[Linux-kernel-mentees] [PATCH V2] ext4: use rcu API in debug_print_tree

Theodore Y. Ts'o tytso at mit.edu
Mon Dec 16 02:41:54 UTC 2019


On Fri, Dec 13, 2019 at 10:33:07PM +0700, Phong Tran wrote:
> struct ext4_sb_info.system_blks was marked __rcu.
> But access the pointer without using RCU lock and dereference.
> Sparse warning with __rcu notation:
> 
> block_validity.c:139:29: warning: incorrect type in argument 1 (different address spaces)
> block_validity.c:139:29:    expected struct rb_root const *
> block_validity.c:139:29:    got struct rb_root [noderef] <asn:4> *
> 
> Reviewed-by: Jan Kara <jack at suse.cz>
> Signed-off-by: Phong Tran <tranmanphong at gmail.com>

Applied, thanks.

						- Ted


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