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rbtree_latch: Use seqcount_latch_t 

Latch sequence counters have unique read and write APIs, and thus
seqcount_latch_t was recently introduced at seqlock.h.

Use that new data type instead of plain seqcount_t. This adds the
necessary type-safety and ensures that only latching-safe seqcount APIs
are to be used.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200827114044.11173-8-a.darwish@linutronix.de
zero-sugar-mainline-defconfig
Ahmed S. Darwish 2020-08-27 13:40:43 +02:00 committed by Peter Zijlstra
parent a1f1066133
commit 24bf401ceb
1 changed files with 3 additions and 3 deletions
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6
include/linux/rbtree_latch.h
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@ -42,8 +42,8 @@ struct latch_tree_node {
};
struct latch_tree_root {
seqcount_t seq;
struct rb_root tree[2];
seqcount_latch_t seq;
struct rb_root tree[2];
};
/**
@ -206,7 +206,7 @@ latch_tree_find(void *key, struct latch_tree_root *root,
do {
seq = raw_read_seqcount_latch(&root->seq);
node = __lt_find(key, root, seq & 1, ops->comp);
} while (read_seqcount_retry(&root->seq, seq));
} while (read_seqcount_latch_retry(&root->seq, seq));
return node;
}