2 # SPDX-License-Identifier: GPL-2.0
7 # To debug, uncomment the following line
10 # -mprofile-kernel is only supported on 64-bit, so this should not be invoked
11 # for 32-bit. We pass in -m64 explicitly, and -mbig-endian and -mlittle-endian
12 # are passed in from Kconfig, which takes care of toolchains defaulting to
15 # Test whether the compile option -mprofile-kernel exists and generates
16 # profiling code (ie. a call to _mcount()).
17 echo "int func() { return 0; }" | \
18 $* -m64 -S -x c -O2 -p -mprofile-kernel - -o - \
19 2> /dev/null | grep -q "_mcount"
21 # Test whether the notrace attribute correctly suppresses calls to _mcount().
23 echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
24 $* -m64 -S -x c -O2 -p -mprofile-kernel - -o - \
25 2> /dev/null | grep -q "_mcount" && \