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Index: head/sys/arm64/arm64/exception.S
===================================================================
--- head/sys/arm64/arm64/exception.S
+++ head/sys/arm64/arm64/exception.S
@@ -100,10 +100,11 @@
.macro do_ast
/* Disable interrupts */
mrs x19, daif
+1:
msr daifset, #2
/* Read the current thread flags */
-1: ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */
+ ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */
ldr x2, [x1, #TD_FLAGS]
/* Check if we have either bits set */
@@ -120,9 +121,8 @@
mov x0, sp
bl _C_LABEL(ast)
- /* Disable interrupts */
- mrs x19, daif
- msr daifset, #2
+ /* Re-check for new ast scheduled */
+ b 1b
2:
/* Restore interrupts */

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