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libbpf: Simplify barrier_var()

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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>
This commit is contained in:
Ilya Leoshkevich 2023-01-28 01:06:40 +01:00 committed by Alexei Starovoitov
parent 1b5e385325
commit e85465e420
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/bpf_helpers.h
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@ -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
/*