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authorJason Baron <jbaron@redhat.com>2010-10-01 17:23:48 -0400
committerSteven Rostedt <rostedt@goodmis.org>2010-10-28 09:17:40 -0400
commit91bad2f8d3057482b9afb599f14421b007136960 (patch)
treeea5e09e74107593dcfc192c65c1395ed22674df4 /.mailmap
parentb842f8faf6c7dc2005c6a70631c1a91bac02f180 (diff)
jump label: Fix deadlock b/w jump_label_mutex vs. text_mutex
register_kprobe() downs the 'text_mutex' and then calls jump_label_text_reserved(), which downs the 'jump_label_mutex'. However, the jump label code takes those mutexes in the reverse order. Fix by requiring the caller of jump_label_text_reserved() to do the jump label locking via the newly added: jump_label_lock(), jump_label_unlock(). Currently, kprobes is the only user of jump_label_text_reserved(). Reported-by: Ingo Molnar <mingo@elte.hu> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Jason Baron <jbaron@redhat.com> LKML-Reference: <759032c48d5e30c27f0bba003d09bffa8e9f28bb.1285965957.git.jbaron@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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