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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2007-02-05 16:12:44 -0800 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2007-02-10 20:01:47 -0500 |
| commit | 5a01f2e8f3ac134e24144d74bb48a60236f7024d (patch) | |
| tree | 8d807b81618dc1b4782e0e58a9629a6d0a09fbe3 /fs/char_dev.c | |
| parent | c120069779e3e35917c15393cf2847fa79811eb6 (diff) | |
| download | op-kernel-dev-5a01f2e8f3ac134e24144d74bb48a60236f7024d.zip op-kernel-dev-5a01f2e8f3ac134e24144d74bb48a60236f7024d.tar.gz | |
[CPUFREQ] Rewrite lock in cpufreq to eliminate cpufreq/hotplug related issues
Yet another attempt to resolve cpufreq and hotplug locking issues.
Patchset has 3 patches:
* Rewrite the lock infrastructure of cpufreq using a per cpu rwsem.
* Minor restructuring of work callback in ondemand driver.
* Use the new cpufreq rwsem infrastructure in ondemand work.
This patch:
Convert policy->lock to rwsem and move it to per_cpu area.
This rwsem will protect against both changing/accessing policy
related parameters and CPU hot plug/unplug.
[malattia@linux.it: fix oops in kref_put()]
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'fs/char_dev.c')
0 files changed, 0 insertions, 0 deletions
