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    Subject[PATCH 10/11] pstore/platform: Make automatic updates interval configurable
    Date
    There is no behavioural change, the default value is still 60 seconds.

    Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
    Acked-by: Kees Cook <keescook@chromium.org>
    ---
    fs/pstore/platform.c | 15 +++++++++++----
    1 file changed, 11 insertions(+), 4 deletions(-)

    diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
    index 61461ed..34ca314 100644
    --- a/fs/pstore/platform.c
    +++ b/fs/pstore/platform.c
    @@ -31,6 +31,7 @@
    #include <linux/slab.h>
    #include <linux/uaccess.h>
    #include <linux/hardirq.h>
    +#include <linux/jiffies.h>
    #include <linux/workqueue.h>

    #include "internal.h"
    @@ -40,7 +41,10 @@
    * whether the system is actually still running well enough
    * to let someone see the entry
    */
    -#define PSTORE_INTERVAL (60 * HZ)
    +static int pstore_update_ms = 60000;
    +module_param_named(update_ms, pstore_update_ms, int, 0600);
    +MODULE_PARM_DESC(update_ms, "milliseconds before pstore updates its content "
    + "(default is 60000; -1 means runtime updates are disabled)");

    static int pstore_new_entry;

    @@ -231,8 +235,11 @@ int pstore_register(struct pstore_info *psi)
    kmsg_dump_register(&pstore_dumper);
    pstore_register_console();

    - pstore_timer.expires = jiffies + PSTORE_INTERVAL;
    - add_timer(&pstore_timer);
    + if (pstore_update_ms >= 0) {
    + pstore_timer.expires = jiffies +
    + msecs_to_jiffies(pstore_update_ms);
    + add_timer(&pstore_timer);
    + }

    return 0;
    }
    @@ -291,7 +298,7 @@ static void pstore_timefunc(unsigned long dummy)
    schedule_work(&pstore_work);
    }

    - mod_timer(&pstore_timer, jiffies + PSTORE_INTERVAL);
    + mod_timer(&pstore_timer, jiffies + msecs_to_jiffies(pstore_update_ms));
    }

    module_param(backend, charp, 0444);
    --
    1.7.9.2


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