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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-07-07 20:57:31 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-07-09 13:46:20 +0200 |
| commit | f7181e5aaab58d81c5453887e39a1e1041f6bb1a (patch) | |
| tree | 08865e07b556ae882496175f810d3af345424286 /tools | |
| parent | trace/kprobes: Sanitize derived event names (diff) | |
| download | linux-f7181e5aaab58d81c5453887e39a1e1041f6bb1a.tar.xz linux-f7181e5aaab58d81c5453887e39a1e1041f6bb1a.zip | |
selftests/ftrace: Update multiple kprobes test for powerpc
KPROBES_ON_FTRACE is only available on powerpc64le. Update comment to
clarify this.
Also, we should use an offset of 8 to ensure that the probe does not
fall on ftrace location. The current offset of 4 will fall before the
function local entry point and won't fire, while an offset of 12 or 16
will fall on ftrace location. Offset 8 is currently guaranteed to not be
the ftrace location.
Link: http://lkml.kernel.org/r/3d32e8fa076070e83527476fdfa3a747bb9a1a3a.1499453040.git.naveen.n.rao@linux.vnet.ibm.com
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc index f4d1ff785d67..2a1cb9908746 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc @@ -2,10 +2,10 @@ # description: Register/unregister many kprobe events # ftrace fentry skip size depends on the machine architecture. -# Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc +# Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc64le case `uname -m` in x86_64|i[3456]86) OFFS=5;; - ppc*) OFFS=4;; + ppc64le) OFFS=8;; *) OFFS=0;; esac |