AiXEG9EcdM7j0VHxRfxxjvS03ZheB4k7eAoNR1p8mfDb5hyZmfPfk7fhS8nOK XqQGiBDJM6qaQ== From: "David Hildenbrand (Arm)" To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-cxl@vger.kernel.org, "David Hildenbrand (Arm)" , Andrew Morton , Oscar Salvador , Axel Rasmussen , Yuanchu Xie , Wei Xu , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Subject: [PATCH 03/14] mm/Kconfig: make CONFIG_MEMORY_HOTPLUG depend on CONFIG_SPARSEMEM_VMEMMAP Date: Tue, 17 Mar 2026 17:56:41 +0100 Message-ID: <20260317165652.99114-4-david@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260317165652.99114-1-david@kernel.org> References: <20260317165652.99114-1-david@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Ever since commit f8f03eb5f0f9 ("mm: stop making SPARSEMEM_VMEMMAP user-selectable"), an architecture that supports CONFIG_SPARSEMEM_VMEMMAP (by selecting SPARSEMEM_VMEMMAP_ENABLE) can no longer enable CONFIG_SPARSEMEM without CONFIG_SPARSEMEM_VMEMMAP. Right now, CONFIG_MEMORY_HOTPLUG is guarded by CONFIG_SPARSEMEM. However, CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG is only enabled by * arm64: which selects SPARSEMEM_VMEMMAP_ENABLE * loongarch: which selects SPARSEMEM_VMEMMAP_ENABLE * powerpc (64bit): which selects SPARSEMEM_VMEMMAP_ENABLE * riscv (64bit): which selects SPARSEMEM_VMEMMAP_ENABLE * s390 with SPARSEMEM: which selects SPARSEMEM_VMEMMAP_ENABLE * x86 (64bit): which selects SPARSEMEM_VMEMMAP_ENABLE So, we can make CONFIG_MEMORY_HOTPLUG depend on CONFIG_SPARSEMEM_VMEMMAP without affecting any setups. Signed-off-by: David Hildenbrand (Arm) --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/Kconfig b/mm/Kconfig index ebd8ea353687..c012944938a7 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -472,7 +472,7 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE menuconfig MEMORY_HOTPLUG bool "Memory hotplug" select MEMORY_ISOLATION - depends on SPARSEMEM + depends on SPARSEMEM_VMEMMAP depends on ARCH_ENABLE_MEMORY_HOTPLUG depends on 64BIT select NUMA_KEEP_MEMINFO if NUMA -- 2.43.0