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eventfs: Make sure that parent->d_inode is locked in creating files/dirs

DragoPayras2requested to merge
DragoPayras228/linux:sm8250/v6.7 into sm8250/v6.2

Since the locking of the parent->d_inode has been moved outside the creation of the files and directories (as it use to be locked via a conditional), add a WARN_ON_ONCE() to the case that it's not locked.

Link: https://lkml.kernel.org/r/20231121231112.853962542@goodmis.org

Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Mark Rutland mark.rutland@arm.com Cc: Andrew Morton akpm@linux-foundation.org Reviewed-by: Josef Bacik josef@toxicpanda.com Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org

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