diff options
| author | Hengqi Chen <hengqi.chen@gmail.com> | 2025-10-02 22:39:52 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-15 12:04:19 +0200 |
| commit | 7ad3d6a3c96184e74a739fa18e9ffbd639889905 (patch) | |
| tree | ea5467e283bb72a4e3a4df5b28bd6b27a9ca9389 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 1232e91c0abc83158447ac989cfee3ed1f68ad30 (diff) | |
LoongArch: BPF: No text_poke() for kernel text
commit 3d770bd11b943066db11dba7be0b6f0d81cb5d50 upstream.
The current implementation of bpf_arch_text_poke() requires 5 nops
at patch site which is not applicable for kernel/module functions.
Because LoongArch reserves ONLY 2 nops at the function entry. With
CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y, this can be done by ftrace
instead.
See the following commit for details:
* commit b91e014f078e ("bpf: Make BPF trampoline use register_ftrace_direct() API")
* commit 9cdc3b6a299c ("LoongArch: ftrace: Add direct call support")
Cc: stable@vger.kernel.org
Tested-by: Vincent Li <vincent.mc.li@gmail.com>
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions