diff mbox series

[bpf-next,2/4] rculist: add hlist_for_each_rcu

Message ID 20230511172054.1892665-3-sdf@google.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: query effective progs without cgroup_mutex | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 16250 this patch: 16250
netdev/cc_maintainers fail 11 maintainers not CCed: rcu@vger.kernel.org boqun.feng@gmail.com josh@joshtriplett.org joel@joelfernandes.org frederic@kernel.org paulmck@kernel.org quic_neeraju@quicinc.com qiang1.zhang@intel.com rostedt@goodmis.org jiangshanlai@gmail.com mathieu.desnoyers@efficios.com
netdev/build_clang success Errors and warnings before: 4836 this patch: 4836
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 17150 this patch: 17150
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 12 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
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bpf/vmtest-bpf-next-VM_Test-33 fail Logs for test_verifier on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-15 success Logs for test_progs on s390x with gcc
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bpf/vmtest-bpf-next-PR success PR summary

Commit Message

Stanislav Fomichev May 11, 2023, 5:20 p.m. UTC 
Same as __hlist_for_each_rcu but uses rcu_dereference_raw
to suppress the warning from the update path (which is enforced
by extra cond expression).

Signed-off-by: Stanislav Fomichev <sdf@google.com>
---
 include/linux/rculist.h | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index d29740be4833..7b0a73139b21 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -690,6 +690,12 @@  static inline void hlist_add_behind_rcu(struct hlist_node *n,
 	     pos;						\
 	     pos = rcu_dereference(hlist_next_rcu(pos)))
 
+#define hlist_for_each_rcu(pos, head, cond...)			\
+	for (__list_check_rcu(dummy, ## cond, 0),		\
+	     pos = rcu_dereference_raw(hlist_first_rcu(head));	\
+	     pos;						\
+	     pos = rcu_dereference_raw(hlist_next_rcu(pos)))
+
 /**
  * hlist_for_each_entry_rcu - iterate over rcu list of given type
  * @pos:	the type * to use as a loop cursor.