IB/uverbs: Convert *cdev to cdev in struct ib_uverbs_device

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Instead of storing a pointer to a cdev, embed the entire struct cdev.

This change allows us to use the container_of() macro in
ib_uverbs_open() in a future patch.

This change increases the size of struct ib_uverbs_device to 168 bytes
across 3 cachelines from 80 bytes in 2 cachelines.  However, we
rearrange the members so that everything fits into the first cacheline
except for the struct cdev. Finally, we don't touch the cdev in any
fastpaths, so this change shouldn't negatively affect performance.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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This commit is contained in:

Alexander Chiang 2010-02-02 19:07:49 +00:00 • committed by Roland Dreier

parent 676ad58553

commit 055422ddbb

2 changed files with 14 additions and 16 deletions

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7

drivers/infiniband/core/uverbs.h

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23

drivers/infiniband/core/uverbs_main.c

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