diff options
| -rw-r--r-- | arch/x86/include/asm/mwait.h | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 9 |
2 files changed, 6 insertions, 12 deletions
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h index ce857ef54cf1..54dc313bcdf0 100644 --- a/arch/x86/include/asm/mwait.h +++ b/arch/x86/include/asm/mwait.h @@ -116,13 +116,10 @@ static __always_inline void __sti_mwait(unsigned long eax, unsigned long ecx) static __always_inline void mwait_idle_with_hints(unsigned long eax, unsigned long ecx) { if (static_cpu_has_bug(X86_BUG_MONITOR) || !current_set_polling_and_test()) { - if (static_cpu_has_bug(X86_BUG_CLFLUSH_MONITOR)) { - mb(); - clflush((void *)¤t_thread_info()->flags); - mb(); - } + const void *addr = ¤t_thread_info()->flags; - __monitor((void *)¤t_thread_info()->flags, 0, 0); + alternative_input("", "clflush (%[addr])", X86_BUG_CLFLUSH_MONITOR, [addr] "a" (addr)); + __monitor(addr, 0, 0); if (!need_resched()) { if (ecx & 1) { diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 91f6ff618852..bda47d93c8f9 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -907,13 +907,10 @@ static __init bool prefer_mwait_c1_over_halt(void) static __cpuidle void mwait_idle(void) { if (!current_set_polling_and_test()) { - if (this_cpu_has(X86_BUG_CLFLUSH_MONITOR)) { - mb(); /* quirk */ - clflush((void *)¤t_thread_info()->flags); - mb(); /* quirk */ - } + const void *addr = ¤t_thread_info()->flags; - __monitor((void *)¤t_thread_info()->flags, 0, 0); + alternative_input("", "clflush (%[addr])", X86_BUG_CLFLUSH_MONITOR, [addr] "a" (addr)); + __monitor(addr, 0, 0); if (!need_resched()) { __sti_mwait(0, 0); raw_local_irq_disable(); |