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 D22513BA248; Wed, 18 Mar 2026 10:59:47 +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=1773831588; cv=none; b=XIfRFGu+HXz43XL7I8ZMCmsG+jNQqFsq6BX/SW7PBhoyXhBycZIxDusnLRv+Hu7cRkXX33pqj05VoOjHR4mZ5h3SooDKhmMjI09GX8eqhv9tTU1+WR/rFybBZiOMTMvyDn4RSSwabY3UkU/JdlcFUjnwRmj3GtqD+F7UId12X7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773831588; c=relaxed/simple; bh=zHz96zz0ncBdc90iHfU1esNDP5VS2vFvp/Tz9M9XRk0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Fd2VxlBg33puFyq3NZV3/Bhw3kDd+uSnE6QIQCB9/BtLzf/SXRF7/2tBZ5b9DG5l5xPkdj3hyvgo5JnDOmlFyUmLYOArHLxr66zub5mYRdHnU+t6aVHu8+Ym5y/gZ0pjOLQbQeD2k47LNhL4/PM8JJ8ztoiF3UdU+ax3vl7ggOY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G+3CqX8k; 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="G+3CqX8k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19A1FC2BCC6; Wed, 18 Mar 2026 10:59:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773831587; bh=zHz96zz0ncBdc90iHfU1esNDP5VS2vFvp/Tz9M9XRk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G+3CqX8kLBmNikWLF7a8iVjXMFKms2g5d7cGj+DkSwb7SWZfJl3UUItFy/h005Dyb px8WulbFJMFk9CqcCuNJvWEv/rGujYRCx2LRV//5pAJM9mH2dWdmdTheM2VFzL4fRQ y8jRDky0b5dIJmL2lhrOXQG3ilJYoi1yOuBZKgPG03bS5GPsemT1iu8A5Zn8EVs1k1 KORZT0VeE8CibV/qbEteKg8rZeVO6pjmW8j8RmPunYEJIT5qfACmdTvXQzFne51AZG jjNVTjP9AFMX+Ii+jyxIlaK2lRkFLfqVjcg6XRabaz5r85dBmBz4jDrGVKYrPFx+vI 1IaEk9XK6tBNA== From: Mike Rapoport To: Andrew Morton Cc: Alexander Potapenko , Alexander Viro , Andreas Larsson , Ard Biesheuvel , Borislav Petkov , Brendan Jackman , "Christophe Leroy (CS GROUP)" , Catalin Marinas , Christian Brauner , "David S. Miller" , Dave Hansen , David Hildenbrand , Dmitry Vyukov , Ilias Apalodimas , Ingo Molnar , Jan Kara , Johannes Weiner , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Marco Elver , Marek Szyprowski , Masami Hiramatsu , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , "H. Peter Anvin" , Rob Herring , Robin Murphy , Saravana Kannan , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Zi Yan , devicetree@vger.kernel.org, iommu@lists.linux.dev, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH 6/8] memblock: make free_reserved_area() update memblock if ARCH_KEEP_MEMBLOCK=y Date: Wed, 18 Mar 2026 12:58:25 +0200 Message-ID: <20260318105827.1358927-7-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260318105827.1358927-1-rppt@kernel.org> References: <20260318105827.1358927-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Mike Rapoport (Microsoft)" On architectures that keep memblock after boot, freeing of reserved memory with free_reserved_area() is paired with an update of memblock arrays, usually by a call to memblock_free(). Make free_reserved_area() directly update memblock.reserved when ARCH_KEEP_MEMBLOCK is enabled. Remove the now-redundant explicit memblock_free() call from arm64::free_initmem() and the #ifdef CONFIG_ARCH_KEEP_MEMBLOCK block from the generic free_initrd_mem(). Signed-off-by: Mike Rapoport (Microsoft) --- arch/arm64/mm/init.c | 3 --- init/initramfs.c | 7 ------- mm/memblock.c | 6 ++++++ 3 files changed, 6 insertions(+), 10 deletions(-) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 96711b8578fd..07b17c708702 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -385,9 +385,6 @@ void free_initmem(void) WARN_ON(!IS_ALIGNED((unsigned long)lm_init_begin, PAGE_SIZE)); WARN_ON(!IS_ALIGNED((unsigned long)lm_init_end, PAGE_SIZE)); - /* Delete __init region from memblock.reserved. */ - memblock_free(lm_init_begin, lm_init_end - lm_init_begin); - free_reserved_area(lm_init_begin, lm_init_end, POISON_FREE_INITMEM, "unused kernel"); /* diff --git a/init/initramfs.c b/init/initramfs.c index 139baed06589..bca0922b2850 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -652,13 +652,6 @@ void __init reserve_initrd_mem(void) void __weak __init free_initrd_mem(unsigned long start, unsigned long end) { -#ifdef CONFIG_ARCH_KEEP_MEMBLOCK - unsigned long aligned_start = ALIGN_DOWN(start, PAGE_SIZE); - unsigned long aligned_end = ALIGN(end, PAGE_SIZE); - - memblock_free((void *)aligned_start, aligned_end - aligned_start); -#endif - free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, "initrd"); } diff --git a/mm/memblock.c b/mm/memblock.c index 87bd200a8cc9..9f372a8e82f7 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -942,6 +942,12 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char end_pa = __pa(end - 1) + 1; } + if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) { + if (start_pa < end_pa) + memblock_remove_range(&memblock.reserved, + start_pa, end_pa - start_pa); + } + pages = __free_reserved_area(start_pa, end_pa, poison); if (pages && s) pr_info("Freeing %s memory: %ldK\n", s, K(pages)); -- 2.51.0