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Subjectlib: reorder prop_local_percpu to remove 64 bit alignment padding
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Date
Reorder prop_local_percpu to remove 8 bytes of alignment padding in 64
bit builds, and therefore shrink backing_dev_info & request_queue by 8
bytes.


Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>

---
patch against v3.0-rc6
compiled & tested on x86_64

I'm not entirely sure which tree this should go through but as it
indirectly removes padding from request_queue I guessed Jens tree?

get_maintainers doesn't know either, it thinks I should send it to
myself :)


regards
Richard

diff --git a/include/linux/proportions.h b/include/linux/proportions.h
index cf793bb..9168cb0 100644
--- a/include/linux/proportions.h
+++ b/include/linux/proportions.h
@@ -56,8 +56,8 @@ struct prop_local_percpu {
/*
* snapshot of the last seen global state
*/
- int shift;
unsigned long period;
+ int shift;
spinlock_t lock; /* protect the snapshot state */
};




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