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Upgrade kernel to 2.6.9-rc3 and kdb to 4.4
Merge of 2.6.x-xfs-melb:linux:19628a by kenmcd.

menu "Kernel hacking"

source "lib/Kconfig.debug"

config DEBUG_RWLOCK
        bool "Read-write spinlock debugging"
        depends on DEBUG_KERNEL && SMP
        help
          If you say Y here then read-write lock processing will count how many
          times it has tried to get the lock and issue an error message after
          too many attempts.  If you suspect a rwlock problem or a kernel
          hacker asks for this option then say Y.  Otherwise say N.

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