riscv: ftrace: Make function graph use ftrace directly

Browse source

Similar to commit 0c0593b45c ("x86/ftrace: Make function graph use
ftrace directly") and commit c4a0ebf87c ("arm64/ftrace: Make
function graph use ftrace directly"), RISC-V has no need for a special
graph tracer hook. The graph_ops::func function can be used to install
the return_hooker.

This cleanup only changes the FTRACE_WITH_REGS implementation, leaving
the mcount-based implementation is unaffected.

Perform the simplification, and also cleanup the register save/restore
macros.

Signed-off-by: Song Shuai <suagrfillet@gmail.com>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
Acked-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20231130121531.1178502-3-bjorn@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

...

This commit is contained in:

Song Shuai 2023-11-30 13:15:29 +01:00 • committed by Palmer Dabbelt

parent b546d6363a

commit 35e61e8827

No known key found for this signature in database

GPG key ID: 2E1319F35FBB1889

3 changed files with 175 additions and 56 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

11

arch/riscv/include/asm/ftrace.h

View file

30

arch/riscv/kernel/ftrace.c

View file

190

arch/riscv/kernel/mcount-dyn.S

View file