Module Name: src
Committed By: riastradh
Date: Sun Dec 19 01:25:21 UTC 2021
Modified Files:
src/sys/external/bsd/drm2/include/linux: atomic.h
Log Message:
Kludgey xchg.
To generate a diff of this commit:
cvs rdiff -u -r1.22 -r1.23 src/sys/external/bsd/drm2/include/linux/atomic.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/external/bsd/drm2/include/linux/atomic.h
diff -u src/sys/external/bsd/drm2/include/linux/atomic.h:1.22 src/sys/external/bsd/drm2/include/linux/atomic.h:1.23
--- src/sys/external/bsd/drm2/include/linux/atomic.h:1.22 Fri Feb 14 14:34:59 2020
+++ src/sys/external/bsd/drm2/include/linux/atomic.h Sun Dec 19 01:25:21 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: atomic.h,v 1.22 2020/02/14 14:34:59 maya Exp $ */
+/* $NetBSD: atomic.h,v 1.23 2021/12/19 01:25:21 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -46,6 +46,11 @@
# define smp_mb__after_atomic() __insn_barrier()
#endif
+#define xchg(P, V) \
+ (sizeof(*(P)) == 4 ? atomic_swap_32((volatile uint32_t *)P, V) \
+ : sizeof(*(P)) == 8 ? atomic_swap_64((volatile uint64_t *)P, V) \
+ : (__builtin_abort(), 0))
+
/*
* atomic (u)int operations
*
