Re: [PATCH net-next] net-sysfs: try not to restart the syscall if it will fail eventually

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller [off-list ref]:

On Thu,  7 Oct 2021 16:00:51 +0200 you wrote:

Due to deadlocks in the networking subsystem spotted 12 years ago[1],
a workaround was put in place[2] to avoid taking the rtnl lock when it
was not available and restarting the syscall (back to VFS, letting
userspace spin). The following construction is found a lot in the net
sysfs and sysctl code:

  if (!rtnl_trylock())
          return restart_syscall();

[...]

Here is the summary with links:
  - [net-next] net-sysfs: try not to restart the syscall if it will fail eventually
    https://git.kernel.org/netdev/net-next/c/146e5e733310

You are awesome, thank you!
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