From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 63FE434F247 for ; Thu, 15 Oct 2026 06:42:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792046529; cv=none; b=lcSUrLbr1WpGP4JsYL+7bvG+3jAoSxT/SkjzZr10FYxYoGsaLazkkkp5qeqi5gxS55ortzNdqoEo48nMspt8FA23TlnUOk5agEBr9RFHXyltgtzBrluTIQkfx/oYVmm2X+L2d4+uFqKUXkamT34rI0MrO/SqG7ZyXVZqdwc756E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792046529; c=relaxed/simple; bh=3lAPBvS3FICeMeRxwRmZbW0Jb6e5f5IurhtPZFC4LK8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FKZYSAkHW7dpWrQHLIfu+jb2OPtmhkWT/bHh7hrZQi2ZU7zDQcvjdzARWDhJbTCAAD+10XfBmmkQDQ8t6IVAFJ316sxEAMgnn9ecdJBncG6euCeO0e+HYUIHBI0dKMkqHR7i9gBMhVtP6As69cGGD0L6ZbZs1hSbT873b7S2GsE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CN2NexLv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CN2NexLv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 835E01F000C5; Thu, 15 Oct 2026 06:42:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792046528; bh=itTJctx5woTFx1UjaaSxyhEraQjWD0N04fegW0vbHfs=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=CN2NexLvgNNPX8sikpjWrJgrR5wKMEQLpBaG0IsFIZHnYG9WF9nmHNamMsF5aldIt fOisBJr4bMZZP3kf4ZvgIlQalMUbLoDDwUSgHdhHG5W9A4e0cR/oljA9OLVK/4PNzE WsrfyOTPGcyXOkJSFJyoXg7NdVTMuaX+LZ/NjeS9Y95rehfFIFU3gBW9hM67Rn2spI kFZ9DCETqtoUnRAjy6yN3VcQk3bsvr3h2SPgZkgPvqdQ093Tj4O6Y/U3j/XiD7CGuF OZ5auFV5dDSyvYXejLbYgD3ihc8WUdyyNE47WrQ/ZJ4ErHUHjQfirPFOv67FxiOZSQ 7g+05vmfQ138A== Date: Thu, 15 Oct 2026 09:42:00 +0300 From: Mike Rapoport To: tarunsahu@google.com Cc: dmatlack@google.com, Pasha Tatashin , Andrew Morton , Pratyush Yadav , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 1/2] memblock: drop for_each_memblock_type() and open code its users Message-ID: References: <20261008190828.3221718-1-tarunsahu@google.com> <9huzecdt633e.fsf@tarunix.c.googlers.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9huzecdt633e.fsf@tarunix.c.googlers.com> On Tue, Oct 13, 2026 at 03:18:45PM +0000, tarunsahu@google.com wrote: > Mike Rapoport writes: > > > Hi Tarun, > > > > Please for the next time add the cover-letter when sending more than one > > patch. > > Thanks Mike for piking up the patches. > > Sure, I will take care of adding the cover-letter. > > You had some nit change suggestion, Let me know if you want > me send v5 or it is alright. I fixed some of it when applying and some right now, no need for v5 > ~Tarun > > > > > > On Thu, Oct 08, 2026 at 07:08:27PM +0000, Tarun Sahu wrote: > >> for_each_memblock_type() always starts the iteration at index 0 and its > >> body is a trivial 'for' loop, so it hides very little. It also gets in > >> the way of iterating from an arbitrary index, which the next patch > >> needs. > >> > >> Remove the macro and open code its three users: memblock_add_range(), > >> memblock_isolate_range() and memblock_dump(). While at it, move the > >> region pointer into the loop body scope. > >> > >> No functional change. > >> > >> Reviewed-by: Pratyush Yadav > >> Signed-off-by: Tarun Sahu > >> --- > >> mm/memblock.c | 17 ++++++----------- > >> 1 file changed, 6 insertions(+), 11 deletions(-) > >> > >> diff --git a/mm/memblock.c b/mm/memblock.c > >> index f5aaa38cfa31..59dda7d085f3 100644 > >> --- a/mm/memblock.c > >> +++ b/mm/memblock.c > >> @@ -155,11 +155,6 @@ struct memblock_type physmem = { > >> */ > >> static __refdata struct memblock_type *memblock_memory = &memblock.memory; > >> > >> -#define for_each_memblock_type(i, memblock_type, rgn) \ > >> - for (i = 0, rgn = &memblock_type->regions[0]; \ > >> - i < memblock_type->cnt; \ > >> - i++, rgn = &memblock_type->regions[i]) > >> - > >> #define memblock_dbg(fmt, ...) \ > >> do { \ > >> if (memblock_debug) \ > >> @@ -615,7 +610,6 @@ static int __init_memblock memblock_add_range(struct memblock_type *type, > >> phys_addr_t obase = base; > >> phys_addr_t end = base + memblock_cap_size(base, &size); > >> int idx, nr_new, start_rgn = -1, end_rgn; > >> - struct memblock_region *rgn; > >> > >> if (!size) > >> return 0; > >> @@ -651,7 +645,8 @@ static int __init_memblock memblock_add_range(struct memblock_type *type, > >> base = obase; > >> nr_new = 0; > >> > >> - for_each_memblock_type(idx, type, rgn) { > >> + for (idx = 0; idx < type->cnt; idx++) { > >> + struct memblock_region *rgn = &type->regions[idx]; > >> phys_addr_t rbase = rgn->base; > >> phys_addr_t rend = rbase + rgn->size; > >> > >> @@ -815,7 +810,6 @@ static int __init_memblock memblock_isolate_range(struct memblock_type *type, > >> { > >> phys_addr_t end = base + memblock_cap_size(base, &size); > >> int idx; > >> - struct memblock_region *rgn; > >> > >> *start_rgn = *end_rgn = 0; > >> > >> @@ -827,7 +821,8 @@ static int __init_memblock memblock_isolate_range(struct memblock_type *type, > >> if (memblock_double_array(type, base, size) < 0) > >> return -ENOMEM; > >> > >> - for_each_memblock_type(idx, type, rgn) { > >> + for (idx = 0; idx < type->cnt; idx++) { > >> + struct memblock_region *rgn = &type->regions[idx]; > >> phys_addr_t rbase = rgn->base; > >> phys_addr_t rend = rbase + rgn->size; > >> > >> @@ -2194,11 +2189,11 @@ static void __init_memblock memblock_dump(struct memblock_type *type) > >> phys_addr_t base, end, size; > >> enum memblock_flags flags; > >> int idx; > >> - struct memblock_region *rgn; > >> > >> pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); > >> > >> - for_each_memblock_type(idx, type, rgn) { > >> + for (idx = 0; idx < type->cnt; idx++) { > >> + struct memblock_region *rgn = &type->regions[idx]; > >> char nid_buf[32] = ""; > >> > >> base = rgn->base; > >> -- > >> 2.56.0.385.gd3acb90ef8-goog > >> > > > > -- > > Sincerely yours, > > Mike. -- Sincerely yours, Mike.