The implementation of CBT (blk-cbt.c) RCU-protects q->cbt, not cbt->map[ixd].
In v2: - fixed one more place with redundant rcu_dereference Signed-off-by: Maxim Patlasov <[email protected]> --- block/blk-cbt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-cbt.c b/block/blk-cbt.c index 7a4303f..b66f513 100644 --- a/block/blk-cbt.c +++ b/block/blk-cbt.c @@ -96,7 +96,7 @@ static int __blk_cbt_set(struct cbt_info *cbt, blkcnt_t block, unsigned long len = min_t(unsigned long, BITS_PER_PAGE - off, count); - page = rcu_dereference(cbt->map[idx]); + page = cbt->map[idx]; if (page) { spin_lock_page(page); set_bits(page_address(page), off, len, set); @@ -394,7 +394,7 @@ static void cbt_find_next_extent(struct cbt_info *cbt, blkcnt_t block, struct cb idx = block >> (PAGE_SHIFT + 3); while (block < cbt->block_max) { off = block & (BITS_PER_PAGE -1); - page = rcu_dereference(cbt->map[idx]); + page = cbt->map[idx]; if (!page) { if (found) break; _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
