The patch titled
cpufreq: initialise default governor before use
has been removed from the -mm tree. Its filename was
cpufreq-initialise-default-governor-before-use.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
Subject: cpufreq: initialise default governor before use
From: Johannes Weiner <[EMAIL PROTECTED]>
When the cpufreq driver starts up at boot time, it calls into the default
governor which might not be initialised yet. This hurts when the
governor's worker function relies on memory that is not yet set up by its
init function.
This migrates all governors from module_init() to fs_initcall() when being
the default, as was already done in cpufreq_performance when it was the
only possible choice.
Fixes at least one actual oops where ondemand is the default governor and
cpufreq_governor_dbs() uses the uninitialised kondemand_wq work-queue
during boot-time.
Signed-off-by: Johannes Weiner <[EMAIL PROTECTED]>
Cc: Dave Jones <[EMAIL PROTECTED]>
Cc: Michael Tokarev <[EMAIL PROTECTED]>
Cc: "Rafael J. Wysocki" <[EMAIL PROTECTED]>
Cc: Venkatesh Pallipadi <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/cpufreq/cpufreq_conservative.c | 4 ++++
drivers/cpufreq/cpufreq_ondemand.c | 5 ++++-
drivers/cpufreq/cpufreq_performance.c | 4 ++++
drivers/cpufreq/cpufreq_userspace.c | 4 ++++
4 files changed, 16 insertions(+), 1 deletion(-)
diff -puN
drivers/cpufreq/cpufreq_conservative.c~cpufreq-initialise-default-governor-before-use
drivers/cpufreq/cpufreq_conservative.c
---
a/drivers/cpufreq/cpufreq_conservative.c~cpufreq-initialise-default-governor-before-use
+++ a/drivers/cpufreq/cpufreq_conservative.c
@@ -603,5 +603,9 @@ MODULE_DESCRIPTION ("'cpufreq_conservati
"optimised for use in a battery environment");
MODULE_LICENSE ("GPL");
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
+fs_initcall(cpufreq_gov_dbs_init);
+#else
module_init(cpufreq_gov_dbs_init);
+#endif
module_exit(cpufreq_gov_dbs_exit);
diff -puN
drivers/cpufreq/cpufreq_ondemand.c~cpufreq-initialise-default-governor-before-use
drivers/cpufreq/cpufreq_ondemand.c
---
a/drivers/cpufreq/cpufreq_ondemand.c~cpufreq-initialise-default-governor-before-use
+++ a/drivers/cpufreq/cpufreq_ondemand.c
@@ -610,6 +610,9 @@ MODULE_DESCRIPTION("'cpufreq_ondemand' -
"Low Latency Frequency Transition capable processors");
MODULE_LICENSE("GPL");
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
+fs_initcall(cpufreq_gov_dbs_init);
+#else
module_init(cpufreq_gov_dbs_init);
+#endif
module_exit(cpufreq_gov_dbs_exit);
-
diff -puN
drivers/cpufreq/cpufreq_performance.c~cpufreq-initialise-default-governor-before-use
drivers/cpufreq/cpufreq_performance.c
---
a/drivers/cpufreq/cpufreq_performance.c~cpufreq-initialise-default-governor-before-use
+++ a/drivers/cpufreq/cpufreq_performance.c
@@ -60,5 +60,9 @@ MODULE_AUTHOR("Dominik Brodowski <linux@
MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
MODULE_LICENSE("GPL");
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
fs_initcall(cpufreq_gov_performance_init);
+#else
+module_init(cpufreq_gov_performance_init);
+#endif
module_exit(cpufreq_gov_performance_exit);
diff -puN
drivers/cpufreq/cpufreq_userspace.c~cpufreq-initialise-default-governor-before-use
drivers/cpufreq/cpufreq_userspace.c
---
a/drivers/cpufreq/cpufreq_userspace.c~cpufreq-initialise-default-governor-before-use
+++ a/drivers/cpufreq/cpufreq_userspace.c
@@ -231,5 +231,9 @@ MODULE_AUTHOR ("Dominik Brodowski <linux
MODULE_DESCRIPTION ("CPUfreq policy governor 'userspace'");
MODULE_LICENSE ("GPL");
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
fs_initcall(cpufreq_gov_userspace_init);
+#else
+module_init(cpufreq_gov_userspace_init);
+#endif
module_exit(cpufreq_gov_userspace_exit);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
cpufreq-initialise-default-governor-before-use.patch
-
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