From 3b2b9c0198bbcf077f201cd693a0efc597d05405 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 7 Jul 2026 21:06:15 +0200 Subject: [PATCH] powerpc/syscall: Use syscall_enter_from_user_mode_randomize_stack() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Tested-by: Mukesh Kumar Chaurasiya (IBM) Reviewed-by: Radu Rendec Reviewed-by: Jinjie Ruan Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Mukesh Kumar Chaurasiya (IBM) Link: https://patch.msgid.link/20260707190253.918861529@kernel.org --- arch/powerpc/kernel/syscall.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c index ee07b2ed5029..b4d0159e29f8 100644 --- a/arch/powerpc/kernel/syscall.c +++ b/arch/powerpc/kernel/syscall.c @@ -2,7 +2,6 @@ #include #include -#include #include #include @@ -19,8 +18,7 @@ notrace long system_call_exception(struct pt_regs *regs, unsigned long r0) long ret; syscall_fn f; - r0 = syscall_enter_from_user_mode(regs, r0); - add_random_kstack_offset(); + r0 = syscall_enter_from_user_mode_randomize_stack(regs, r0); if (unlikely(r0 >= NR_syscalls)) { if (unlikely(trap_is_unsupported_scv(regs))) {