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bpf: Fix -Wshadow warnings 

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: 492ecee892 ("bpf: enable program stats")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20201026162110.3710415-1-arnd@kernel.org
This commit is contained in:
Arnd Bergmann 2020-10-26 17:20:50 +01:00 committed by Daniel Borkmann
parent 472547778d
commit 343a3e8bc6
1 changed files with 11 additions and 11 deletions
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22
include/linux/filter.h
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@ -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)