[POWERPC] Celleb: improve MMU hashtable locking
Disabling IRQ is required only in invalidation. This changes "spin_lock_irqsave" to "spin_lock" in other ops. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Akira Iguchi <akira2.iguchi@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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