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[bpf-next,v2,21/31] libbpf: Simplify barrier_var()

Message ID 20230128000650.1516334-22-iii@linux.ibm.com (mailing list archive)
State Superseded
Commit e85465e420be1e408f9465f8b6fd9e2f7b17aea1
Delegated to: BPF
Headers show
Series Support bpf trampoline for s390x | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 8 maintainers not CCed: sdf@google.com kpsingh@kernel.org jolsa@kernel.org martin.lau@linux.dev song@kernel.org john.fastabend@gmail.com haoluo@google.com yhs@fb.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch fail ERROR: Macros with complex values should be enclosed in parentheses
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
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bpf/vmtest-bpf-next-PR success PR summary
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Commit Message

Ilya Leoshkevich Jan. 28, 2023, 12:06 a.m. UTC 
Use a single "+r" constraint instead of the separate "=r" and "0".

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tools/lib/bpf/bpf_helpers.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index d37c4fe2849d..5ec1871acb2f 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
 
 /*