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authorLinus Torvalds <torvalds@g5.osdl.org>2006-02-27 20:41:56 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-27 20:41:56 -0800
commit637029c6cb5efcbaa3d5831af4c1972bdd629779 (patch)
treecd6d32dceef73f0ad467f495f51f331a459d01db
parentd4f0f122ec407bd1b4d1c773d0c87edc6a92cd26 (diff)
downloadblackbird-op-linux-637029c6cb5efcbaa3d5831af4c1972bdd629779.tar.gz
blackbird-op-linux-637029c6cb5efcbaa3d5831af4c1972bdd629779.zip
Revert "[PATCH] x86_64: Only do the clustered systems have unsynchronized TSC assumption on IBM systems"
This reverts commit 13a229abc25640813f1480c0478dfc6bdbc1c19e. Quoth Andi: "After some consideration and feedback from various people it turns out this wasn't that good an idea. It has some problems and needs more work. Since it was only an optimization anyways it's best to just back it out again for now." Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/i386/kernel/acpi/boot.c3
-rw-r--r--arch/x86_64/kernel/apic.c9
-rw-r--r--include/asm-x86_64/acpi.h14
3 files changed, 4 insertions, 22 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 8309a7b2cd63..79577f0ace98 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -44,6 +44,9 @@ extern void __init clustered_apic_check(void);
extern int gsi_irq_sharing(int gsi);
#include <asm/proto.h>
+static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
+
+
#else /* X86 */
#ifdef CONFIG_X86_LOCAL_APIC
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index d70605eda333..e5b14c57eaa0 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -962,14 +962,12 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
irq_exit();
}
-int __initdata unsync_tsc_on_multicluster;
-
/*
* oem_force_hpet_timer -- force HPET mode for some boxes.
*
* Thus far, the major user of this is IBM's Summit2 series:
*
- * Some clustered boxes may have unsynced TSC problems if they are
+ * Clustered boxes may have unsynced TSC problems if they are
* multi-chassis. Use available data to take a good guess.
* If in doubt, go HPET.
*/
@@ -979,11 +977,6 @@ __cpuinit int oem_force_hpet_timer(void)
unsigned id;
DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
- /* Only do this check on IBM machines - big Unisys systems
- use multiple clusters too, but have synchronized TSC */
- if (!unsync_tsc_on_multicluster)
- return 0;
-
bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
for (i = 0; i < NR_CPUS; i++) {
diff --git a/include/asm-x86_64/acpi.h b/include/asm-x86_64/acpi.h
index e2b9923189a0..aa1c7b2e438c 100644
--- a/include/asm-x86_64/acpi.h
+++ b/include/asm-x86_64/acpi.h
@@ -164,20 +164,6 @@ extern u8 x86_acpiid_to_apicid[];
extern int acpi_skip_timer_override;
-extern int unsync_tsc_on_multicluster;
-
-static inline int acpi_madt_oem_check(char *oem, char *productid)
-{
- /* Copied from i386. Probably has too many entries. */
- if (!strncmp(oem, "IBM ENSW", 8) &&
- (!strncmp(productid, "VIGIL SMP", 9)
- || !strncmp(productid, "EXA", 3)
- || !strncmp(productid, "RUTHLESS SMP", 12))) {
- unsync_tsc_on_multicluster = 1;
- }
- return 0;
-}
-
#endif /*__KERNEL__*/
#endif /*_ASM_ACPI_H*/
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