forked from luck/tmp_suning_uos_patched
e1fa2e136f
This patch renames the raw hard_irq_{enable,disable} into
__hard_irq_{enable,disable} and introduces a higher level hard_irq_disable()
function that can be used by any code to enforce that IRQs are fully disabled,
not only lazy disabled.
The difference with the __ versions is that it will update some per-processor
fields so that the kernel keeps track and properly re-enables them in the next
local_irq_disable();
This prepares powerpc for my next patch that introduces hard_irq_disable()
generically.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
40 lines
924 B
C
40 lines
924 B
C
/*
|
|
* Common powerpc suspend code for 32 and 64 bits
|
|
*
|
|
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/system.h>
|
|
#include <asm/current.h>
|
|
#include <asm/mmu_context.h>
|
|
|
|
void save_processor_state(void)
|
|
{
|
|
/*
|
|
* flush out all the special registers so we don't need
|
|
* to save them in the snapshot
|
|
*/
|
|
flush_fp_to_thread(current);
|
|
flush_altivec_to_thread(current);
|
|
flush_spe_to_thread(current);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
hard_irq_disable();
|
|
#endif
|
|
|
|
}
|
|
|
|
void restore_processor_state(void)
|
|
{
|
|
#ifdef CONFIG_PPC32
|
|
set_context(current->active_mm->context.id, current->active_mm->pgd);
|
|
#endif
|
|
}
|