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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-12-11 15:58:16 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-12-11 15:58:16 +0300 |
| commit | 761bfc33dd7504de951aa7b9db27a3cc5df1fde6 (patch) | |
| tree | 93f4ac22fb206fe214998a599f4d2ea0214be70a /drivers/xen/events/events_base.c | |
| parent | 0f60a0bcc1b96d531fa623ab520f863f1292c75b (diff) | |
| parent | 6794862a16ef41f753abd75c03a152836e4c8028 (diff) | |
| download | linux-761bfc33dd7504de951aa7b9db27a3cc5df1fde6.tar.xz | |
Merge remote-tracking branch 'torvalds/master' into perf/urgent
To pick up BPF fixes to allow a clean 'make -C tools/perf build-test':
7c3977d1e804 libbpf: Fix sym->st_value print on 32-bit arches
1fd450f99272 libbpf: Fix up generation of bpf_helper_defs.h
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'drivers/xen/events/events_base.c')
| -rw-r--r-- | drivers/xen/events/events_base.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 6c8843968a52..499eff7d3f65 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1213,31 +1213,21 @@ void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector) notify_remote_via_irq(irq); } -static DEFINE_PER_CPU(unsigned, xed_nesting_count); - static void __xen_evtchn_do_upcall(void) { struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu); - int cpu = get_cpu(); - unsigned count; + int cpu = smp_processor_id(); do { vcpu_info->evtchn_upcall_pending = 0; - if (__this_cpu_inc_return(xed_nesting_count) - 1) - goto out; - xen_evtchn_handle_events(cpu); BUG_ON(!irqs_disabled()); - count = __this_cpu_read(xed_nesting_count); - __this_cpu_write(xed_nesting_count, 0); - } while (count != 1 || vcpu_info->evtchn_upcall_pending); - -out: + virt_rmb(); /* Hypervisor can set upcall pending. */ - put_cpu(); + } while (vcpu_info->evtchn_upcall_pending); } void xen_evtchn_do_upcall(struct pt_regs *regs) |