078a55fc82
commit 3747069b25e419f6b51395f48127e9812abc3596 upstream.
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings. In any case, they are temporary and harmless.
Here, we remove all the MIPS __cpuinit from C code and __CPUINIT
from asm files. MIPS is interesting in this respect, because there
are also uasm users hiding behind their own renamed versions of the
__cpuinit macros.
[1] https://lkml.org/lkml/2013/5/20/589
[ralf@linux-mips.org: Folded in Paul's followup fix.]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5494/
Patchwork: https://patchwork.linux-mips.org/patch/5495/
Patchwork: https://patchwork.linux-mips.org/patch/5509/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
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*
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* Symmetric Uniprocessor (TM) Support
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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/*
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* Send inter-processor interrupt
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*/
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static void up_send_ipi_single(int cpu, unsigned int action)
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{
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panic(KERN_ERR "%s called", __func__);
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}
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static inline void up_send_ipi_mask(const struct cpumask *mask,
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unsigned int action)
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{
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panic(KERN_ERR "%s called", __func__);
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}
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/*
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* After we've done initial boot, this function is called to allow the
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* board code to clean up state, if needed
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*/
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static void up_init_secondary(void)
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{
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}
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static void up_smp_finish(void)
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{
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}
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/* Hook for after all CPUs are online */
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static void up_cpus_done(void)
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{
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}
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/*
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* Firmware CPU startup hook
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*/
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static void up_boot_secondary(int cpu, struct task_struct *idle)
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{
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}
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static void __init up_smp_setup(void)
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{
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}
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static void __init up_prepare_cpus(unsigned int max_cpus)
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{
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}
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#ifdef CONFIG_HOTPLUG_CPU
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static int up_cpu_disable(void)
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{
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return -ENOSYS;
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}
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static void up_cpu_die(unsigned int cpu)
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{
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BUG();
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}
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#endif
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struct plat_smp_ops up_smp_ops = {
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.send_ipi_single = up_send_ipi_single,
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.send_ipi_mask = up_send_ipi_mask,
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.init_secondary = up_init_secondary,
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.smp_finish = up_smp_finish,
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.cpus_done = up_cpus_done,
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.boot_secondary = up_boot_secondary,
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.smp_setup = up_smp_setup,
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.prepare_cpus = up_prepare_cpus,
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#ifdef CONFIG_HOTPLUG_CPU
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.cpu_disable = up_cpu_disable,
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.cpu_die = up_cpu_die,
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#endif
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};
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