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parisc: disable UP-optimized flush_tlb_mm
authorKyle McMartin <kyle@infradead.org>
Tue, 23 Dec 2008 13:44:30 +0000 (08:44 -0500)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 24 Dec 2008 01:03:21 +0000 (17:03 -0800)
flush_tlb_mm's "optimized" uniprocessor case of allocating a new
context for userspace is exposing a race where we can suddely return
to a syscall with the protection id and space id out of sync, trapping
on the next userspace access.

Debugged-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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