From: Helge Deller Date: Wed, 29 Jul 2009 21:17:20 +0000 (+0200) Subject: parisc: ensure broadcast tlb purge runs single threaded X-Git-Tag: v2.6.27.30~17 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2614443191474e4c8619bf59665f9ef820e5276c;p=pandora-kernel.git parisc: ensure broadcast tlb purge runs single threaded commit e82a3b75127188f20c7780bec580e148beb29da7 upstream parisc: ensure broadcast tlb purge runs single threaded 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 [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 Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed