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| author | Seth Jennings <sjenning@linux.vnet.ibm.com> | 2013-08-21 01:05:05 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-21 22:52:20 +0400 |
| commit | fa2be40fe7c0aa3b7accbf6dfa9ef0976e191d4c (patch) | |
| tree | a51ae32d86315a68029a65fe028a2ade240050df /include/linux/memory.h | |
| parent | cb5e39b8038be913030a7b01d4396cfa5f9ded7b (diff) | |
| download | linux-fa2be40fe7c0aa3b7accbf6dfa9ef0976e191d4c.tar.xz | |
drivers: base: use standard device online/offline for state change
There are two ways to set the online/offline state for a memory block:
echo 0|1 > online and echo online|online_kernel|online_movable|offline >
state.
The state attribute can online a memory block with extra data, the
"online type", where the online attribute uses a default online type of
ONLINE_KEEP, same as echo online > state.
Currently there is a state_mutex that provides consistency between the
memory block state and the underlying memory.
The problem is that this code does a lot of things that the common
device layer can do for us, such as the serialization of the
online/offline handlers using the device lock, setting the dev->offline
field, and calling kobject_uevent().
This patch refactors the online/offline code to allow the common
device_[online|offline] functions to be used. The result is a simpler
and more common code path for the two state setting mechanisms. It also
removes the state_mutex from the struct memory_block as the memory block
device lock provides the state consistency.
No functional change is intended by this patch.
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/memory.h')
| -rw-r--r-- | include/linux/memory.h | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/include/linux/memory.h b/include/linux/memory.h index 4c89fb0c8f4c..9a6bbf76452d 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -25,16 +25,9 @@ struct memory_block { unsigned long start_section_nr; unsigned long end_section_nr; - unsigned long state; - int section_count; - - /* - * This serializes all state change requests. It isn't - * held during creation because the control files are - * created long after the critical areas during - * initialization. - */ - struct mutex state_mutex; + unsigned long state; /* serialized by the dev->lock */ + int section_count; /* serialized by mem_sysfs_mutex */ + int online_type; /* for passing data to online routine */ int phys_device; /* to which fru does this belong? */ void *hw; /* optional pointer to fw/hw data */ int (*phys_callback)(struct memory_block *); |