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Add some basic resume trace facilities

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Considering that there isn't a lot of hw we can depend on during resume,
this is about as good as it gets.

This is x86-only for now, although the basic concept (and most of the
code) will certainly work on almost any platform.

Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Linus Torvalds 2006-06-24 14:27:42 -07:00
commit eb71c87a49
6 changed files with 279 additions and 3 deletions
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9
kernel/power/Kconfig
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@ -36,6 +36,15 @@ config PM_DEBUG
code. This is helpful when debugging and reporting various PM bugs,
like suspend support.
config PM_TRACE
bool "Suspend/resume event tracing"
depends on PM && PM_DEBUG && X86
default y
---help---
This enables some cheesy code to save the last PM event point in the
RTC across reboots, so that you can debug a machine that just hangs
during suspend (or more commonly, during resume).
config SOFTWARE_SUSPEND
bool "Software Suspend"
depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP)