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Subject[ 13/23] [Suspend2] Add support for thawing just kernel threads or all threads.
Date

Modify the thaw_processes routine so that it takes and implements a
parameter saying whether to thaw all processes, or just kernel space.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

kernel/power/process.c | 25 +++++++++++++++++++------
1 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/kernel/power/process.c b/kernel/power/process.c
index a3aca9a..dffe645 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -182,13 +182,26 @@ static int freeze_process(struct notifie
return 0;
}

-void thaw_processes(void)
+void thaw_processes(int do_all_threads)
{
- freezer_message("Restarting tasks..");
- complete_all(&thaw);
- while (atomic_read(&nr_frozen) > 0)
- schedule();
- freezer_message("done\n");
+ if (do_all_threads) {
+ clear_freezer_state(FREEZER_ON);
+ clear_freezer_state(ABORT_FREEZING);
+ }
+
+ complete_all(&kernelspace_thaw);
+ while (atomic_read(&nr_kernelspace_frozen) > 0)
+ yield();
+
+ init_completion(&kernelspace_thaw);
+ freezer_make_fses_rw();
+
+ if (do_all_threads) {
+ complete_all(&userspace_thaw);
+ while (atomic_read(&nr_userspace_frozen) > 0)
+ yield();
+ init_completion(&userspace_thaw);
+ }
}

static inline void freeze(struct task_struct *p)
--
Nigel Cunningham nigel at suspend2 dot net
-
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