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Alan Maguire 300b973af4 libbpf: Silence uninitialized warning/error in btf_dump_dump_type_data 
[ Upstream commit 43174f0d45 ]

When compiling libbpf with gcc 4.8.5, we see:

  CC       staticobjs/btf_dump.o
btf_dump.c: In function ‘btf_dump_dump_type_data.isra.24’:
btf_dump.c:2296:5: error: ‘err’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  if (err < 0)
     ^
cc1: all warnings being treated as errors
make: *** [staticobjs/btf_dump.o] Error 1

While gcc 4.8.5 is too old to build the upstream kernel, it's possible it
could be used to build standalone libbpf which suffers from the same problem.
Silence the error by initializing 'err' to 0.  The warning/error seems to be
a false positive since err is set early in the function.  Regardless we
shouldn't prevent libbpf from building for this.

Fixes: 920d16af9b ("libbpf: BTF dumper support for typed data")
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1638180040-8037-1-git-send-email-alan.maguire@oracle.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-01-27 11:03:18 +01:00
..
api tools api fs: Cache cgroupfs mount point 2021-02-17 15:09:08 -03:00
bpf libbpf: Silence uninitialized warning/error in btf_dump_dump_type_data 2022-01-27 11:03:18 +01:00
lockdep .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
perf libperf tests: Fix test_stat_cpu 2021-10-14 15:41:35 -03:00
subcmd libsubcmd: add OPT_UINTEGER_OPTARG option type 2021-08-31 15:44:05 -03:00
symbol libsymbols kallsyms: Move hex2u64 out of header 2020-05-05 16:35:32 -03:00
traceevent KVM: x86/mmu: Rename "nxe" role bit to "efer_nx" for macro shenanigans 2021-06-24 18:00:41 -04:00
argv_split.c tools lib: Move argv_{split,free} from tools/perf/util/ 2019-07-01 22:50:40 -03:00
bitmap.c tools lib: Adopt bitmap_intersects() operation from the kernel sources 2021-06-30 15:28:00 -03:00
ctype.c tools perf: Move from sane_ctype.h obtained from git to the Linux's original 2019-06-25 21:02:47 -03:00
find_bit.c tools: sync lib/find_bit implementation 2021-05-06 19:24:12 -07:00
hweight.c
rbtree.c tools/: replace HTTP links with HTTPS ones 2020-08-07 11:33:21 -07:00
str_error_r.c
string.c tools lib: Adopt memchr_inv() from kernel 2020-11-27 08:34:52 -03:00
vsprintf.c
zalloc.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00