rhashtable: allow rht_bucket_var to return NULL.

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Rather than returning a pointer to a static nulls, rht_bucket_var()
now returns NULL if the bucket doesn't exist.
This will make the next patch, which stores a bitlock in the
bucket pointer, somewhat cleaner.

This change involves introducing __rht_bucket_nested() which is
like rht_bucket_nested(), but doesn't provide the static nulls,
and changing rht_bucket_nested() to call this and possible
provide a static nulls - as is still needed for the non-var case.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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NeilBrown 2019-04-02 10:07:45 +11:00 • committed by David S. Miller

parent 7a41c294c1

commit ff302db965

2 changed files with 29 additions and 11 deletions

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lib/rhashtable.c

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