mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 22:14:20 +08:00
abba759796
This eliminates the workaround that requires disabling -mprofile-kernel by default in Kconfig. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
28 lines
885 B
Bash
Executable File
28 lines
885 B
Bash
Executable File
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
set -e
|
|
set -o pipefail
|
|
|
|
# To debug, uncomment the following line
|
|
# set -x
|
|
|
|
# -mprofile-kernel is only supported on 64le, so this should not be invoked
|
|
# for other targets. Therefore we can pass in -m64 and -mlittle-endian
|
|
# explicitly, to take care of toolchains defaulting to other targets.
|
|
|
|
# Test whether the compile option -mprofile-kernel exists and generates
|
|
# profiling code (ie. a call to _mcount()).
|
|
echo "int func() { return 0; }" | \
|
|
$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \
|
|
2> /dev/null | grep -q "_mcount"
|
|
|
|
# Test whether the notrace attribute correctly suppresses calls to _mcount().
|
|
|
|
echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
|
|
$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \
|
|
2> /dev/null | grep -q "_mcount" && \
|
|
exit 1
|
|
|
|
exit 0
|