aboutsummaryrefslogtreecommitdiff
path: root/include/asm-i386
diff options
context:
space:
mode:
authorJeremy Fitzhardinge <jeremy@goop.org>2006-12-07 02:14:03 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:03 +0100
commitb2938f880890ebfcccad356275e0000193153623 (patch)
treef2dcde93e6bd449369e4d305f081e9c12af99948 /include/asm-i386
parent49d26b6eaa8e970c8cf6e299e6ccba2474191bf5 (diff)
[PATCH] i386: Implement smp_processor_id() with the PDA
Use the cpu_number in the PDA to implement raw_smp_processor_id. This is a little simpler than using thread_info, though the cpu field in thread_info cannot be removed since it is used for things other than getting the current CPU in common code. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Chuck Ebbert <76306.1226@compuserve.com> Cc: Zachary Amsden <zach@vmware.com> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/pda.h2
-rw-r--r--include/asm-i386/smp.h3
2 files changed, 4 insertions, 1 deletions
diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h
index 4c39ccb1305..f90fde22566 100644
--- a/include/asm-i386/pda.h
+++ b/include/asm-i386/pda.h
@@ -11,6 +11,8 @@
struct i386_pda
{
struct i386_pda *_pda; /* pointer to self */
+
+ int cpu_number;
};
extern struct i386_pda *_cpu_pda[];
diff --git a/include/asm-i386/smp.h b/include/asm-i386/smp.h
index bd59c1508e7..64fe624c02c 100644
--- a/include/asm-i386/smp.h
+++ b/include/asm-i386/smp.h
@@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/threads.h>
#include <linux/cpumask.h>
+#include <asm/pda.h>
#endif
#ifdef CONFIG_X86_LOCAL_APIC
@@ -56,7 +57,7 @@ extern void cpu_uninit(void);
* from the initial startup. We map APIC_BASE very early in page_setup(),
* so this is correct in the x86 case.
*/
-#define raw_smp_processor_id() (current_thread_info()->cpu)
+#define raw_smp_processor_id() (read_pda(cpu_number))
extern cpumask_t cpu_callout_map;
extern cpumask_t cpu_callin_map;