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>
135 lines
2.6 KiB
ArmAsm
135 lines
2.6 KiB
ArmAsm
/* ld script to make the Linux/CRIS kernel
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* Authors: Bjorn Wesen (bjornw@axis.com)
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*
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* It is VERY DANGEROUS to fiddle around with the symbols in this
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* script. It is for example quite vital that all generated sections
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* that are used are actually named here, otherwise the linker will
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* put them at the end, where the init stuff is which is FREED after
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* the kernel has booted.
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/page.h>
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#ifdef CONFIG_ETRAX_VMEM_SIZE
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#define __CONFIG_ETRAX_VMEM_SIZE CONFIG_ETRAX_VMEM_SIZE
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#else
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#define __CONFIG_ETRAX_VMEM_SIZE 0
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#endif
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jiffies = jiffies_64;
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SECTIONS
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{
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. = DRAM_VIRTUAL_BASE;
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dram_start = .;
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#ifdef CONFIG_ETRAX_ARCH_V10
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ibr_start = .;
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#else
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ebp_start = .;
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/* The boot section is only necessary until the VCS top */
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/* level testbench includes both flash and DRAM. */
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.boot : { *(.boot) }
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#endif
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/* see head.S and pages reserved at the start */
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. = DRAM_VIRTUAL_BASE + 0x4000;
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_text = .; /* Text and read-only data. */
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text_start = .; /* Lots of aliases. */
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_stext = .;
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__stext = .;
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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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*(.fixup)
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*(.text.__*)
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}
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_etext = . ; /* End of text section. */
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__etext = .;
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EXCEPTION_TABLE(4)
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_sdata = .;
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RODATA
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. = ALIGN (4);
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___data_start = . ;
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__Sdata = . ;
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.data : { /* Data */
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CACHELINE_ALIGNED_DATA(32)
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READ_MOSTLY_DATA(32)
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DATA_DATA
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}
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__edata = . ; /* End of data section. */
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_edata = . ;
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INIT_TASK_DATA_SECTION(PAGE_SIZE)
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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 : { INIT_DATA }
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.init.setup : { INIT_SETUP(16) }
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.initcall.init : {
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INIT_CALLS
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}
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.con_initcall.init : {
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CON_INITCALL
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}
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SECURITY_INIT
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/* .exit.text is discarded at runtime, not link time,
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* to deal with references from __bug_table
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*/
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.exit.text : {
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EXIT_TEXT
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}
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.exit.data : {
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EXIT_DATA
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}
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#ifdef CONFIG_ETRAX_ARCH_V10
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#ifdef CONFIG_BLK_DEV_INITRD
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.init.ramfs : {
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__initramfs_start = .;
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*(.init.ramfs)
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__initramfs_end = .;
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}
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#endif
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#endif
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__vmlinux_end = .; /* Last address of the physical file. */
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#ifdef CONFIG_ETRAX_ARCH_V32
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PERCPU_SECTION(32)
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.init.ramfs : {
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INIT_RAM_FS
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}
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#endif
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/*
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* We fill to the next page, so we can discard all init
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* pages without needing to consider what payload might be
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* appended to the kernel image.
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*/
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. = ALIGN(PAGE_SIZE);
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__init_end = .;
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__data_end = . ; /* Move to _edata ? */
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BSS_SECTION(1, 1, 1)
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. = ALIGN (0x20);
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_end = .;
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__end = .;
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dram_end = dram_start + (CONFIG_ETRAX_DRAM_SIZE - __CONFIG_ETRAX_VMEM_SIZE)*1024*1024;
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DISCARDS
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}
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