The IPI dispatch functions should already have the required barriers to
ensure correct memory ordering.
Note other callers of send_IPI_mask() don't use any barriers.
Reported-by: Andrew Cooper <andrew.coop...@citrix.com>
Signed-off-by: Roger Pau Monné <roger....@citrix.com>
---
Changes since v1:
- New in this version.
---
xen/arch/x86/traps.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index c94779b4ad4f..22f20629327d 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -785,8 +785,6 @@ void fatal_trap(const struct cpu_user_regs *regs, bool
show_remote)
cpumask_andnot(&show_state_mask, &cpu_online_map,
cpumask_of(smp_processor_id()));
set_nmi_callback(nmi_show_execution_state);
- /* Ensure new callback is set before sending out the NMI. */
- smp_wmb();
smp_send_nmi_allbutself();
/* Wait at most 10ms for some other CPU to respond. */
--
2.49.0
