37 files changed, 119 insertions, 125 deletions

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 00c63419c06f..83c579e82a81 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -306,7 +306,7 @@ void die(const char * str, struct pt_regs * regs, long err)
         };
         static int die_counter;
 
-        if (die.lock_owner != _smp_processor_id()) {
+        if (die.lock_owner != raw_smp_processor_id()) {
                 console_verbose();
                 spin_lock_irq(&die.lock);
                 die.lock_owner = smp_processor_id();
diff --git a/arch/i386/lib/delay.c b/arch/i386/lib/delay.c
index 080639f262b1..eb0cdfe9280f 100644
--- a/arch/i386/lib/delay.c
+++ b/arch/i386/lib/delay.c
@@ -34,7 +34,7 @@ inline void __const_udelay(unsigned long xloops)
         xloops *= 4;
         __asm__("mull %0"
                 :"=d" (xloops), "=&a" (d0)
-                :"1" (xloops),"0" (cpu_data[_smp_processor_id()].loops_per_jiffy * (HZ/4)));
+                :"1" (xloops),"0" (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (HZ/4)));
         __delay(++xloops);
 }
 
diff --git a/arch/ppc/lib/locks.c b/arch/ppc/lib/locks.c
index 694163d696d8..c450dc4b766e 100644
--- a/arch/ppc/lib/locks.c
+++ b/arch/ppc/lib/locks.c
@@ -130,7 +130,7 @@ void _raw_read_lock(rwlock_t *rw)
                 while (!read_can_lock(rw)) {
                         if (--stuck == 0) {
                                 printk("_read_lock(%p) CPU#%d lock %d\n",
-                                       rw, _smp_processor_id(), rw->lock);
+                                       rw, raw_smp_processor_id(), rw->lock);
                                 stuck = INIT_STUCK;
                         }
                 }
@@ -158,7 +158,7 @@ void _raw_write_lock(rwlock_t *rw)
                 while (!write_can_lock(rw)) {
                         if (--stuck == 0) {
                                 printk("write_lock(%p) CPU#%d lock %d)\n",
-                                       rw, _smp_processor_id(), rw->lock);
+                                       rw, raw_smp_processor_id(), rw->lock);
                                 stuck = INIT_STUCK;
                         }
                 }
diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c
index f24ce2b87200..ff8a7db142d3 100644
--- a/arch/ppc64/kernel/idle.c
+++ b/arch/ppc64/kernel/idle.c
@@ -292,7 +292,7 @@ static int native_idle(void)
                 if (need_resched())
                         schedule();
 
-                if (cpu_is_offline(_smp_processor_id()) &&
+                if (cpu_is_offline(raw_smp_processor_id()) &&
                     system_state == SYSTEM_RUNNING)
                         cpu_die();
         }
diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c
index 50b36037d86b..351714694d6d 100644
--- a/arch/sh/lib/delay.c
+++ b/arch/sh/lib/delay.c
@@ -24,7 +24,7 @@ inline void __const_udelay(unsigned long xloops)
         __asm__("dmulu.l        %0, %2\n\t"
                 "sts    mach, %0"
                 : "=r" (xloops)
-                : "0" (xloops), "r" (cpu_data[_smp_processor_id()].loops_per_jiffy)
+                : "0" (xloops), "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy)
                 : "macl", "mach");
         __delay(xloops * HZ);
 }
diff --git a/arch/sparc64/lib/delay.c b/arch/sparc64/lib/delay.c
index f6b4c784d53e..e8808727617a 100644
--- a/arch/sparc64/lib/delay.c
+++ b/arch/sparc64/lib/delay.c
@@ -31,7 +31,7 @@ void __const_udelay(unsigned long n)
 {
         n *= 4;
 
-        n *= (cpu_data(_smp_processor_id()).udelay_val * (HZ/4));
+        n *= (cpu_data(raw_smp_processor_id()).udelay_val * (HZ/4));
         n >>= 32;
 
