[patch 06/18] riscv/syscall: Use syscall_enter_from_user_mode_randomize_stack()

Philippe Mathieu-Daudé philmd at oss.qualcomm.com
Thu Jul 9 04:16:51 PDT 2026


On 7/7/26 21:06, Thomas Gleixner 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 <tglx at kernel.org>
> Cc: Paul Walmsley <pjw at kernel.org>
> Cc: Palmer Dabbelt <palmer at dabbelt.com>
> Cc: linux-riscv at lists.infradead.org
> ---
>   arch/riscv/kernel/traps.c |    5 +----
>   1 file changed, 1 insertion(+), 4 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd at oss.qualcomm.com>



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