From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw0-f51.google.com (mail-yw0-f51.google.com [209.85.213.51]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id A25F1B6FB6 for ; Tue, 31 Jan 2012 08:28:48 +1100 (EST) Received: by mail-yw0-f51.google.com with SMTP id o47so2113115yho.38 for ; Mon, 30 Jan 2012 13:28:48 -0800 (PST) Sender: Grant Likely From: Grant Likely To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [RFC] powerpc: Make SPARSE_IRQ required Date: Mon, 30 Jan 2012 11:02:19 -0700 Message-Id: <1327946539-17614-1-git-send-email-grant.likely@secretlab.ca> Cc: Thomas Gleixner , Rob Herring List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , All IRQs on powerpc are managed via irq_domain anyway, there isn't really any advantage to turning SPARSE_IRQ off, and it's the direction we want to take the kernel design anyway. This patch makes powerpc always use SPARSE_IRQ. On pseries_defconfig, SPARSE_IRQ adds only about 0x300 bytes to the .text sections, and removes about 0x20000 from the data section for the static irq_desc table. Signed-off-by: Grant Likely Cc: Rob Herring Cc: Ben Herrenschmidt Cc: Thomas Gleixner --- arch/powerpc/Kconfig | 2 +- arch/powerpc/kernel/irq.c | 4 ---- 2 files changed, 1 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 303703d..1aa840d 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -133,7 +133,7 @@ config PPC select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 select HAVE_GENERIC_HARDIRQS - select HAVE_SPARSE_IRQ + select SPARSE_IRQ select IRQ_PER_CPU select IRQ_DOMAIN select GENERIC_IRQ_SHOW diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index e3673ff..282fb39 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -93,10 +93,6 @@ extern int tau_interrupts(int); #ifdef CONFIG_PPC64 -#ifndef CONFIG_SPARSE_IRQ -EXPORT_SYMBOL(irq_desc); -#endif - int distribute_irqs = 1; static inline notrace unsigned long get_hard_enabled(void) -- 1.7.5.4