         __delay(n + 1);
diff --git a/arch/x86_64/lib/delay.c b/arch/x86_64/lib/delay.c
index 6e2d66472eb1..aed61a668a1b 100644
--- a/arch/x86_64/lib/delay.c
+++ b/arch/x86_64/lib/delay.c
@@ -34,7 +34,7 @@ void __delay(unsigned long loops)
 
 inline void __const_udelay(unsigned long xloops)
 {
-        __delay(((xloops * cpu_data[_smp_processor_id()].loops_per_jiffy) >> 32) * HZ);
+        __delay(((xloops * cpu_data[raw_smp_processor_id()].loops_per_jiffy) >> 32) * HZ);
 }
 
 void __udelay(unsigned long usecs)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ff64d333e95f..c9d671cf7857 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -171,7 +171,7 @@ static void acpi_processor_idle (void)
         int                     sleep_ticks = 0;
         u32                     t1, t2 = 0;
 
-        pr = processors[_smp_processor_id()];
+        pr = processors[raw_smp_processor_id()];
         if (!pr)
                 return;
 
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index 9b8ff396e6f8..e152d0fa0cdd 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -134,7 +134,7 @@ static int gameport_measure_speed(struct gameport *gameport)
         }
 
         gameport_close(gameport);
-        return (cpu_data[_smp_processor_id()].loops_per_jiffy * (unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx);
+        return (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx);
 
 #else
 
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 55720dc6ec43..745a14183634 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -62,7 +62,7 @@ static int task_exit_notify(struct notifier_block * self, unsigned long val, voi
         /* To avoid latency problems, we only process the current CPU,
          * hoping that most samples for the task are on this CPU
          */
-        sync_buffer(_smp_processor_id());
+        sync_buffer(raw_smp_processor_id());
         return 0;
 }
 
@@ -86,7 +86,7 @@ static int munmap_notify(struct notifier_block * self, unsigned long val, void *
                 /* To avoid latency problems, we only process the current CPU,
                  * hoping that most samples for the task are on this CPU
                  */
-                sync_buffer(_smp_processor_id());
+                sync_buffer(raw_smp_processor_id());
                 return 0;
         }
 
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 71bb41019a12..7d7c8788ea75 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -145,10 +145,10 @@ static inline void set_buffer_unwritten_io(struct buffer_head *bh)
 #define xfs_inherit_nosymlinks  xfs_params.inherit_nosym.val
 #define xfs_rotorstep           xfs_params.rotorstep.val
 
-#ifndef __smp_processor_id
-#define __smp_processor_id()    smp_processor_id()
+#ifndef raw_smp_processor_id
+#define raw_smp_processor_id()  smp_processor_id()
 #endif
-#define current_cpu()           __smp_processor_id()
+#define current_cpu()           raw_smp_processor_id()
 #define current_pid()           (current->pid)
 #define current_fsuid(cred)     (current->fsuid)
 #define current_fsgid(cred)     (current->fsgid)
diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h
index cbc173ae45aa..9950706abdf8 100644
--- a/include/asm-alpha/smp.h
+++ b/include/asm-alpha/smp.h
@@ -43,7 +43,7 @@ extern struct cpuinfo_alpha cpu_data[NR_CPUS];
 #define PROC_CHANGE_PENALTY     20
 
 #define hard_smp_processor_id() __hard_smp_processor_id()
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id()  (current_thread_info()->cpu)
 
 extern cpumask_t cpu_present_mask;
 extern cpumask_t cpu_online_map;
diff --git a/include/asm-arm/smp.h b/include/asm-arm/smp.h
index bd44f894690f..6c6c60adbbaa 100644
--- a/include/asm-arm/smp.h
+++ b/include/asm-arm/smp.h
@@ -21,7 +21,7 @@
 # error "<asm-arm/smp.h> included in non-SMP build"
 #endif
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id() (current_thread_info()->cpu)
 
