In a system where no cpu's implement SSBS, for them no need to set pstate. This might help to save few cpu cycles during context switch. Signed-off-by: Gaurav Kohli <gkohli@xxxxxxxxxxxxxx> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 6089638..79f80f1 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -477,6 +477,13 @@ static void ssbs_thread_switch(struct task_struct *next) struct pt_regs *regs = task_pt_regs(next); /* + * For Targets which don't have SSBS support, they + * can return from here. + */ + if (!IS_ENABLED(CONFIG_ARM64_SSBD)) + return; + + /* * Nothing to do for kernel threads, but 'regs' may be junk * (e.g. idle task) so check the flags and bail early. */ -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
