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-rw-r--r--drivers/xen/preempt.c42
1 files changed, 0 insertions, 42 deletions
diff --git a/drivers/xen/preempt.c b/drivers/xen/preempt.c
deleted file mode 100644
index 17240c5325a3..000000000000
--- a/drivers/xen/preempt.c
+++ /dev/null
@@ -1,42 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Preemptible hypercalls
- *
- * Copyright (C) 2014 Citrix Systems R&D ltd.
- */
-
-#include <linux/sched.h>
-#include <xen/xen-ops.h>
-
-#ifndef CONFIG_PREEMPTION
-
-/*
- * Some hypercalls issued by the toolstack can take many 10s of
- * seconds. Allow tasks running hypercalls via the privcmd driver to
- * be voluntarily preempted even if full kernel preemption is
- * disabled.
- *
- * Such preemptible hypercalls are bracketed by
- * xen_preemptible_hcall_begin() and xen_preemptible_hcall_end()
- * calls.
- */
-
-DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
-EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);
-
-asmlinkage __visible void xen_maybe_preempt_hcall(void)
-{
- if (unlikely(__this_cpu_read(xen_in_preemptible_hcall)
- && need_resched())) {
- /*
- * Clear flag as we may be rescheduled on a different
- * cpu.
- */
- __this_cpu_write(xen_in_preemptible_hcall, false);
- local_irq_enable();
- cond_resched();
- local_irq_disable();
- __this_cpu_write(xen_in_preemptible_hcall, true);
- }
-}
-#endif /* CONFIG_PREEMPTION */