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kexec jump: fix for ftrace

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Ftrace depends on some processor state that we destroyed during kexec and
restored by restore_processor_state().  So save_processor_state() and
restore_processor_state() are moved into machine_kexec() and ftrace is
restored after restore_processor_state().

Signed-off-by: Huang Ying <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Steven Rostedt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Huang Ying 2008-08-15 00:40:26 -07:00 • committed by Linus Torvalds
commit 3122c33119
2 changed files with 15 additions and 3 deletions
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2
kernel/kexec.c
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@ -1469,7 +1469,6 @@ int kernel_kexec(void)
error = device_power_down(PMSG_FREEZE);
if (error)
goto Enable_irqs;
save_processor_state();
} else
#endif
{
@ -1482,7 +1481,6 @@ int kernel_kexec(void)
#ifdef CONFIG_KEXEC_JUMP
if (kexec_image->preserve_context) {
restore_processor_state();
device_power_up(PMSG_RESTORE);
Enable_irqs:
local_irq_enable();