kernel.git/drivers/acpi/processor_throttling.c, branch linux-2.6.33.y

ACPI: Move dereference after NULL test

2009-11-05T22:30:57Z

If the NULL test on pr is needed, then the dereference should be after the NULL test. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // Signed-off-by: Julia Lawall Signed-off-by: Andrew Morton Signed-off-by: Len Brown

cpumask: use zalloc_cpumask_var() where possible

2009-09-24T00:04:24Z

Remove open-coded zalloc_cpumask_var() and zalloc_cpumask_var_node(). Signed-off-by: Li Zefan Signed-off-by: Rusty Russell

Merge branch 'processor-procfs-2.6.32' into release

2009-09-19T06:10:40Z

ACPI: Move definition of PREFIX from acpi_bus.h to internal..h

2009-08-28T23:57:27Z

Linux/ACPI core files using internal.h all PREFIX "ACPI: ", however, not all ACPI drivers use/want it -- and they should not have to #undef PREFIX to define their own. Add GPL commment to internal.h while we are there. This does not change any actual console output, asside from a whitespace fix. Signed-off-by: Len Brown

acpi processor: remove superfluous warning message

2009-08-27T03:06:53Z

This failure is very common on many platforms. Handling it in the ACPI processor driver is enough, and we don't need a warning message unless CONFIG_ACPI_DEBUG is set. Based on a patch from Zhang Rui. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389 Signed-off-by: Frans Pop Acked-by: Zhang Rui Cc: Len Brown Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ACPI processor: force throttling state when BIOS returns incorrect value

2009-08-27T03:06:53Z

If the BIOS reports an invalid throttling state (which seems to be fairly common after system boot), a reset is done to state T0. Because of a check in acpi_processor_get_throttling_ptc(), the reset never actually gets executed, which results in the error reoccurring on every access of for example /proc/acpi/processor/CPU0/throttling. Add a 'force' option to acpi_processor_set_throttling() to ensure the reset really takes effect. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389 This patch, together with the next one, fixes a regression introduced in 2.6.30, listed on the regression list. They have been available for 2.5 months now in bugzilla, but have not been picked up, despite various reminders and without any reason given. Google shows that numerous people are hitting this issue. The issue is in itself relatively minor, but the bug in the code is clear. The patches have been in all my kernels and today testing has shown that throttling works correctly with the patches applied when the system overheats (http://bugzilla.kernel.org/show_bug.cgi?id=13918#c14). Signed-off-by: Frans Pop Acked-by: Zhang Rui Cc: Len Brown Cc: "Rafael J. Wysocki" Cc: Rusty Russell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ACPI: Make ACPI processor proc I/F depend on the ACPI_PROCFS

2009-06-24T05:13:15Z

Now whether the ACPI processor proc I/F is registered depends on the CONFIG_PROC. It had better depend on the CONFIG_ACPI_PROCFS. When the CONFIG_ACPI_PROCFS is unset in kernel configuration, the ACPI processor proc I/F won't be registered. Signed-off-by: Zhao Yakui Signed-off-by: Len Brown

ACPI processor: remove spurious newline from warning message

2009-05-30T01:26:26Z

Commit 4973b22a ("ACPI processor: reset the throttling state once it's invalid") introduced a new warning which prints a spurious newline. The ACPI_WARNING macro that is used already takes care of adding a newline, after adding ACPI_CA_VERSION to the message. Remove the newline to avoid the message getting split into two lines. Signed-off-by: Frans Pop Signed-off-by: Len Brown

ACPI processor: reset the throttling state once it's invalid

2009-05-16T03:21:54Z

If the BIOS hands us an invalid throttling state, write a valid state. http://bugzilla.kernel.org/show_bug.cgi?id=13259 Signed-off-by: Zhang Rui Tested-by: James Ettle Signed-off-by: Len Brown

ACPI processor: introduce module parameter processor.ignore_tpc

2009-05-16T03:21:43Z

Introduce module parameter processor.ignore_tpc. Some laptops are shipped with buggy _TPC, this module parameter is used to to disable the buggy support. http://bugzilla.kernel.org/show_bug.cgi?id=13259 Signed-off-by: Zhang Rui Tested-by: James Ettle Signed-off-by: Len Brown