Module Name: src
Committed By: jmcneill
Date: Sun Sep 26 20:15:04 UTC 2021
Modified Files:
src/sys/arch/aarch64/include: lock.h
Log Message:
Use the yield instruction as SPINLOCK_BACKOFF_HOOK for aarch64.
To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/sys/arch/aarch64/include/lock.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/aarch64/include/lock.h
diff -u src/sys/arch/aarch64/include/lock.h:1.3 src/sys/arch/aarch64/include/lock.h:1.4
--- src/sys/arch/aarch64/include/lock.h:1.3 Fri Jun 26 18:27:52 2015
+++ src/sys/arch/aarch64/include/lock.h Sun Sep 26 20:15:04 2021
@@ -1,6 +1,12 @@
-/* $NetBSD: lock.h,v 1.3 2015/06/26 18:27:52 matt Exp $ */
+/* $NetBSD: lock.h,v 1.4 2021/09/26 20:15:04 jmcneill Exp $ */
#ifdef __aarch64__
+# ifdef _HARDKERNEL
+# ifdef SPINLOCK_BACKOFF_HOOK
+# undef SPINLOCK_BACKOFF_HOOK
+# endif
+# define SPINLOCK_BACKOFF_HOOK asm volatile("yield" ::: "memory")
+# endif
# include <sys/common_lock.h>
#elif defined(__arm__)
# include <arm/lock.h>
