From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752666AbcKGJWG (ORCPT ); Mon, 7 Nov 2016 04:22:06 -0500 Received: from foss.arm.com ([217.140.101.70]:58318 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752602AbcKGJWD (ORCPT ); Mon, 7 Nov 2016 04:22:03 -0500 From: Vladimir Murzin To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net Subject: [RESEND PATCH v1 2/6] irqchip/gic-v3-its: Narrow down Entry Size when used as a divider Date: Mon, 7 Nov 2016 09:21:18 +0000 Message-Id: <1478510482-15471-3-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1478510482-15471-1-git-send-email-vladimir.murzin@arm.com> References: <1478510482-15471-1-git-send-email-vladimir.murzin@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org GITS_BASER's Entry Size is much smaller than 64-bit, but when it used as a divider it forces compiler to generate __aeabi_uldivmod if build in 32-bit mode. So, casting it to int (like it is done in other places) where used as a divider would give a hint to compiler that 32-bit division can be used. Signed-off-by: Vladimir Murzin --- drivers/irqchip/irq-gic-v3-its.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index bca125e..312dd55 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -948,7 +948,7 @@ static int its_setup_baser(struct its_node *its, struct its_baser *baser, tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", - &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / tmp), + &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), its_base_type_string[type], (unsigned long)virt_to_phys(base), indirect ? "indirect" : "flat", (int)esz, @@ -983,7 +983,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser * which is reported by ITS hardware times lvl1 table * entry size. */ - ids -= ilog2(psz / esz); + ids -= ilog2(psz / (int)esz); esz = GITS_LVL1_ENTRY_SIZE; } } @@ -998,7 +998,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser new_order = max_t(u32, get_order(esz << ids), new_order); if (new_order >= MAX_ORDER) { new_order = MAX_ORDER - 1; - ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / esz); + ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); pr_warn("ITS@%pa: Device Table too large, reduce ids %u->%u\n", &its->phys_base, its->device_ids, ids); } -- 1.7.9.5