From c39f52a9edc5e0687cbb54c08bcd78cf7fe26b62 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 3 May 2012 09:02:57 +0000 Subject: [PATCH] parisc: Use generic init_task Same code, except: The alignment of init_thread_union is handled via the linker script, so no point to have it with the data structure. The extra asm(".data") looks like a leftover from an asm to C conversion and is pointless. Use the generic version. Move the page table data to parisc/mm/init.c and get rid of parisc/../init_task.c Signed-off-by: Thomas Gleixner Cc: James E.J. Bottomley Link: http://lkml.kernel.org/r/20120503085035.150896946@linutronix.de --- arch/parisc/Kconfig | 1 + arch/parisc/kernel/init_task.c | 70 ------------------------------------------ arch/parisc/mm/init.c | 12 ++++++++ 3 files changed, 13 insertions(+), 70 deletions(-) delete mode 100644 arch/parisc/kernel/init_task.c diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index ddb8b24..4c6ca0d 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -18,6 +18,7 @@ config PARISC select IRQ_PER_CPU select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_SMP_IDLE_THREAD + select HAVE_GENERIC_INIT_TASK help The PA-RISC microprocessor is designed by Hewlett-Packard and used diff --git a/arch/parisc/kernel/init_task.c b/arch/parisc/kernel/init_task.c deleted file mode 100644 index 4a91e43..0000000 --- a/arch/parisc/kernel/init_task.c +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Static declaration of "init" task data structure. - * - * Copyright (C) 2000 Paul Bame - * Copyright (C) 2000-2001 John Marvin - * Copyright (C) 2001 Helge Deller - * Copyright (C) 2002 Matthew Wilcox - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -/* - * Initial task structure. - * - * We need to make sure that this is 16384-byte aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union __init_task_data - __attribute__((aligned(128))) = - { INIT_THREAD_INFO(init_task) }; - -#if PT_NLEVELS == 3 -/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout - * with the first pmd adjacent to the pgd and below it. gcc doesn't actually - * guarantee that global objects will be laid out in memory in the same order - * as the order of declaration, so put these in different sections and use - * the linker script to order them. */ -pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE))); -#endif - -pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE))); -pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE))); - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -EXPORT_SYMBOL(init_task); - -__asm__(".data"); -struct task_struct init_task = INIT_TASK(init_task); diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 82f364e..3ac462d 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -33,6 +33,18 @@ extern int data_start; +#if PT_NLEVELS == 3 +/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout + * with the first pmd adjacent to the pgd and below it. gcc doesn't actually + * guarantee that global objects will be laid out in memory in the same order + * as the order of declaration, so put these in different sections and use + * the linker script to order them. */ +pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE))); +#endif + +pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE))); +pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE))); + #ifdef CONFIG_DISCONTIGMEM struct node_map_data node_data[MAX_NUMNODES] __read_mostly; unsigned char pfnnid_map[PFNNID_MAP_MAX] __read_mostly; -- 2.7.4