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| author |   Peter Zijlstra <peterz@infradead.org> | 2015-05-27 11:09:36 +0930 |
|---|---|---|
| committer |   Rusty Russell <rusty@rustcorp.com.au> | 2015-05-28 11:32:05 +0930 |
| commit | 0a04b0166929405cd833c1cc40f99e862b965ddc (patch) | |
| tree | c108e2aee50ce533cef248c755e86d48c59a4ebf /include/linux/seqlock.h | |
| parent | seqlock: Better document raw_write_seqcount_latch() (diff) | |
| download | linux-dev-0a04b0166929405cd833c1cc40f99e862b965ddc.tar.xz linux-dev-0a04b0166929405cd833c1cc40f99e862b965ddc.zip | |
rcu: Move lockless_dereference() out of rcupdate.h
I want to use lockless_dereference() from seqlock.h, which would mean
including rcupdate.h from it, however rcupdate.h already includes
seqlock.h.
Avoid this by moving lockless_dereference() into compiler.h. This is
somewhat tricky since it uses smp_read_barrier_depends() which isn't
available there, but its a CPP macro so we can get away with it.
The alternative would be moving it into asm/barrier.h, but that would
be updating each arch (I can do if people feel that is more
appropriate).
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/seqlock.h')
0 files changed, 0 insertions, 0 deletions