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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-09 19:01:47 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-09 19:01:47 -0800 |
commit | 67dd2f5a669f48e48ea1013fb80522adca8287f4 (patch) | |
tree | eee4e7f15df90f899211cde0a669d661085de05d /arch/s390/mm/cmm.c | |
parent | 5327b9b83a9c45a3fcbcda224a2b02d9eea9f6bb (diff) | |
parent | 42d61b9b415686d81eaa022b846737548876e51d (diff) | |
download | op-kernel-dev-67dd2f5a669f48e48ea1013fb80522adca8287f4.zip op-kernel-dev-67dd2f5a669f48e48ea1013fb80522adca8287f4.tar.gz |
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (72 commits)
[S390] 3215/3270 console: remove wrong comment
[S390] dasd: remove BKL from extended error reporting code
[S390] vmlogrdr: remove BKL
[S390] vmur: remove BKL
[S390] zcrypt: remove BKL
[S390] 3270: remove BKL
[S390] vmwatchdog: remove lock_kernel() from open() function
[S390] monwriter: remove lock_kernel() from open() function
[S390] monreader: remove lock_kernel() from open() function
[S390] s390: remove unused nfsd #includes
[S390] ftrace: build ftrace.o when CONFIG_FTRACE_SYSCALLS is set for s390
[S390] etr/stp: put correct per cpu variable
[S390] tty3270: move keyboard compat ioctls
[S390] sclp: improve servicability setting
[S390] s390: use change recording override for kernel mapping
[S390] MAINTAINERS: Add s390 drivers block
[S390] use generic sockios.h header file
[S390] use generic termbits.h header file
[S390] smp: remove unused typedef and defines
[S390] cmm: free pages on hibernate.
...
Diffstat (limited to 'arch/s390/mm/cmm.c')
-rw-r--r-- | arch/s390/mm/cmm.c | 61 |
1 files changed, 50 insertions, 11 deletions
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index ff58779..76a3637 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -18,6 +18,7 @@ #include <linux/swap.h> #include <linux/kthread.h> #include <linux/oom.h> +#include <linux/suspend.h> #include <asm/pgalloc.h> #include <asm/uaccess.h> @@ -44,6 +45,7 @@ static volatile long cmm_pages_target; static volatile long cmm_timed_pages_target; static long cmm_timeout_pages; static long cmm_timeout_seconds; +static int cmm_suspended; static struct cmm_page_array *cmm_page_list; static struct cmm_page_array *cmm_timed_page_list; @@ -147,9 +149,9 @@ cmm_thread(void *dummy) while (1) { rc = wait_event_interruptible(cmm_thread_wait, - (cmm_pages != cmm_pages_target || - cmm_timed_pages != cmm_timed_pages_target || - kthread_should_stop())); + (!cmm_suspended && (cmm_pages != cmm_pages_target || + cmm_timed_pages != cmm_timed_pages_target)) || + kthread_should_stop()); if (kthread_should_stop() || rc == -ERESTARTSYS) { cmm_pages_target = cmm_pages; cmm_timed_pages_target = cmm_timed_pages; @@ -410,6 +412,38 @@ cmm_smsg_target(char *from, char *msg) static struct ctl_table_header *cmm_sysctl_header; +static int cmm_suspend(void) +{ + cmm_suspended = 1; + cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list); + cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list); + return 0; +} + +static int cmm_resume(void) +{ + cmm_suspended = 0; + cmm_kick_thread(); + return 0; +} + +static int cmm_power_event(struct notifier_block *this, + unsigned long event, void *ptr) +{ + switch (event) { + case PM_POST_HIBERNATION: + return cmm_resume(); + case PM_HIBERNATION_PREPARE: + return cmm_suspend(); + default: + return NOTIFY_DONE; + } +} + +static struct notifier_block cmm_power_notifier = { + .notifier_call = cmm_power_event, +}; + static int cmm_init (void) { @@ -418,7 +452,7 @@ cmm_init (void) #ifdef CONFIG_CMM_PROC cmm_sysctl_header = register_sysctl_table(cmm_dir_table); if (!cmm_sysctl_header) - goto out; + goto out_sysctl; #endif #ifdef CONFIG_CMM_IUCV rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target); @@ -428,17 +462,21 @@ cmm_init (void) rc = register_oom_notifier(&cmm_oom_nb); if (rc < 0) goto out_oom_notify; + rc = register_pm_notifier(&cmm_power_notifier); + if (rc) + goto out_pm; init_waitqueue_head(&cmm_thread_wait); init_timer(&cmm_timer); cmm_thread_ptr = kthread_run(cmm_thread, NULL, "cmmthread"); rc = IS_ERR(cmm_thread_ptr) ? PTR_ERR(cmm_thread_ptr) : 0; - if (!rc) - goto out; - /* - * kthread_create failed. undo all the stuff from above again. - */ - unregister_oom_notifier(&cmm_oom_nb); + if (rc) + goto out_kthread; + return 0; +out_kthread: + unregister_pm_notifier(&cmm_power_notifier); +out_pm: + unregister_oom_notifier(&cmm_oom_nb); out_oom_notify: #ifdef CONFIG_CMM_IUCV smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target); @@ -446,8 +484,8 @@ out_smsg: #endif #ifdef CONFIG_CMM_PROC unregister_sysctl_table(cmm_sysctl_header); +out_sysctl: #endif -out: return rc; } @@ -455,6 +493,7 @@ static void cmm_exit(void) { kthread_stop(cmm_thread_ptr); + unregister_pm_notifier(&cmm_power_notifier); unregister_oom_notifier(&cmm_oom_nb); cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list); cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list); |