From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Sat, 28 Jan 2023 00:06:40 +0000 (+0100)
Subject: libbpf: Simplify barrier_var()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e85465e420be1e408f9465f8b6fd9e2f7b17aea1;p=linux.git

libbpf: Simplify barrier_var()

Use a single "+r" constraint instead of the separate "=r" and "0".

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-22-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index d37c4fe2849d2..5ec1871acb2fc 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -109,7 +109,7 @@
  * This is a variable-specific variant of more global barrier().
  */
 #ifndef barrier_var
-#define barrier_var(var) asm volatile("" : "=r"(var) : "0"(var))
+#define barrier_var(var) asm volatile("" : "+r"(var))
 #endif
 
 /*