From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 22 Apr 2026 22:09:01 +0000 (-0700)
Subject: Merge tag 'tracefs-v7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace... 
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2e68039281932e6dc37718a1ea7cbb8e2cda42e6;p=thirdparty%2Fkernel%2Fstable.git

Merge tag 'tracefs-v7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracefs fixes from Steven Rostedt:

 - Use list_add_tail_rcu() for walking eventfs children

   The linked list of children is protected by SRCU and list walkers can
   walk the list with only using SRCU. Using just list_add_tail() on
   weakly ordered architectures can cause issues. Instead use
   list_add_tail_rcu().

 - Hold eventfs_mutex and SRCU for remount walk events

   The trace_apply_options() walks the tracefs_inodes where some are
   eventfs inodes and eventfs_remount() is called which in turn calls
   eventfs_set_attr(). This walk only holds normal RCU read locks, but
   the eventfs_mutex and SRCU should be held.

   Add a eventfs_remount_(un)lock() helpers to take the necessary locks
   before iterating the list.

* tag 'tracefs-v7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  eventfs: Hold eventfs_mutex and SRCU when remount walks events
  eventfs: Use list_add_tail_rcu() for SRCU-protected children list
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2e68039281932e6dc37718a1ea7cbb8e2cda42e6