[PATCH bpf-next] libbpf: fix build by renaming variables

* [PATCH bpf-next] libbpf: fix build by renaming variables
@ 2019-12-16  8:27 Prashant Bhole
  2019-12-16 10:19 ` Toke Høiland-Jørgensen
  2019-12-16 13:25 ` Daniel Borkmann
  0 siblings, 2 replies; 7+ messages in thread
From: Prashant Bhole @ 2019-12-16  8:27 UTC (permalink / raw)
  To: Alexei Starovoitov, Daniel Borkmann
  Cc: Prashant Bhole, Andrii Nakryiko, netdev, bpf

In btf__align_of() variable name 't' is shadowed by inner block
declaration of another variable with same name. Patch renames
variables in order to fix it.

  CC       sharedobjs/btf.o
btf.c: In function ‘btf__align_of’:
btf.c:303:21: error: declaration of ‘t’ shadows a previous local [-Werror=shadow]
  303 |   int i, align = 1, t;
      |                     ^
btf.c:283:25: note: shadowed declaration is here
  283 |  const struct btf_type *t = btf__type_by_id(btf, id);
      |

Fixes: 3d208f4ca111 ("libbpf: Expose btf__align_of() API")
Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail.com>
---
 tools/lib/bpf/btf.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 520021939d81..5f04f56e1eb6 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -300,16 +300,16 @@ int btf__align_of(const struct btf *btf, __u32 id)
 	case BTF_KIND_UNION: {
 		const struct btf_member *m = btf_members(t);
 		__u16 vlen = btf_vlen(t);
-		int i, align = 1, t;
+		int i, max_align = 1, align;
 
 		for (i = 0; i < vlen; i++, m++) {
-			t = btf__align_of(btf, m->type);
-			if (t <= 0)
-				return t;
-			align = max(align, t);
+			align = btf__align_of(btf, m->type);
+			if (align <= 0)
+				return align;
+			max_align = max(max_align, align);
 		}
 
-		return align;
+		return max_align;
 	}
 	default:
 		pr_warn("unsupported BTF_KIND:%u\n", btf_kind(t));
-- 
2.21.0


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