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6727ad9e20
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Tested-by: Petr Mladek <pmladek@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
95 lines
2.1 KiB
ArmAsm
95 lines
2.1 KiB
ArmAsm
/* MN10300 Main kernel linker script
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#define __VMLINUX_LDS__
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/page.h>
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OUTPUT_FORMAT("elf32-am33lin", "elf32-am33lin", "elf32-am33lin")
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OUTPUT_ARCH(mn10300)
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ENTRY(_start)
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jiffies = jiffies_64;
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#ifndef CONFIG_MN10300_CURRENT_IN_E2
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current = __current;
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#endif
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SECTIONS
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{
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. = CONFIG_KERNEL_TEXT_ADDRESS;
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/* read-only */
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_stext = .;
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_text = .; /* Text and read-only data */
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.text : {
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HEAD_TEXT
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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*(.fixup)
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*(.gnu.warning)
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} = 0xcb
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_etext = .; /* End of text section */
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EXCEPTION_TABLE(16)
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BUG_TABLE
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RO_DATA(PAGE_SIZE)
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/* writeable */
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_sdata = .; /* Start of rw data section */
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RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE)
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_edata = .;
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/* might get freed after init */
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. = ALIGN(PAGE_SIZE);
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.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
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__smp_locks = .;
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*(.smp_locks)
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__smp_locks_end = .;
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}
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/* will be freed after init */
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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__init_begin = .;
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INIT_TEXT_SECTION(PAGE_SIZE)
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INIT_DATA_SECTION(16)
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. = ALIGN(4);
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__alt_instructions = .;
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.altinstructions : { *(.altinstructions) }
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__alt_instructions_end = .;
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.altinstr_replacement : { *(.altinstr_replacement) }
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/* .exit.text is discard at runtime, not link time, to deal with references
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from .altinstructions and .eh_frame */
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.exit.text : { EXIT_TEXT; }
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.exit.data : { EXIT_DATA; }
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PERCPU_SECTION(32)
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. = ALIGN(PAGE_SIZE);
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__init_end = .;
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/* freed after init ends here */
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BSS_SECTION(0, PAGE_SIZE, 4)
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_end = . ;
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/* This is where the kernel creates the early boot page tables */
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. = ALIGN(PAGE_SIZE);
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pg0 = .;
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STABS_DEBUG
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DWARF_DEBUG
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/* Sections to be discarded */
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DISCARDS
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}
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