linux

iv/linux

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Leo Yan 6086919d8c perf trace: Return error if a system call doesn't exist

[ Upstream commit d4223e1776c30b2ce8d0e6eaadcbf696e60fca3c ]

When a system call is not detected, the reason is either because the
system call ID is out of scope or failure to find the corresponding path
in the sysfs, trace__read_syscall_info() returns zero.  Finally, without
returning an error value it introduces confusion for the caller.

This patch lets the function trace__read_syscall_info() to return
-EEXIST when a system call doesn't exist.

Fixes: b8b1033fcaa091d8 ("perf trace: Mark syscall ids that are not allocated to avoid unnecessary error messages")
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: bpf@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221121075237.127706-3-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-01-18 11:41:27 +01:00

accounting

tools/accounting/getdelays.c: fix netlink attribute length

2020-04-13 10:48:08 +02:00

arch

x86/speculation: Add RSB VM Exit protections

2022-10-07 09:16:56 +02:00

bpf

bpftool: Clear errno after libcap's checks

2022-10-26 13:22:48 +02:00

build

tools build: Switch to new openssl API for test-libcrypto