From: Arnd Bergmann <arnd@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>
Cc: Arnd Bergmann <arnd@arndb.de>, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] bpf: fix -Wshadow warnings
Date: Mon, 26 Oct 2020 17:20:50 +0100 [thread overview]
Message-ID: <20201026162110.3710415-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
There are thousands of warnings about one macro in a W=2 build:
include/linux/filter.h:561:6: warning: declaration of 'ret' shadows a previous local [-Wshadow]
Prefix all the locals in that macro with __ to avoid most of
these warnings.
Fixes: 492ecee892c2 ("bpf: enable program stats")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
include/linux/filter.h | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 954f279fde01..20ba04583eaa 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -558,21 +558,21 @@ struct sk_filter {
DECLARE_STATIC_KEY_FALSE(bpf_stats_enabled_key);
#define __BPF_PROG_RUN(prog, ctx, dfunc) ({ \
- u32 ret; \
+ u32 __ret; \
cant_migrate(); \
if (static_branch_unlikely(&bpf_stats_enabled_key)) { \
- struct bpf_prog_stats *stats; \
- u64 start = sched_clock(); \
- ret = dfunc(ctx, (prog)->insnsi, (prog)->bpf_func); \
- stats = this_cpu_ptr(prog->aux->stats); \
- u64_stats_update_begin(&stats->syncp); \
- stats->cnt++; \
- stats->nsecs += sched_clock() - start; \
- u64_stats_update_end(&stats->syncp); \
+ struct bpf_prog_stats *__stats; \
+ u64 __start = sched_clock(); \
+ __ret = dfunc(ctx, (prog)->insnsi, (prog)->bpf_func); \
+ __stats = this_cpu_ptr(prog->aux->stats); \
+ u64_stats_update_begin(&__stats->syncp); \
+ __stats->cnt++; \
+ __stats->nsecs += sched_clock() - __start; \
+ u64_stats_update_end(&__stats->syncp); \
} else { \
- ret = dfunc(ctx, (prog)->insnsi, (prog)->bpf_func); \
+ __ret = dfunc(ctx, (prog)->insnsi, (prog)->bpf_func); \
} \
- ret; })
+ __ret; })
#define BPF_PROG_RUN(prog, ctx) \
__BPF_PROG_RUN(prog, ctx, bpf_dispatcher_nop_func)
--
2.27.0
next reply other threads:[~2020-10-26 16:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 16:20 Arnd Bergmann [this message]
2020-10-26 22:21 ` [PATCH] bpf: fix -Wshadow warnings Andrii Nakryiko
2020-10-27 16:10 ` patchwork-bot+netdevbpf
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