From: Srivatsa S. Bhat Date: Sat, 16 Jun 2012 13:30:45 +0000 (+0200) Subject: ftrace: Disable function tracing during suspend/resume and hibernation, again X-Git-Tag: v3.2.25~43 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=701aa1144e7576cc3a6a9858d2f6ce7ba92bdec4;p=pandora-kernel.git ftrace: Disable function tracing during suspend/resume and hibernation, again commit 443772d408a25af62498793f6f805ce3c559309a upstream. If function tracing is enabled for some of the low-level suspend/resume functions, it leads to triple fault during resume from suspend, ultimately ending up in a reboot instead of a resume (or a total refusal to come out of suspended state, on some machines). This issue was explained in more detail in commit f42ac38c59e0a03d (ftrace: disable tracing for suspend to ram). However, the changes made by that commit got reverted by commit cbe2f5a6e84eebb (tracing: allow tracing of suspend/resume & hibernation code again). So, unfortunately since things are not yet robust enough to allow tracing of low-level suspend/resume functions, suspend/resume is still broken when ftrace is enabled. So fix this by disabling function tracing during suspend/resume & hibernation. Signed-off-by: Srivatsa S. Bhat Signed-off-by: Rafael J. Wysocki Signed-off-by: Ben Hutchings --- Reading git-diff-tree failed