From b3cb8674811d1851bbf1486a73d62b90c119b994 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 16 May 2012 11:10:27 +0100 Subject: [PATCH] [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 --- Reading git-format-patch failed