From: Paul E. McKenney Date: Wed, 3 Aug 2011 10:34:24 +0000 (-0700) Subject: rcu: Dump local stack if cannot dump all CPUs' stacks X-Git-Tag: v3.2-rc1~165^2^2~11 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4627e240dfee4a0a46a58010b1b721b4ded1918f;p=pandora-kernel.git rcu: Dump local stack if cannot dump all CPUs' stacks The trigger_all_cpu_backtrace() function is a no-op in architectures that do not define arch_trigger_all_cpu_backtrace. On such architectures, RCU CPU stall warning messages contain no stack trace information, which makes debugging quite difficult. This commit therefore substitutes dump_stack() for architectures that do not define arch_trigger_all_cpu_backtrace, so that at least the local CPU's stack is dumped as part of the RCU CPU stall warning message. Signed-off-by: Paul E. McKenney --- Reading git-diff-tree failed