diff options
Diffstat (limited to 'arch/x86/entry/common.c')
| -rw-r--r-- | arch/x86/entry/common.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 03aacd188458..d5eee851071c 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -324,9 +324,11 @@ __visible void syscall_return_slowpath(struct pt_regs *regs) #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION) /* * Does a 32-bit syscall. Called with IRQs on and does all entry and - * exit work and returns with IRQs off. + * exit work and returns with IRQs off. This function is extremely hot + * in workloads that use it, and it's usually called from + * do_fast_syscall_32, so forcibly inline it to improve performance. */ -static void do_syscall_32_irqs_on(struct pt_regs *regs) +static __always_inline void do_syscall_32_irqs_on(struct pt_regs *regs) { struct thread_info *ti = pt_regs_to_thread_info(regs); unsigned int nr = (unsigned int)regs->orig_ax; @@ -345,7 +347,7 @@ static void do_syscall_32_irqs_on(struct pt_regs *regs) nr = syscall_trace_enter(regs); } - if (nr < IA32_NR_syscalls) { + if (likely(nr < IA32_NR_syscalls)) { /* * It's possible that a 32-bit syscall implementation * takes a 64-bit parameter but nonetheless assumes that |