On 10/16/2017 7:21 PM, Kees Cook wrote:
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: "Rafael J. Wysocki" <r...@rjwysocki.net>
Cc: Len Brown <l...@kernel.org>
Cc: Tony Luck <tony.l...@intel.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Tyler Baicar <tbai...@codeaurora.org>
Cc: Will Deacon <will.dea...@arm.com>
Cc: James Morse <james.mo...@arm.com>
Cc: "Jonathan (Zhixiong) Zhang" <zjzh...@codeaurora.org>
Cc: Shiju Jose <shiju.j...@huawei.com>
Cc: linux-a...@vger.kernel.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
Tested-by: Tyler Baicar <tbai...@codeaurora.org>

Verified that the polled error sources still work with this timer setup.

Thanks,
Tyler
---
  drivers/acpi/apei/ghes.c | 7 +++----
  1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 3c3a37b8503b..ebaa51ba8a22 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -774,9 +774,9 @@ static void ghes_add_timer(struct ghes *ghes)
        add_timer(&ghes->timer);
  }
-static void ghes_poll_func(unsigned long data)
+static void ghes_poll_func(struct timer_list *t)
  {
-       struct ghes *ghes = (void *)data;
+       struct ghes *ghes = from_timer(ghes, t, timer);
ghes_proc(ghes);
        if (!(ghes->flags & GHES_EXITING))
@@ -1147,8 +1147,7 @@ static int ghes_probe(struct platform_device *ghes_dev)
switch (generic->notify.type) {
        case ACPI_HEST_NOTIFY_POLLED:
-               setup_deferrable_timer(&ghes->timer, ghes_poll_func,
-                                      (unsigned long)ghes);
+               timer_setup(&ghes->timer, ghes_poll_func, TIMER_DEFERRABLE);
                ghes_add_timer(ghes);
                break;
        case ACPI_HEST_NOTIFY_EXTERNAL:

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