nfsd4: setclientid_confirm callback-change fixes

[safe/jmp/linux-2.6] / drivers / gpio / gpiolib.c

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 83c3fe3..51a8d41 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -69,20 +69,24 @@ static inline void desc_set_label(struct gpio_desc *d, const char *label)
  * those calls have no teeth) we can't avoid autorequesting.  This nag
  * message should motivate switching to explicit requests... so should
  * the weaker cleanup after faults, compared to gpio_request().
+ *
+ * NOTE: the autorequest mechanism is going away; at this point it's
+ * only "legal" in the sense that (old) code using it won't break yet,
+ * but instead only triggers a WARN() stack dump.
  */
 static int gpio_ensure_requested(struct gpio_desc *desc, unsigned offset)
 {
-       if (test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0) {
-               struct gpio_chip *chip = desc->chip;
-               int gpio = chip->base + offset;
+       const struct gpio_chip *chip = desc->chip;
+       const int gpio = chip->base + offset;
 
+       if (WARN(test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0,
+                       "autorequest GPIO-%d\n", gpio)) {
                if (!try_module_get(chip->owner)) {
                        pr_err("GPIO-%d: module can't be gotten \n", gpio);
                        clear_bit(FLAG_REQUESTED, &desc->flags);
                        /* lose */
                        return -EIO;
                }
-               pr_warning("GPIO-%d autorequested\n", gpio);
                desc_set_label(desc, "[auto]");
                /* caller must chip->request() w/o spinlock */
                if (chip->request)