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authorRoss Zwisler <zwisler@google.com>2023-03-13 23:56:27 +0300
committerAlexei Starovoitov <ast@kernel.org>2023-03-14 07:51:30 +0300
commit27d7fdf06fdb84455ff585b58c8034e2fab42583 (patch)
tree6db438ddc306f32e69758cbcc1d69cbf3e10e298 /samples/bpf/ibumad_kern.c
parent9e36a204bd43553a9cd4bd574612cd9a5df791ea (diff)
downloadlinux-27d7fdf06fdb84455ff585b58c8034e2fab42583.tar.xz
bpf: use canonical ftrace path
The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing Many comments and samples in the bpf code still refer to this older debugfs path, so let's update them to avoid confusion. There are a few spots where the bpf code explicitly checks both tracefs and debugfs (tools/bpf/bpftool/tracelog.c and tools/lib/api/fs/fs.c) and I've left those alone so that the tools can continue to work with both paths. Signed-off-by: Ross Zwisler <zwisler@google.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20230313205628.1058720-2-zwisler@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples/bpf/ibumad_kern.c')
-rw-r--r--samples/bpf/ibumad_kern.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/samples/bpf/ibumad_kern.c b/samples/bpf/ibumad_kern.c
index 9b193231024a..f07474c72525 100644
--- a/samples/bpf/ibumad_kern.c
+++ b/samples/bpf/ibumad_kern.c
@@ -39,8 +39,8 @@ struct {
/* Taken from the current format defined in
* include/trace/events/ib_umad.h
* and
- * /sys/kernel/debug/tracing/events/ib_umad/ib_umad_read/format
- * /sys/kernel/debug/tracing/events/ib_umad/ib_umad_write/format
+ * /sys/kernel/tracing/events/ib_umad/ib_umad_read/format
+ * /sys/kernel/tracing/events/ib_umad/ib_umad_write/format
*/
struct ib_umad_rw_args {
u64 pad;