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s390/hibernate: add early resume function

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Some functions that do arch specific resume actions are called
directly from swsusp_asm64.S . Before we add another function call
provide a generic s390_early_resume function which can be used
for this purpose.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-08-29 19:36:49 +02:00 committed by Martin Schwidefsky
parent 0ff70ec88b
commit 77e844b964
4 changed files with 12 additions and 7 deletions
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1
arch/s390/include/asm/cio.h
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@ -296,6 +296,7 @@ static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
return 0;
}
void channel_subsystem_reinit(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);

9
arch/s390/kernel/suspend.c
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@ -10,6 +10,8 @@
#include <linux/suspend.h>
#include <linux/mm.h>
#include <asm/ctl_reg.h>
#include <asm/ipl.h>
#include <asm/cio.h>
/*
* References to section boundaries
@ -211,3 +213,10 @@ void restore_processor_state(void)
__ctl_set_bit(0,28);
local_mcck_enable();
}
/* Called at the end of swsusp_arch_resume */
void s390_early_resume(void)
{
lgr_info_log();
channel_subsystem_reinit();
}

7
arch/s390/kernel/swsusp_asm64.S
View File

@ -281,11 +281,8 @@ restore_registers:
lghi %r2,0
brasl %r14,arch_set_page_states
/* Log potential guest relocation */
brasl %r14,lgr_info_log
/* Reinitialize the channel subsystem */
brasl %r14,channel_subsystem_reinit
/* Call arch specific early resume code */
brasl %r14,s390_early_resume
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)

2
drivers/s390/cio/css.h
View File

@ -130,8 +130,6 @@ struct channel_subsystem {
extern struct channel_subsystem *channel_subsystems[];
void channel_subsystem_reinit(void);
/* Helper functions to build lists for the slow path. */
void css_schedule_eval(struct subchannel_id schid);
void css_schedule_eval_all(void);