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Srivatsa S. Bhat 31b1c08507 ftrace: Disable function tracing during suspend/resume and hibernation, again

commit 443772d408 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 f42ac38c59 (ftrace:
disable tracing for suspend to ram). However, the changes made by that commit
got reverted by commit cbe2f5a6e8 (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 <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2012-08-09 08:27:35 -07:00

block_io.c

block: kill off REQ_UNPLUG

2011-03-10 08:52:27 +01:00

console.c

vt: introduce and use vt_kmsg_redirect() function

2009-12-15 08:53:28 -08:00

hibernate.c

ftrace: Disable function tracing during suspend/resume and hibernation, again

2012-08-09 08:27:35 -07:00

Kconfig

PM: Remove CONFIG_PM_VERBOSE