[Minios-devel] [UNIKRAFT PATCHv2 1/7] arch/arm64: Implement a nop macro for timer API

[Jia He <justin.he@xxxxxxx>]

From: Wei Chen <wei.chen@xxxxxxx>

We will use this macro in timer_cpu_block_until function.
So we implement it in this patch.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
Signed-off-by: Jia He <justin.he@xxxxxxx>
---
 arch/arm/arm64/include/uk/asm/lcpu.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/arm64/include/uk/asm/lcpu.h 
b/arch/arm/arm64/include/uk/asm/lcpu.h
index 9eea746..6138d3b 100644
--- a/arch/arm/arm64/include/uk/asm/lcpu.h
+++ b/arch/arm/arm64/include/uk/asm/lcpu.h
@@ -110,6 +110,10 @@ struct __regs {
 #define wmb()   dsb(st) /* Full system memory barrier store */
 #endif
 
+#ifndef nop
+#define nop()   __asm__ __volatile__ ("nop" : : : "memory")
+#endif
+
 static inline unsigned long ukarch_read_sp(void)
 {
        unsigned long sp;
-- 
2.17.1


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