diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r-- | arch/x86/kernel/smpboot.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 362dd8953f48..5fe11d5d29c1 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -210,17 +210,11 @@ static void notrace start_secondary(void *unused) * before cpu_init(), SMP booting is too fragile that we want to * limit the things done here to the most necessary things. */ - if (boot_cpu_has(X86_FEATURE_PCID)) - __write_cr4(__read_cr4() | X86_CR4_PCIDE); + cr4_init(); #ifdef CONFIG_X86_32 /* switch away from the initial page table */ load_cr3(swapper_pg_dir); - /* - * Initialize the CR4 shadow before doing anything that could - * try to read it. - */ - cr4_init_shadow(); __flush_tlb_all(); #endif load_current_idt(); @@ -263,6 +257,14 @@ static void notrace start_secondary(void *unused) wmb(); cpu_startup_entry(CPUHP_AP_ONLINE_IDLE); + + /* + * Prevent tail call to cpu_startup_entry() because the stack protector + * guard has been changed a couple of function calls up, in + * boot_init_stack_canary() and must not be checked before tail calling + * another function. + */ + prevent_tail_call_optimization(); } /** |