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e683014c21
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Build testing revealed a couple implicit header usage issues that were fixed. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-5-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
267 lines
5.1 KiB
C
267 lines
5.1 KiB
C
#include <linux/export.h>
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#include <linux/preempt.h>
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#include <linux/smp.h>
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#include <asm/msr.h>
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static void __rdmsr_on_cpu(void *info)
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{
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struct msr_info *rv = info;
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struct msr *reg;
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int this_cpu = raw_smp_processor_id();
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if (rv->msrs)
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reg = per_cpu_ptr(rv->msrs, this_cpu);
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else
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reg = &rv->reg;
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rdmsr(rv->msr_no, reg->l, reg->h);
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}
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static void __wrmsr_on_cpu(void *info)
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{
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struct msr_info *rv = info;
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struct msr *reg;
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int this_cpu = raw_smp_processor_id();
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if (rv->msrs)
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reg = per_cpu_ptr(rv->msrs, this_cpu);
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else
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reg = &rv->reg;
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wrmsr(rv->msr_no, reg->l, reg->h);
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}
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int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
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*l = rv.reg.l;
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*h = rv.reg.h;
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return err;
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}
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EXPORT_SYMBOL(rdmsr_on_cpu);
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int rdmsrl_on_cpu(unsigned int cpu, u32 msr_no, u64 *q)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
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*q = rv.reg.q;
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return err;
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}
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EXPORT_SYMBOL(rdmsrl_on_cpu);
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int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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rv.reg.l = l;
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rv.reg.h = h;
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err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
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return err;
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}
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EXPORT_SYMBOL(wrmsr_on_cpu);
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int wrmsrl_on_cpu(unsigned int cpu, u32 msr_no, u64 q)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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rv.reg.q = q;
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err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
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return err;
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}
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EXPORT_SYMBOL(wrmsrl_on_cpu);
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static void __rwmsr_on_cpus(const struct cpumask *mask, u32 msr_no,
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struct msr *msrs,
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void (*msr_func) (void *info))
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{
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struct msr_info rv;
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int this_cpu;
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memset(&rv, 0, sizeof(rv));
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rv.msrs = msrs;
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rv.msr_no = msr_no;
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this_cpu = get_cpu();
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if (cpumask_test_cpu(this_cpu, mask))
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msr_func(&rv);
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smp_call_function_many(mask, msr_func, &rv, 1);
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put_cpu();
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}
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/* rdmsr on a bunch of CPUs
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*
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* @mask: which CPUs
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* @msr_no: which MSR
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* @msrs: array of MSR values
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*
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*/
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void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
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{
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__rwmsr_on_cpus(mask, msr_no, msrs, __rdmsr_on_cpu);
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}
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EXPORT_SYMBOL(rdmsr_on_cpus);
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/*
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* wrmsr on a bunch of CPUs
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*
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* @mask: which CPUs
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* @msr_no: which MSR
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* @msrs: array of MSR values
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*
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*/
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void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
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{
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__rwmsr_on_cpus(mask, msr_no, msrs, __wrmsr_on_cpu);
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}
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EXPORT_SYMBOL(wrmsr_on_cpus);
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/* These "safe" variants are slower and should be used when the target MSR
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may not actually exist. */
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static void __rdmsr_safe_on_cpu(void *info)
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{
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struct msr_info *rv = info;
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rv->err = rdmsr_safe(rv->msr_no, &rv->reg.l, &rv->reg.h);
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}
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static void __wrmsr_safe_on_cpu(void *info)
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{
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struct msr_info *rv = info;
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rv->err = wrmsr_safe(rv->msr_no, rv->reg.l, rv->reg.h);
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}
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int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
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*l = rv.reg.l;
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*h = rv.reg.h;
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(rdmsr_safe_on_cpu);
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int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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rv.reg.l = l;
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rv.reg.h = h;
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err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(wrmsr_safe_on_cpu);
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int wrmsrl_safe_on_cpu(unsigned int cpu, u32 msr_no, u64 q)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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rv.reg.q = q;
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err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(wrmsrl_safe_on_cpu);
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int rdmsrl_safe_on_cpu(unsigned int cpu, u32 msr_no, u64 *q)
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{
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int err;
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struct msr_info rv;
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memset(&rv, 0, sizeof(rv));
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rv.msr_no = msr_no;
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err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
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*q = rv.reg.q;
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(rdmsrl_safe_on_cpu);
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/*
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* These variants are significantly slower, but allows control over
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* the entire 32-bit GPR set.
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*/
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static void __rdmsr_safe_regs_on_cpu(void *info)
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{
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struct msr_regs_info *rv = info;
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rv->err = rdmsr_safe_regs(rv->regs);
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}
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static void __wrmsr_safe_regs_on_cpu(void *info)
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{
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struct msr_regs_info *rv = info;
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rv->err = wrmsr_safe_regs(rv->regs);
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}
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int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
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{
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int err;
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struct msr_regs_info rv;
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rv.regs = regs;
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rv.err = -EIO;
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err = smp_call_function_single(cpu, __rdmsr_safe_regs_on_cpu, &rv, 1);
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(rdmsr_safe_regs_on_cpu);
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int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
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{
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int err;
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struct msr_regs_info rv;
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rv.regs = regs;
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rv.err = -EIO;
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err = smp_call_function_single(cpu, __wrmsr_safe_regs_on_cpu, &rv, 1);
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return err ? err : rv.err;
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}
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EXPORT_SYMBOL(wrmsr_safe_regs_on_cpu);
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