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author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-11-17 19:13:27 -0500 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-11-24 00:29:58 -0500 |
commit | d4e3b928ab487a8aecd1f6a140b40ac365116cfb (patch) | |
tree | 3beb53d9f7492d60014d84af51ad7e3c56ade753 /fs/bcachefs/btree_update_interior.c | |
parent | 98b1cc82c4affc16f5598d4fa14b1858671b2263 (diff) | |
download | linux-d4e3b928ab487a8aecd1f6a140b40ac365116cfb.tar.gz linux-d4e3b928ab487a8aecd1f6a140b40ac365116cfb.tar.bz2 linux-d4e3b928ab487a8aecd1f6a140b40ac365116cfb.zip |
closures: CLOSURE_CALLBACK() to fix type punning
Control flow integrity is now checking that type signatures match on
indirect function calls. That breaks closures, which embed a work_struct
in a closure in such a way that a closure_fn may also be used as a
workqueue fn by the underlying closure code.
So we have to change closure fns to take a work_struct as their
argument - but that results in a loss of clarity, as closure fns have
different semantics from normal workqueue functions (they run owning a
ref on the closure, which must be released with continue_at() or
closure_return()).
Thus, this patc introduces CLOSURE_CALLBACK() and closure_type() macros
as suggested by Kees, to smooth things over a bit.
Suggested-by: Kees Cook <keescook@chromium.org>
Cc: Coly Li <colyli@suse.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_update_interior.c')
-rw-r--r-- | fs/bcachefs/btree_update_interior.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/bcachefs/btree_update_interior.c b/fs/bcachefs/btree_update_interior.c index 76f27bc9fa24..d08efd6d958e 100644 --- a/fs/bcachefs/btree_update_interior.c +++ b/fs/bcachefs/btree_update_interior.c @@ -778,9 +778,9 @@ static void btree_interior_update_work(struct work_struct *work) } } -static void btree_update_set_nodes_written(struct closure *cl) +static CLOSURE_CALLBACK(btree_update_set_nodes_written) { - struct btree_update *as = container_of(cl, struct btree_update, cl); + closure_type(as, struct btree_update, cl); struct bch_fs *c = as->c; mutex_lock(&c->btree_interior_update_lock); |