litmus-rt.git - The LITMUS^RT kernel.

	Commit message (Collapse)	Author	Age
*	parisc: ensure broadcast tlb purge runs single threaded	Helge Deller	2009-07-02
\| \| \| \| \| \| \| \| \| \| \| \|	The TLB flushing functions on hppa, which causes PxTLB broadcasts on the system bus, needs to be protected by irq-safe spinlocks to avoid irq handlers to deadlock the kernel. The deadlocks only happened during I/O intensive loads and triggered pretty seldom, which is why this bug went so long unnoticed. Signed-off-by: Helge Deller <deller@gmx.de> [edited to use spin_lock_irqsave on UP as well since we'd been locking there all this time anyway, --kyle] Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
*	parisc: disable UP-optimized flush_tlb_mm	Kyle McMartin	2008-12-23
\| \| \| \| \| \| \| \| \| \| \| \|	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>
*	parisc: move include/asm-parisc to arch/parisc/include/asm	Kyle McMartin	2008-10-10