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-rw-r--r--arch/x86/include/asm/mwait.h2
-rw-r--r--arch/x86/lib/delay.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index e28f8b723b5c..9d5252c9685c 100644
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -21,7 +21,7 @@
#define MWAIT_ECX_INTERRUPT_BREAK 0x1
#define MWAITX_ECX_TIMER_ENABLE BIT(1)
#define MWAITX_MAX_LOOPS ((u32)-1)
-#define MWAITX_DISABLE_CSTATES 0xf
+#define MWAITX_DISABLE_CSTATES 0xf0
static inline void __monitor(const void *eax, unsigned long ecx,
unsigned long edx)
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index b7375dc6898f..c126571e5e2e 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -113,8 +113,8 @@ static void delay_mwaitx(unsigned long __loops)
__monitorx(raw_cpu_ptr(&cpu_tss_rw), 0, 0);
/*
- * AMD, like Intel, supports the EAX hint and EAX=0xf
- * means, do not enter any deep C-state and we use it
+ * AMD, like Intel's MWAIT version, supports the EAX hint and
+ * EAX=0xf0 means, do not enter any deep C-state and we use it
* here in delay() to minimize wakeup latency.
*/
__mwaitx(MWAITX_DISABLE_CSTATES, delay, MWAITX_ECX_TIMER_ENABLE);

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