Re: [patch 05/18] powerpc/syscall: Use syscall_enter_from_user_mode_randomize_stack()

Philippe Mathieu-Daudé <[email protected]> Thu, 9 Jul 2026 13:16:21 +0200
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Message-ID <[email protected]> 
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 <[email protected]>
> Cc: Michael Ellerman <[email protected]>
> Cc: Shrikanth Hegde <[email protected]>
> Cc: [email protected]
> ---
>   arch/powerpc/kernel/syscall.c |    4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <[email protected]>