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The FH_FLAG_IMMUTABLE flag was meant to avoid the reference counting on the private hash and so to avoid the performance regression on big machines. With the switch to per-CPU counter this is no longer needed. That flag was never useable on any released kernel. Remove any support for IMMUTABLE while preserve the flags argument and enforce it to be zero. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20250710110011.384614-5-bigeasy@linutronix.de |
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