Re: [EXT] Re: [PATCH v2 1/1] tracing: Fix compile error in trace_array calls when TRACING is disabled

From: Bart Van Assche
Date: Wed Sep 07 2022 - 19:13:03 EST


On 9/7/22 15:52, Arun Easi wrote:
On Wed, 7 Sep 2022, 12:27pm, Bart Van Assche wrote:
+static inline int
+trace_array_printk(struct trace_array *tr, unsigned long ip,
+ const char *fmt, ...)

This is not the recommended way to format a function definition.

That was mostly a Y&P from the prototype earlier in the file. Is it the
linebreak after "int" you are referring to, or are there more?

In allmost all kernel code I have seen the function name is on the same line as the return type. Additionally, a common style is to align the second line with arguments with the opening parenthesis. From Documentation/process/coding-style.rst: "A very commonly used style
is to align descendants to a function open parenthesis."

Consider running git clang-format HEAD^.

It is a bit cryptic to me what it is complaining about (sorry
clang-format newbie here):

# git clang-format -v HEAD^
Running clang-format on the following files:
include/linux/trace.h
YAML:671:20: error: unknown enumerated scalar
SpaceBeforeParens: ControlStatementsExceptForEachMacros
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error reading /root/aeasi/src/mkp.git/.clang-format: Invalid argument
error: `clang-format -lines=29:30 -lines=51:84 include/linux/trace.h` failed

Perhaps my clang-tools are not recent enough.

# clang-format --version
clang-format version 10.0.1 (Red Hat 10.0.1-1.module+el8.3.0+7459+90c24896)

Still digging..

git clang-format HEAD^ reformats the topmost commit according to the rules in the .clang-format file in the top-level directory. Please review any changes made by that command before amending these to the original commit.

I think the error messages above indicate that your version of clang-format is too old.

Thanks,

Bart.