 extern cpumask_t cpu_present_mask;
 #define cpu_possible_map cpu_present_mask
diff --git a/include/asm-i386/smp.h b/include/asm-i386/smp.h
index e03a206dfa36..55ef31f66bbe 100644
--- a/include/asm-i386/smp.h
+++ b/include/asm-i386/smp.h
@@ -51,7 +51,7 @@ extern u8 x86_cpu_to_apicid[];
  * from the initial startup. We map APIC_BASE very early in page_setup(),
  * so this is correct in the x86 case.
  */
-#define __smp_processor_id() (current_thread_info()->cpu)
+#define raw_smp_processor_id() (current_thread_info()->cpu)
 
 extern cpumask_t cpu_callout_map;
 extern cpumask_t cpu_callin_map;
diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h
index 3ba1a061e4ae..a3914352c995 100644
--- a/include/asm-ia64/smp.h
+++ b/include/asm-ia64/smp.h
@@ -46,7 +46,7 @@ ia64_get_lid (void)
 #define SMP_IRQ_REDIRECTION     (1 << 0)
 #define SMP_IPI_REDIRECTION     (1 << 1)
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id() (current_thread_info()->cpu)
 
 extern struct smp_boot_data {
         int cpu_count;
diff --git a/include/asm-m32r/smp.h b/include/asm-m32r/smp.h
index 8cd4d0da4be1..b9a20cdad65f 100644
--- a/include/asm-m32r/smp.h
+++ b/include/asm-m32r/smp.h
@@ -66,7 +66,7 @@ extern volatile int cpu_2_physid[NR_CPUS];
 #define physid_to_cpu(physid)   physid_2_cpu[physid]
 #define cpu_to_physid(cpu_id)   cpu_2_physid[cpu_id]
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id()  (current_thread_info()->cpu)
 
 extern cpumask_t cpu_callout_map;
 #define cpu_possible_map cpu_callout_map
diff --git a/include/asm-mips/smp.h b/include/asm-mips/smp.h
index 8ba370ecfd4c..5618f1e12f40 100644
--- a/include/asm-mips/smp.h
+++ b/include/asm-mips/smp.h
@@ -21,7 +21,7 @@
 #include <linux/cpumask.h>
 #include <asm/atomic.h>
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id() (current_thread_info()->cpu)
 
 /* Map from cpu id to sequential logical cpu number.  This will only
    not be idempotent when cpus failed to come on-line.  */
diff --git a/include/asm-parisc/smp.h b/include/asm-parisc/smp.h
index fde77ac35463..9413f67a540b 100644
--- a/include/asm-parisc/smp.h
+++ b/include/asm-parisc/smp.h
@@ -51,7 +51,7 @@ extern void smp_send_reschedule(int cpu);
 
 extern unsigned long cpu_present_mask;
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id()  (current_thread_info()->cpu)
 
 #endif /* CONFIG_SMP */
 
diff --git a/include/asm-ppc/smp.h b/include/asm-ppc/smp.h
index ebfb614f55f6..17530c232c76 100644
--- a/include/asm-ppc/smp.h
+++ b/include/asm-ppc/smp.h
@@ -44,7 +44,7 @@ extern void smp_message_recv(int, struct pt_regs *);
 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 #define PROC_CHANGE_PENALTY     20
 
-#define smp_processor_id() (current_thread_info()->cpu)
+#define raw_smp_processor_id()  (current_thread_info()->cpu)
 
 extern int __cpu_up(unsigned int cpu);
 
diff --git a/include/asm-ppc64/smp.h b/include/asm-ppc64/smp.h
index c8646fa999c2..8115ecb8feee 100644
--- a/include/asm-ppc64/smp.h
+++ b/include/asm-ppc64/smp.h
@@ -45,7 +45,7 @@ void generic_cpu_die(unsigned int cpu);
 void generic_mach_cpu_die(void);
 #endif
 
-#define __smp_processor_id() (get_paca()->paca_index)
+#define raw_smp_processor_id()  (get_paca()->paca_index)
 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
 
 extern cpumask_t cpu_sibling_map[NR_CPUS];
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index 9473786387a3..dd50e57a928f 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -47,7 +47,7 @@ extern int smp_call_function_on(void (*func) (void *info), void *info,
  
