From nobody Tue Sep 30 21:15:35 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 CDA2C10780; Thu, 28 Dec 2023 16:58:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="HcWG7dvP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1703782695; x=1735318695; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3UeWqTc17b7iPzk1HVe/oYZDCXCyjBwLkhpNmmvXEjw=; b=HcWG7dvP1MycaW0AkFmXKH+k7N2UigDsmv+fQ94kJYfjEbpO4t87XBwb ISQ0FkV2KnttKjJQ6VNtDPlbezWND87Jk7OewrRVhfME3j31us2YZG5bX xSQkBpu8pxR2UqVZUjtEtltrPegKtqOuHH/zWlbRYldK/XRjJOxYyD87d pNlp5N27nrqWdj2miPFrbOwtFGn5ht1ZsmKRfifbH+LcQEWdnBi35sPdX pl+euJzuK0DuUqm/Lp/159mnXTHCXD1jcEuwZSEHGf7YnP2JaDxX+9DdH T9wNUWQpEtfL3MqOR6YMCqPmTXGdzJmVAx1wYB+Do7wQqa5dae3pCZTdU Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10937"; a="9958053" X-IronPort-AV: E=Sophos;i="6.04,312,1695711600"; d="scan'208";a="9958053" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Dec 2023 08:58:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10937"; a="951847238" X-IronPort-AV: E=Sophos;i="6.04,312,1695711600"; d="scan'208";a="951847238" Received: from ijarvine-desk1.ger.corp.intel.com (HELO localhost) ([10.94.250.171]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Dec 2023 08:58:09 -0800 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= To: linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Rob Herring , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Igor Mammedov , Lukas Wunner , Mika Westerberg , Andy Shevchenko , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Andy Shevchenko Subject: [PATCH v2 5/7] resource: Handle simple alignment inside __find_empty_resource_slot() Date: Thu, 28 Dec 2023 18:57:05 +0200 Message-Id: <20231228165707.3447-6-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20231228165707.3447-1-ilpo.jarvinen@linux.intel.com> References: <20231228165707.3447-1-ilpo.jarvinen@linux.intel.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="utf-8" Content-Transfer-Encoding: quoted-printable allocate_resource() accepts ->alignf() callback to perform custom alignment beyond constraint->align. If alignf is NULL, simple_align_resource() is used which only returns avail->start (no change). Using avail->start directly is natural and can be done with a conditional in __find_empty_resource_slot() instead which avoids unnecessarily using callback. It makes the code inside __find_empty_resource_slot() more obvious and removes the need for the caller to provide constraint->alignf unnecessarily. This is preparation for exporting find_empty_resource_slot(). Signed-off-by: Ilpo J=C3=A4rvinen Reviewed-by: Andy Shevchenko --- kernel/resource.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/kernel/resource.c b/kernel/resource.c index 9d7920104120..f0e4d57d0c35 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -563,14 +563,6 @@ void __weak arch_remove_reservations(struct resource *= avail) { } =20 -static resource_size_t simple_align_resource(void *data, - const struct resource *avail, - resource_size_t size, - resource_size_t align) -{ - return avail->start; -} - static void resource_clip(struct resource *res, resource_size_t min, resource_size_t max) { @@ -590,6 +582,7 @@ static int __find_empty_resource_slot(struct resource *= root, struct resource *ol { struct resource *this =3D root->child; struct resource tmp =3D *new, avail, alloc; + resource_alignf alignf =3D constraint->alignf; =20 tmp.start =3D root->start; /* @@ -618,8 +611,12 @@ static int __find_empty_resource_slot(struct resource = *root, struct resource *ol avail.flags =3D new->flags & ~IORESOURCE_UNSET; if (avail.start >=3D tmp.start) { alloc.flags =3D avail.flags; - alloc.start =3D constraint->alignf(constraint->alignf_data, &avail, - size, constraint->align); + if (alignf) { + alloc.start =3D alignf(constraint->alignf_data, + &avail, size, constraint->align); + } else { + alloc.start =3D avail.start; + } alloc.end =3D alloc.start + size - 1; if (alloc.start <=3D alloc.end && resource_contains(&avail, &alloc)) { @@ -730,9 +727,6 @@ int allocate_resource(struct resource *root, struct res= ource *new, int err; struct resource_constraint constraint; =20 - if (!alignf) - alignf =3D simple_align_resource; - constraint.min =3D min; constraint.max =3D max; constraint.align =3D align; --=20 2.30.2