LoongArch: Remove STACK_FRAME_NON_STANDARD(do_syscall)

seehearfeel · chenhuacai · commit 0eb0bd21e838 · 2024-09-17T22:23:10.000+08:00
For now, we can remove STACK_FRAME_NON_STANDARD(do_syscall) because there is no objtool warning "do_syscall+0x11c: return with modified stack frame", then there is handle_syscall() which is the previous frame of do_syscall() in the call trace when executing the command "echo l > /proc/sysrq-trigger". Fixes: a0f7085 ("LoongArch: Add RANDOMIZE_KSTACK_OFFSET support") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
diff --git a/arch/loongarch/kernel/syscall.c b/arch/loongarch/kernel/syscall.c
@@ -79,7 +79,3 @@ void noinstr __no_stack_protector do_syscall(struct pt_regs *regs)
 
 	syscall_exit_to_user_mode(regs);
 }
-
-#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET
-STACK_FRAME_NON_STANDARD(do_syscall);
-#endif

Original file line number	Diff line number	Diff line change
`@@ -79,7 +79,3 @@ void noinstr __no_stack_protector do_syscall(struct pt_regs *regs)`
`79`	`79`
`80`	`80`	`syscall_exit_to_user_mode(regs);`
`81`	`81`	`}`
`82`		`-`
`83`		`-#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET`
`84`		`-STACK_FRAME_NON_STANDARD(do_syscall);`
`85`		`-#endif`