 #define PROC_CHANGE_PENALTY     20              /* Schedule penalty */
 
-#define smp_processor_id() (S390_lowcore.cpu_data.cpu_nr)
+#define raw_smp_processor_id()  (S390_lowcore.cpu_data.cpu_nr)
 
 extern int smp_get_cpu(cpumask_t cpu_map);
 extern void smp_put_cpu(int cpu);
diff --git a/include/asm-sh/smp.h b/include/asm-sh/smp.h
index 38b54469d7d1..f19a8b3b69a6 100644
--- a/include/asm-sh/smp.h
+++ b/include/asm-sh/smp.h
@@ -25,7 +25,7 @@ extern cpumask_t cpu_possible_map;
 
 #define cpu_online(cpu)         cpu_isset(cpu, cpu_online_map)
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id()  (current_thread_info()->cpu)
 
 /* I've no idea what the real meaning of this is */
 #define PROC_CHANGE_PENALTY     20
diff --git a/include/asm-sparc/smp.h b/include/asm-sparc/smp.h
index f986c0d0922a..4f96d8333a12 100644
--- a/include/asm-sparc/smp.h
+++ b/include/asm-sparc/smp.h
@@ -148,7 +148,7 @@ extern __inline__ int hard_smp_processor_id(void)
 }
 #endif
 
-#define smp_processor_id()      (current_thread_info()->cpu)
+#define raw_smp_processor_id()          (current_thread_info()->cpu)
 
 #define prof_multiplier(__cpu)          cpu_data(__cpu).multiplier
 #define prof_counter(__cpu)             cpu_data(__cpu).counter
diff --git a/include/asm-sparc64/smp.h b/include/asm-sparc64/smp.h
index 5e3e06d908fe..110a2de89123 100644
--- a/include/asm-sparc64/smp.h
+++ b/include/asm-sparc64/smp.h
@@ -64,7 +64,7 @@ static __inline__ int hard_smp_processor_id(void)
         }
 }
 
-#define smp_processor_id() (current_thread_info()->cpu)
+#define raw_smp_processor_id() (current_thread_info()->cpu)
 
 #endif /* !(__ASSEMBLY__) */
 
diff --git a/include/asm-um/smp.h b/include/asm-um/smp.h
index 4412d5d9c26b..d879eba2b52c 100644
--- a/include/asm-um/smp.h
+++ b/include/asm-um/smp.h
@@ -8,7 +8,8 @@
 #include "asm/current.h"
 #include "linux/cpumask.h"
 
-#define smp_processor_id() (current_thread->cpu)
+#define raw_smp_processor_id() (current_thread->cpu)
+
 #define cpu_logical_map(n) (n)
 #define cpu_number_map(n) (n)
 #define PROC_CHANGE_PENALTY     15 /* Pick a number, any number */
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h
index 96844fecbde8..a7425aa5a3b7 100644
--- a/include/asm-x86_64/smp.h
+++ b/include/asm-x86_64/smp.h
@@ -68,7 +68,7 @@ static inline int num_booting_cpus(void)
         return cpus_weight(cpu_callout_map);
 }
 
-#define __smp_processor_id() read_pda(cpunumber)
+#define raw_smp_processor_id() read_pda(cpunumber)
 
 extern __inline int hard_smp_processor_id(void)
 {
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e530c6c092f1..beacd931b606 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -381,7 +381,7 @@ int lowmem_reserve_ratio_sysctl_handler(struct ctl_table *, int, struct file *,
 
 #include <linux/topology.h>
 /* Returns the number of the current Node. */
-#define numa_node_id()          (cpu_to_node(_smp_processor_id()))
+#define numa_node_id()          (cpu_to_node(raw_smp_processor_id()))
 
 #ifndef CONFIG_DISCONTIGMEM
 
diff --git a/include/linux/smp.h b/include/linux/smp.h
index dcf1db3b35d3..9dfa3ee769ae 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -92,10 +92,7 @@ void smp_prepare_boot_cpu(void);
 /*
  *      These macros fold the SMP functionality into a single CPU system
  */
-
-#if !defined(__smp_processor_id) || !defined(CONFIG_PREEMPT)
-# define smp_processor_id()                     0
-#endif
+#define raw_smp_processor_id()                  0
 #define hard_smp_processor_id()                 0
 #define smp_call_function(func,info,retry,wait) ({ 0; })
 #define on_each_cpu(func,info,retry,wait)       ({ func(info); 0; })
@@ -106,30 +103,25 @@ static inline void smp_send_reschedule(int cpu) { }
 #endif /* !SMP */
 
