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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-01-30 13:30:04 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:04 +0100 |
| commit | 5c9c9bec0589be696c70c5efb448b17d5ab720e2 (patch) | |
| tree | b4fe757645a01c76ed297792f03a4ba10743bd55 /include/asm-x86/suspend_64.h | |
| parent | 9484b1eb4d05957d3114dc63026448eb66106c06 (diff) | |
| download | linux-5c9c9bec0589be696c70c5efb448b17d5ab720e2.tar.gz linux-5c9c9bec0589be696c70c5efb448b17d5ab720e2.tar.bz2 linux-5c9c9bec0589be696c70c5efb448b17d5ab720e2.zip | |
x86: hibernation: document __save_processor_state() on x86
Document the fact that __save_processor_state() has to save all CPU
registers referred to by the kernel in case a different kernel is
used to load and restore a hibernation image containing it.
Sigend-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/suspend_64.h')
| -rw-r--r-- | include/asm-x86/suspend_64.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/asm-x86/suspend_64.h b/include/asm-x86/suspend_64.h index c505a76bcf6e..4404668f9aa4 100644 --- a/include/asm-x86/suspend_64.h +++ b/include/asm-x86/suspend_64.h @@ -15,7 +15,14 @@ arch_prepare_suspend(void) return 0; } -/* Image of the saved processor state. If you touch this, fix acpi/wakeup.S. */ +/* + * Image of the saved processor state, used by the low level ACPI suspend to + * RAM code and by the low level hibernation code. + * + * If you modify it, fix arch/x86/kernel/acpi/wakeup_64.S and make sure that + * __save/__restore_processor_state(), defined in arch/x86/kernel/suspend_64.c, + * still work as required. + */ struct saved_context { struct pt_regs regs; u16 ds, es, fs, gs, ss; |