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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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