 /*
- * DEBUG_PREEMPT support: check whether smp_processor_id() is being
- * used in a preemption-safe way.
+ * smp_processor_id(): get the current CPU ID.
  *
- * An architecture has to enable this debugging code explicitly.
- * It can do so by renaming the smp_processor_id() macro to
- * __smp_processor_id().  This should only be done after some minimal
- * testing, because usually there are a number of false positives
- * that an architecture will trigger.
+ * if DEBUG_PREEMPT is enabled the we check whether it is
+ * used in a preemption-safe way. (smp_processor_id() is safe
+ * if it's used in a preemption-off critical section, or in
+ * a thread that is bound to the current CPU.)
  *
- * To fix a false positive (i.e. smp_processor_id() use that the
- * debugging code reports but which use for some reason is legal),
- * change the smp_processor_id() reference to _smp_processor_id(),
- * which is the nondebug variant.  NOTE: don't use this to hack around
- * real bugs.
+ * NOTE: raw_smp_processor_id() is for internal use only
+ * (smp_processor_id() is the preferred variant), but in rare
+ * instances it might also be used to turn off false positives
+ * (i.e. smp_processor_id() use that the debugging code reports but
+ * which use for some reason is legal). Don't use this to hack around
+ * the warning message, as your code might not work under PREEMPT.
  */
-#ifdef __smp_processor_id
-# if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
-   extern unsigned int smp_processor_id(void);
-# else
-#  define smp_processor_id() __smp_processor_id()
-# endif
-# define _smp_processor_id() __smp_processor_id()
+#ifdef CONFIG_DEBUG_PREEMPT
+  extern unsigned int debug_smp_processor_id(void);
+# define smp_processor_id() debug_smp_processor_id()
 #else
-# define _smp_processor_id() smp_processor_id()
+# define smp_processor_id() raw_smp_processor_id()
 #endif
 
 #define get_cpu()               ({ preempt_disable(); smp_processor_id(); })
diff --git a/include/net/route.h b/include/net/route.h
index d34ca8fc6756..c3cd069a9aca 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -107,7 +107,7 @@ struct rt_cache_stat
 
 extern struct rt_cache_stat *rt_cache_stat;
 #define RT_CACHE_STAT_INC(field)                                          \
-                (per_cpu_ptr(rt_cache_stat, _smp_processor_id())->field++)
+                (per_cpu_ptr(rt_cache_stat, raw_smp_processor_id())->field++)
 
 extern struct ip_rt_acct *ip_rt_acct;
 
diff --git a/include/net/snmp.h b/include/net/snmp.h
index a15ab256276e..a36bed8ea210 100644
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -128,18 +128,18 @@ struct linux_mib {
 #define SNMP_STAT_USRPTR(name)  (name[1])
 
