2 files changed, 3 insertions, 3 deletions

diff --git a/arch/x86_64/lib/delay.c b/arch/x86_64/lib/delay.c
index 50be90975d04..2dbebd308347 100644
--- a/arch/x86_64/lib/delay.c
+++ b/arch/x86_64/lib/delay.c
@@ -40,13 +40,13 @@ EXPORT_SYMBOL(__delay);
 
 inline void __const_udelay(unsigned long xloops)
 {
-        __delay((xloops * HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy) >> 32);
+        __delay(((xloops * HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy) >> 32) + 1);
 }
 EXPORT_SYMBOL(__const_udelay);
 
 void __udelay(unsigned long usecs)
 {
-        __const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */
+        __const_udelay(usecs * 0x000010c7);  /* 2**32 / 1000000 (rounded up) */
 }
 EXPORT_SYMBOL(__udelay);
 
diff --git a/include/asm-x86_64/delay.h b/include/asm-x86_64/delay.h
index 65f64acc5319..40146f611ccb 100644
--- a/include/asm-x86_64/delay.h
+++ b/include/asm-x86_64/delay.h
@@ -16,7 +16,7 @@ extern void __const_udelay(unsigned long usecs);
 extern void __delay(unsigned long loops);
 
 #define udelay(n) (__builtin_constant_p(n) ? \
-        ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c6ul)) : \
+        ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
         __udelay(n))
 
 #define ndelay(n) (__builtin_constant_p(n) ? \