Talk:Tpctl

2007-04-11T12:41:11Z

OfkBhk:

== "thinkpad" module kernel compatibility ==

Ajunge, how do you compile the "thinkpad" module compile on kernel >=2.6.9? The latest thinkpad version (5.8) still uses "get_cpu_ptr" and "set_cpu_ptr", which were removed in 2.6.9.

--[[User:Thinker|Thinker]] 13:53, 10 Dec 2005 (CET)
----

The Debian thinkpad-source package in unstable (version 5.8-4) works just fine; I'm compiling it with 2.6.14 without any problems. And get_cpu_ptr is present; it's defined in include/linux/percpu.h.

--[[User:TedTso|TedTso]] 18:56, 17 Dec 2005 (EDT)
----

Stock thinkpad_5.8.tar.gz doesn't #include percpu.h anyway, and doesn't compile on vanilla 2.6.14.3 or 2.6.15-rc5. Maybe Debian patched it? In that case the article page should ref the patch.

--[[User:Thinker|Thinker]] 11:50, 18 Dec 2005 (CET)
----

Oops, my mistake. I forgot that I had patched my copy of thinkpadpm.c. I replaced the use of get_cpu_ptr and set_cpu_ptr with get_cpu_val() and set_cpu_val(). I just double checked, and it tpctl is working for me on 2.6.15-rc5.

--[[User:TedTso|TedTso]] 14:45, 19 Dec 2005 (EDT)
----

Care to send a patch? It would be useful on the article page, and maybe we can get it into upstream.

--[[User:Thinker|Thinker]] 23:11, 19 Dec 2005 (CET)
----

This is the patch I'd been using up to 2.6.15:

[root@ccb-thinkpad thinkpad-5.8]# more thinkpad-2.6-per_cpu.patch
--- 2.6/drivers/thinkpadpm.c.ccb 2005-07-02 01:02:47.000000000 -0400
2.6/drivers/thinkpadpm.c 2005-07-02 01:13:20.000000000 -0400
@@ -171,8 171,8 @@
#define get_gdt_table() (cpu_gdt_table[get_cpu()])
#define put_gdt_table() put_cpu()
#else
-#define get_gdt_table() (get_cpu_ptr(cpu_gdt_table))
-#define put_gdt_table() put_cpu_ptr(cpu_gdt_table)
#define get_gdt_table() per_cpu(cpu_gdt_table, smp_processor_id())
#define put_gdt_table() put_cpu()
#endif

Sounds like TedTso took a slightly different approach.

As it stands, it won't compile since the release of 2.6.15 because the
once global pm_active variable in the kernel is no longer visible.

ccb

---
Sorry for the ugliness of that patch. Do a wiki edit on the page
and you'll see it on all of it's Courier10 glory.

For 2.6.15: some of the definitions have been split off into a
new header file. You'll have to edit thinkpadpm.c and add
"#include <linux/pm_legacy.h>" right after the include for pm.h
to get it to compile.

ccb
----
Ugliness fixed. [[User:Wyrfel|Wyrfel]] 00:24, 13 February 2006 (CET)
----

As of 2.6.16 they've reworked some of the macros again. This patch
applied against virgin thinkpad-5.8 sources appears to work:

<pre>
--- ./2.6/drivers/thinkpadpm.c.ccb 2005-09-05 20:53:39.000000000 -0400
./2.6/drivers/thinkpadpm.c 2006-05-05 10:14:26.000000000 -0400
@@ -38,6 38,7 @@
#include <asm/uaccess.h>
#include <linux/apm_bios.h>
#include <linux/pm.h>
#include <linux/pm_legacy.h>
#include <linux/version.h>
#include "thinkpad_common.h"
#include "thinkpadpm.h"
@@ -171,8 172,8 @@
#define get_gdt_table() (cpu_gdt_table[get_cpu()])
#define put_gdt_table() put_cpu()
#else
-#define get_gdt_table() (get_cpu_ptr(cpu_gdt_table))
-#define put_gdt_table() put_cpu_ptr(cpu_gdt_table)
#define get_gdt_table() get_cpu_gdt_table(smp_processor_id())
#define put_gdt_table() put_cpu()
#endif

/**
@@ -472,7 473,7 @@
{

/*** Set up APM BIOS interface ***/
- if ( !pm_active ) {
if ( !pm_active ) {
printk(KERN_INFO "thinkpadpm: Power management not active. :-(\n");
return -ENODEV;
}

</pre>

ccb
----
Seems not to work since 2.6.17 (with thinkpad_6.0) because of the use of old MODULE_PARM macro and inter_module_* function.

A patch is submitted [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=366170 here]
But due to my lack of experience, I have not tested it. If someone could confirm it works -or not...-

Mat

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