 #define SNMP_INC_STATS_BH(mib, field)   \
-        (per_cpu_ptr(mib[0], _smp_processor_id())->mibs[field]++)
+        (per_cpu_ptr(mib[0], raw_smp_processor_id())->mibs[field]++)
 #define SNMP_INC_STATS_OFFSET_BH(mib, field, offset)    \
-        (per_cpu_ptr(mib[0], _smp_processor_id())->mibs[field + (offset)]++)
+        (per_cpu_ptr(mib[0], raw_smp_processor_id())->mibs[field + (offset)]++)
 #define SNMP_INC_STATS_USER(mib, field) \
-        (per_cpu_ptr(mib[1], _smp_processor_id())->mibs[field]++)
+        (per_cpu_ptr(mib[1], raw_smp_processor_id())->mibs[field]++)
 #define SNMP_INC_STATS(mib, field)      \
-        (per_cpu_ptr(mib[!in_softirq()], _smp_processor_id())->mibs[field]++)
+        (per_cpu_ptr(mib[!in_softirq()], raw_smp_processor_id())->mibs[field]++)
 #define SNMP_DEC_STATS(mib, field)      \
-        (per_cpu_ptr(mib[!in_softirq()], _smp_processor_id())->mibs[field]--)
+        (per_cpu_ptr(mib[!in_softirq()], raw_smp_processor_id())->mibs[field]--)
 #define SNMP_ADD_STATS_BH(mib, field, addend)   \
-        (per_cpu_ptr(mib[0], _smp_processor_id())->mibs[field] += addend)
+        (per_cpu_ptr(mib[0], raw_smp_processor_id())->mibs[field] += addend)
 #define SNMP_ADD_STATS_USER(mib, field, addend)         \
-        (per_cpu_ptr(mib[1], _smp_processor_id())->mibs[field] += addend)
+        (per_cpu_ptr(mib[1], raw_smp_processor_id())->mibs[field] += addend)
 
 #endif
diff --git a/kernel/module.c b/kernel/module.c
index 83b3d376708c..a566745dde62 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -379,7 +379,7 @@ static void module_unload_init(struct module *mod)
         for (i = 0; i < NR_CPUS; i++)
                 local_set(&mod->ref[i].count, 0);
         /* Hold reference count during initialization. */
-        local_set(&mod->ref[_smp_processor_id()].count, 1);
+        local_set(&mod->ref[raw_smp_processor_id()].count, 1);
         /* Backwards compatibility macros put refcount during init. */
         mod->waiter = current;
 }
diff --git a/kernel/power/smp.c b/kernel/power/smp.c
index cba3584b80fe..457c2302ed42 100644
--- a/kernel/power/smp.c
+++ b/kernel/power/smp.c
@@ -48,11 +48,11 @@ void disable_nonboot_cpus(void)
 {
         oldmask = current->cpus_allowed;
         set_cpus_allowed(current, cpumask_of_cpu(0));
-        printk("Freezing CPUs (at %d)", _smp_processor_id());
+        printk("Freezing CPUs (at %d)", raw_smp_processor_id());
         current->state = TASK_INTERRUPTIBLE;
         schedule_timeout(HZ);
         printk("...");
-        BUG_ON(_smp_processor_id() != 0);
+        BUG_ON(raw_smp_processor_id() != 0);
 
         /* FIXME: for this to work, all the CPUs must be running
          * "idle" thread (or we deadlock). Is that guaranteed? */
diff --git a/kernel/sched.c b/kernel/sched.c
index f12a0c8a7d98..deca041fc364 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3814,7 +3814,7 @@ EXPORT_SYMBOL(yield);
  */
 void __sched io_schedule(void)
 {
-        struct runqueue *rq = &per_cpu(runqueues, _smp_processor_id());
+        struct runqueue *rq = &per_cpu(runqueues, raw_smp_processor_id());
 
         atomic_inc(&rq->nr_iowait);
         schedule();
@@ -3825,7 +3825,7 @@ EXPORT_SYMBOL(io_schedule);
 
 long __sched io_schedule_timeout(long timeout)
 {
-        struct runqueue *rq = &per_cpu(runqueues, _smp_processor_id());
+        struct runqueue *rq = &per_cpu(runqueues, raw_smp_processor_id());
         long ret;
 
         atomic_inc(&rq->nr_iowait);
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 6116b25aa7cf..84a9d18aa8da 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -100,7 +100,7 @@ static int stop_machine(void)
         stopmachine_state = STOPMACHINE_WAIT;
 
         for_each_online_cpu(i) {
-                if (i == _smp_processor_id())
+                if (i == raw_smp_processor_id())
                         continue;
                 ret = kernel_thread(stopmachine, (void *)(long)i,CLONE_KERNEL);
                 if (ret < 0)
@@ -182,7 +182,7 @@ struct task_struct *__stop_machine_run(int (*fn)(void *), void *data,
 
