md: make reconfig_mutex optional for writes to md sysfs files.

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Rather than using mddev_lock() to take the reconfig_mutex
when writing to any md sysfs file, we only take mddev_lock()
in the particular _store() functions that require it.
Admittedly this is most, but it isn't all.

This also allows us to remove special-case handling for new_dev_store
(in md_attr_store).

Signed-off-by: NeilBrown <neilb@suse.de>

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This commit is contained in:

NeilBrown 2014-12-15 12:57:01 +11:00

parent 5c47daf6e7

commit 6791875e2e

2 changed files with 316 additions and 164 deletions

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348

drivers/md/md.c

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140

drivers/md/raid5.c

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