Merge branch 'akpm-current/current'

[karo-tx-linux.git] / arch / x86 / kernel / smpboot.c

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a2a58e5337fbfbee38900fb0463c69f5f7449f1f..5ed24ea0e9455558931a414a38045cac44edb2ae 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -511,7 +511,7 @@ void __inquire_remote_apic(int apicid)
  */
 #define UDELAY_10MS_DEFAULT 10000
 
-static unsigned int init_udelay = UDELAY_10MS_DEFAULT;
+static unsigned int init_udelay = INT_MAX;
 
 static int __init cpu_init_udelay(char *str)
 {
@@ -524,13 +524,16 @@ early_param("cpu_init_udelay", cpu_init_udelay);
 static void __init smp_quirk_init_udelay(void)
 {
        /* if cmdline changed it from default, leave it alone */
-       if (init_udelay != UDELAY_10MS_DEFAULT)
+       if (init_udelay != INT_MAX)
                return;
 
        /* if modern processor, use no delay */
        if (((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 6)) ||
            ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && (boot_cpu_data.x86 >= 0xF)))
                init_udelay = 0;
+
+       /* else, use legacy delay */
+       init_udelay = UDELAY_10MS_DEFAULT;
 }
 
 /*
@@ -659,7 +662,9 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
                /*
                 * Give the other CPU some time to accept the IPI.
                 */
-               if (init_udelay)
+               if (init_udelay == 0)
+                       udelay(10);
+               else
                        udelay(300);
 
                pr_debug("Startup point 1\n");
@@ -670,7 +675,9 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
                /*
                 * Give the other CPU some time to accept the IPI.
                 */
-               if (init_udelay)
+               if (init_udelay == 0)
+                       udelay(10);
+               else
                        udelay(200);
 
                if (maxlvt > 3)         /* Due to the Pentium erratum 3AP.  */