diff options
| author | Charlie Jenkins <charlie@rivosinc.com> | 2025-03-20 10:29:22 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-04-29 08:27:10 +0200 |
| commit | 5b3d6103b343d59e19bd641e4c31df519f4d250d (patch) | |
| tree | 3e89ac9f105aae0076ea48372caabe02e6dd2491 /arch/riscv/include | |
| parent | f955aa8723a65759e920d4de8e5d076cef412afc (diff) | |
riscv: entry: Split ret_from_fork() into user and kernel
This function was unified into a single function in commit ab9164dae273
("riscv: entry: Consolidate ret_from_kernel_thread into ret_from_fork").
However that imposed a performance degradation.
Partially reverting this commit to have ret_from_fork() split again,
results in a 1% increase on the number of times fork is able to be called
per second.
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/all/20250320-riscv_optimize_entry-v6-2-63e187e26041@rivosinc.com
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/asm-prototypes.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h index 733ff6097787..bfc8ea5f9319 100644 --- a/arch/riscv/include/asm/asm-prototypes.h +++ b/arch/riscv/include/asm/asm-prototypes.h @@ -52,7 +52,8 @@ DECLARE_DO_ERROR_INFO(do_trap_ecall_s); DECLARE_DO_ERROR_INFO(do_trap_ecall_m); DECLARE_DO_ERROR_INFO(do_trap_break); -asmlinkage void ret_from_fork(void *fn_arg, int (*fn)(void *), struct pt_regs *regs); +asmlinkage void ret_from_fork_kernel(void *fn_arg, int (*fn)(void *), struct pt_regs *regs); +asmlinkage void ret_from_fork_user(struct pt_regs *regs); asmlinkage void handle_bad_stack(struct pt_regs *regs); asmlinkage void do_page_fault(struct pt_regs *regs); asmlinkage void do_irq(struct pt_regs *regs); |