         /* If they don't care which CPU fn runs on, bind to any online one. */
         if (cpu == NR_CPUS)
-                cpu = _smp_processor_id();
+                cpu = raw_smp_processor_id();
 
         p = kthread_create(do_stop, &smdata, "kstopmachine");
         if (!IS_ERR(p)) {
diff --git a/lib/Makefile b/lib/Makefile
index 9eccea9429a7..5f10cb898407 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -20,6 +20,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
 lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
 lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
 obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
+obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
 
 ifneq ($(CONFIG_HAVE_DEC_LOCK),y) 
   lib-y += dec_and_lock.o
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 99b0ae3d51dd..bd2bc5d887b8 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -9,61 +9,6 @@
 #include <linux/module.h>
 #include <linux/kallsyms.h>
 
-#if defined(CONFIG_PREEMPT) && defined(__smp_processor_id) && \
-                defined(CONFIG_DEBUG_PREEMPT)
-
-/*
- * Debugging check.
- */
-unsigned int smp_processor_id(void)
-{
-        unsigned long preempt_count = preempt_count();
-        int this_cpu = __smp_processor_id();
-        cpumask_t this_mask;
-
-        if (likely(preempt_count))
-                goto out;
-
-        if (irqs_disabled())
-                goto out;
-
-        /*
-         * Kernel threads bound to a single CPU can safely use
-         * smp_processor_id():
-         */
-        this_mask = cpumask_of_cpu(this_cpu);
-
-        if (cpus_equal(current->cpus_allowed, this_mask))
-                goto out;
-
-        /*
-         * It is valid to assume CPU-locality during early bootup:
-         */
-        if (system_state != SYSTEM_RUNNING)
-                goto out;
-
-        /*
-         * Avoid recursion:
-         */
-        preempt_disable();
-
-        if (!printk_ratelimit())
-                goto out_enable;
-
-        printk(KERN_ERR "BUG: using smp_processor_id() in preemptible [%08x] code: %s/%d\n", preempt_count(), current->comm, current->pid);
-        print_symbol("caller is %s\n", (long)__builtin_return_address(0));
-        dump_stack();
-
-out_enable:
-        preempt_enable_no_resched();
-out:
-        return this_cpu;
-}
-
-EXPORT_SYMBOL(smp_processor_id);
-
-#endif /* PREEMPT && __smp_processor_id && DEBUG_PREEMPT */
-
 #ifdef CONFIG_PREEMPT_BKL
 /*
  * The 'big kernel semaphore'
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
new file mode 100644
index 000000000000..42c08ef828c5
--- /dev/null
+++ b/lib/smp_processor_id.c
@@ -0,0 +1,55 @@
+/*
+ * lib/smp_processor_id.c
+ *
+ * DEBUG_PREEMPT variant of smp_processor_id().
+ */
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+
+unsigned int debug_smp_processor_id(void)
+{
+        unsigned long preempt_count = preempt_count();
+        int this_cpu = raw_smp_processor_id();
+        cpumask_t this_mask;
+
+        if (likely(preempt_count))
+                goto out;
+
+        if (irqs_disabled())
+                goto out;
+
+        /*
+         * Kernel threads bound to a single CPU can safely use
+         * smp_processor_id():
+         */
+        this_mask = cpumask_of_cpu(this_cpu);
+
+        if (cpus_equal(current->cpus_allowed, this_mask))
+                goto out;
+
+        /*
+         * It is valid to assume CPU-locality during early bootup:
+         */
+        if (system_state != SYSTEM_RUNNING)
+                goto out;
+
+        /*
+         * Avoid recursion:
+         */
+        preempt_disable();
+
+        if (!printk_ratelimit())
+                goto out_enable;
+
+        printk(KERN_ERR "BUG: using smp_processor_id() in preemptible [%08x] code: %s/%d\n", preempt_count(), current->comm, current->pid);
+        print_symbol("caller is %s\n", (long)__builtin_return_address(0));
+        dump_stack();
+
+out_enable:
+        preempt_enable_no_resched();
+out:
+        return this_cpu;
+}
+
+EXPORT_SYMBOL(debug_smp_processor_id);
+