Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752503AbbF3OPj (ORCPT ); Tue, 30 Jun 2015 10:15:39 -0400 Received: from mail-wi0-f182.google.com ([209.85.212.182]:36850 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752693AbbF3OOU (ORCPT ); Tue, 30 Jun 2015 10:14:20 -0400 From: Robert Richter To: Marc Zygnier , Thomas Gleixner , Jason Cooper Cc: Tirumalesh Chalamarla , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Robert Richter Subject: [PATCH 1/4] irqchip, gicv3-its: Read typer register outside the loop Date: Tue, 30 Jun 2015 16:14:00 +0200 Message-Id: <1435673643-31676-2-git-send-email-rric@kernel.org> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1435673643-31676-1-git-send-email-rric@kernel.org> References: <1435673643-31676-1-git-send-email-rric@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1474 Lines: 40 From: Robert Richter No need to read the typer register in the loop. Values do not change. Signed-off-by: Robert Richter --- drivers/irqchip/irq-gic-v3-its.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 1b7e155869f6..c5ce21277920 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -803,6 +803,8 @@ static int its_alloc_tables(struct its_node *its) int psz = SZ_64K; u64 shr = GITS_BASER_InnerShareable; u64 cache = GITS_BASER_WaWb; + u64 typer = readq_relaxed(its->base + GITS_TYPER); + u32 ids = GITS_TYPER_DEVBITS(typer); for (i = 0; i < GITS_BASER_NR_REGS; i++) { u64 val = readq_relaxed(its->base + GITS_BASER + i * 8); @@ -825,9 +827,6 @@ static int its_alloc_tables(struct its_node *its) * For other tables, only allocate a single page. */ if (type == GITS_BASER_TYPE_DEVICE) { - u64 typer = readq_relaxed(its->base + GITS_TYPER); - u32 ids = GITS_TYPER_DEVBITS(typer); - /* * 'order' was initialized earlier to the default page * granule of the the ITS. We can't have an allocation -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/