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Ashok Raj a9d9baa1e8 [PATCH] clean up lock_cpu_hotplug() in cpufreq ... There are some callers in cpufreq hotplug notify path that the lowest function calls lock_cpu_hotplug(). The lock is already held during cpu_up() and cpu_down() calls when the notify calls are broadcast to registered clients. Ideally if possible, we could disable_preempt() at the highest caller and make sure we dont sleep in the path down in cpufreq->driver_target() calls but the calls are so intertwined and cumbersome to cleanup. Hence we consistently use lock_cpu_hotplug() and unlock_cpu_hotplug() in all places. - Removed export of cpucontrol semaphore and made it static. - removed explicit uses of up/down with lock_cpu_hotplug() so we can keep track of the the callers in same thread context and just keep refcounts without calling a down() that causes a deadlock. - Removed current_in_hotplug() uses - Removed PF_HOTPLUG_CPU in sched.h introduced for the current_in_hotplug() temporary workaround. Tested with insmod of cpufreq_stat.ko, and logical online/offline to make sure we dont have any hang situations. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Cc: Zwane Mwaikambo <zwane@linuxpower.ca> Cc: Shaohua Li <shaohua.li@intel.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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Kconfig	…
Makefile	…
cpufreq.c	[PATCH] clean up lock_cpu_hotplug() in cpufreq	19 years ago
cpufreq_conservative.c	[PATCH] cpufreq: SMP fix for conservative governor	19 years ago
cpufreq_ondemand.c	[CPUFREQ] Avoid the ondemand cpufreq governor to use a too high frequency for stats.	20 years ago
cpufreq_performance.c	…
cpufreq_powersave.c	…
cpufreq_stats.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq	19 years ago
cpufreq_userspace.c	…
freq_table.c	…