1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h
index 2e787d40d599..c7f2627385e7 100644
--- a/arch/arm/lib/bitops.h
+++ b/arch/arm/lib/bitops.h
@@ -18,12 +18,14 @@
         mov     r2, #1
         add     r1, r1, r0, lsr #3      @ Get byte offset
         mov     r3, r2, lsl r3          @ create mask
+        smp_dmb
 1:      ldrexb  r2, [r1]
         ands    r0, r2, r3              @ save old value of bit
         \instr  r2, r2, r3                      @ toggle bit
         strexb  ip, r2, [r1]
         cmp     ip, #0
         bne     1b
+        smp_dmb
         cmp     r0, #0
         movne   r0, #1
 2:      mov     pc, lr