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author | Paul E. McKenney <paulmck@kernel.org> | 2019-09-23 15:05:11 -0700 |
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committer | Paul E. McKenney <paulmck@kernel.org> | 2019-10-30 08:43:08 -0700 |
commit | a63fc6b75cca984c71f095282e0227a390ba88f3 (patch) | |
tree | 3ef7fa0aeeba009a3994f424bb9ba5f7de65045f /samples/kdb | |
parent | 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c (diff) |
rcu: Upgrade rcu_swap_protected() to rcu_replace_pointer()
Although the rcu_swap_protected() macro follows the example of
swap(), the interactions with RCU make its update of its argument
somewhat counter-intuitive. This commit therefore introduces
an rcu_replace_pointer() that returns the old value of the RCU
pointer instead of doing the argument update. Once all the uses of
rcu_swap_protected() are updated to instead use rcu_replace_pointer(),
rcu_swap_protected() will be removed.
Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
[ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Shane M Seymour <shane.seymour@hpe.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'samples/kdb')
0 files changed, 0 insertions, 0 deletions