On Wed, Jul 8, 2026 at 3:06 AM Thomas Gleixner <[email protected]> wrote: > > syscall_enter_from_user_mode_randomize_stack() replaces > syscall_enter_from_user_mode() and the subsequent invocation of > add_random_kstack_offset(). > > The advantage is that it applies the stack randomization right after > enter_from_user_mode() and thereby avoids the overhead of get/put_cpu_var() > as that code is invoked with interrupts disabled. > > No functional change. > > Signed-off-by: Thomas Gleixner <[email protected]> > Cc: Paul Walmsley <[email protected]> > Cc: Palmer Dabbelt <[email protected]> > Cc: [email protected] > --- > arch/riscv/kernel/traps.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > --- a/arch/riscv/kernel/traps.c > +++ b/arch/riscv/kernel/traps.c > @@ -7,7 +7,6 @@ > #include <linux/kernel.h> > #include <linux/init.h> > #include <linux/irqflags.h> > -#include <linux/randomize_kstack.h> > #include <linux/sched.h> > #include <linux/sched/debug.h> > #include <linux/sched/signal.h> > @@ -333,9 +332,7 @@ void do_trap_ecall_u(struct pt_regs *reg > > riscv_v_vstate_discard(regs); > > - syscall = syscall_enter_from_user_mode(regs, syscall); > - > - add_random_kstack_offset(); > + syscall = syscall_enter_from_user_mode_randomize_stack(regs, > syscall);
Reviewed-by: Guo Ren <[email protected]> -- Best Regards Guo Ren
