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f8d269390c
Unfortunately the current use of a mutex for this lock leads to priority inversion. Traces have been observed where a process is trying to obtain this mutex for 22ms, but it's unable to do so because the thread holding the lock is scheduled out. Since this occurred on a UI thread, that is an extremely long delay. Code paths that might sleep under this lock have already been updated in patches leading up to this one. Reviewed-by: Matthew Maurer <mmaurer@google.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://patch.msgid.link/20260615-binder-noderefs-spin-v3-6-3235f5a3e0a0@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>