diff mbox series

[1/3] rtnetlink: add guard for RTNL

Message ID 20240325233905.94899774f596.I9da87266ad39fff647828b5822e6ac8898857b71@changeid (mailing list archive)
State RFC
Headers show
Series using guard/__free in networking | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
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: 4342 this patch: 4342
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers fail 7 maintainers not CCed: jiri@resnulli.us jhs@mojatatu.com victor@mojatatu.com kuba@kernel.org pctammela@mojatatu.com martin@strongswan.org horms@kernel.org
netdev/build_clang success Errors and warnings before: 1035 this patch: 1035
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: 4546 this patch: 4546
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 15 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Johannes Berg March 25, 2024, 10:31 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

The new guard/scoped_gard can be useful for the RTNL as well,
so add a guard definition for it. It gets used like

 {
   guard(rtnl)();
   // RTNL held until end of block
 }

or

  scoped_guard(rtnl) {
    // RTNL held in this block
  }

as with any other guard/scoped_guard.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 include/linux/rtnetlink.h | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index cdfc897f1e3c..a7da7dfc06a2 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -7,6 +7,7 @@ 
 #include <linux/netdevice.h>
 #include <linux/wait.h>
 #include <linux/refcount.h>
+#include <linux/cleanup.h>
 #include <uapi/linux/rtnetlink.h>
 
 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
@@ -46,6 +47,8 @@  extern int rtnl_is_locked(void);
 extern int rtnl_lock_killable(void);
 extern bool refcount_dec_and_rtnl_lock(refcount_t *r);
 
+DEFINE_LOCK_GUARD_0(rtnl, rtnl_lock(), rtnl_unlock())
+
 extern wait_queue_head_t netdev_unregistering_wq;
 extern atomic_t dev_unreg_count;
 extern struct rw_semaphore pernet_ops_rwsem;