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x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE

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The scheduler IPI does not need the full interrupt entry handling logic
when the entry is from kernel mode. Use IDTENTRY_SYSVEC_SIMPLE and spare
all the overhead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202119.835425642@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-05-21 22:05:45 +02:00
parent cb09ea2924
commit 13cad9851e
9 changed files with 7 additions and 63 deletions
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17
arch/x86/kernel/tracepoint.c
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@@ -25,20 +25,3 @@ void trace_pagefault_unreg(void)
{
static_branch_dec(&trace_pagefault_key);
}
#ifdef CONFIG_SMP
DEFINE_STATIC_KEY_FALSE(trace_resched_ipi_key);
int trace_resched_ipi_reg(void)
{
static_branch_inc(&trace_resched_ipi_key);
return 0;
}
void trace_resched_ipi_unreg(void)
{
static_branch_dec(&trace_resched_ipi_key);
}
#endif