James Bottomley b3cb867481 [PARISC] fix panic on prefetch(NULL) on PA7300LC ...

Due to an errata, the PA7300LC generates a TLB miss interruption even on the
prefetch instruction.  This means that prefetch(NULL), which is supposed to be
a nop on linux actually generates a NULL deref fault.  Fix this by testing the
address of prefetch against NULL before doing the prefetch.

Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2012-05-16 13:15:21 +01:00

1.1 KiB

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