From: Helge Deller Date: Tue, 16 Jun 2009 20:51:48 +0000 (+0000) Subject: parisc: ensure broadcast tlb purge runs single threaded X-Git-Tag: v2.6.31-rc2~2^2~11 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e82a3b75127188f20c7780bec580e148beb29da7;p=pandora-kernel.git 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 --- Reading git-diff-tree failed