staging: greybus: kernel_ver.h: remove lots of stuff

Now that we do not care about the kernel version we are building
against, we can strip out lots of backward compatibilty that was added
to kernel_ver.h in order to write semi-portable driver code.

To start with, remove the functions and #defines that are now in the
kernel tree, no need to have duplicate copies of them all.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/kernel_ver.h b/drivers/staging/greybus/kernel_ver.h
index 97e7ac9498fd078ada856884684902137d624262..eda9485459171c22a768c9db0e3739257d028251 100644 (file)
--- a/drivers/staging/greybus/kernel_ver.h
+++ b/drivers/staging/greybus/kernel_ver.h
@@ -22,49 +22,6 @@
 #define CORE_OWNS_PSY_STRUCT
 #endif
 
-#ifndef __ATTR_WO
-#define __ATTR_WO(_name) {                                             \
-       .attr   = { .name = __stringify(_name), .mode = S_IWUSR },      \
-       .store  = _name##_store,                                        \
-}
-#endif
-
-#ifndef __ATTR_RW
-#define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO),            \
-                               _name##_show, _name##_store)
-#endif
-
-#ifndef DEVICE_ATTR_RO
-#define DEVICE_ATTR_RO(_name) \
-       struct device_attribute dev_attr_##_name = __ATTR_RO(_name)
-#endif
-
-#ifndef DEVICE_ATTR_WO
-#define DEVICE_ATTR_WO(_name) \
-       struct device_attribute dev_attr_##_name = __ATTR_WO(_name)
-#endif
-
-#ifndef DEVICE_ATTR_RW
-#define DEVICE_ATTR_RW(_name) \
-       struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
-#endif
-
-#ifndef U8_MAX
-#define U8_MAX ((u8)~0U)
-#endif /* ! U8_MAX */
-
-#ifndef U16_MAX
-#define U16_MAX        ((u16)(~0U))
-#endif /* !U16_MAX */
-
-#ifndef U32_MAX
-#define U32_MAX        ((u32)(~0U))
-#endif /* !U32_MAX */
-
-#ifndef U64_MAX
-#define U64_MAX        ((u64)(~0U))
-#endif /* !U64_MAX */
-
 /*
  * The GPIO api sucks rocks in places, like removal, so work around their
  * explicit requirements of catching the return value for kernels older than
@@ -87,54 +44,6 @@ static inline void gb_gpiochip_remove(struct gpio_chip *chip)
 }
 #endif
 
-/*
- * ATTRIBUTE_GROUPS showed up in 3.11-rc2, but we need to build on 3.10, so add
- * it here.
- */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
-#include <linux/sysfs.h>
-
-#define ATTRIBUTE_GROUPS(name)                                 \
-static const struct attribute_group name##_group = {           \
-       .attrs = name##_attrs,                                  \
-};                                                             \
-static const struct attribute_group *name##_groups[] = {       \
-       &name##_group,                                          \
-       NULL,                                                   \
-}
-
-static inline int sysfs_create_groups(struct kobject *kobj,
-                                     const struct attribute_group **groups)
-{
-       int error = 0;
-       int i;
-
-       if (!groups)
-               return 0;
-
-       for (i = 0; groups[i]; i++) {
-               error = sysfs_create_group(kobj, groups[i]);
-               if (error) {
-                       while (--i >= 0)
-                               sysfs_remove_group(kobj, groups[i]);
-                       break;
-               }
-       }
-       return error;
-}
-
-static inline void sysfs_remove_groups(struct kobject *kobj,
-                                      const struct attribute_group **groups)
-{
-       int i;
-
-       if (!groups)
-               return;
-       for (i = 0; groups[i]; i++)
-               sysfs_remove_group(kobj, groups[i]);
-}
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0)
 #define MMC_HS400_SUPPORTED
 #define MMC_DDR52_DEFINED
@@ -148,110 +57,6 @@ static inline void sysfs_remove_groups(struct kobject *kobj,
 #define MMC_POWER_UNDEFINED_SUPPORTED
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
-#include <linux/scatterlist.h>
-static inline bool sg_miter_get_next_page(struct sg_mapping_iter *miter)
-{
-       if (!miter->__remaining) {
-               struct scatterlist *sg;
-               unsigned long pgoffset;
-
-               if (!__sg_page_iter_next(&miter->piter))
-                       return false;
-
-               sg = miter->piter.sg;
-               pgoffset = miter->piter.sg_pgoffset;
-
-               miter->__offset = pgoffset ? 0 : sg->offset;
-               miter->__remaining = sg->offset + sg->length -
-                               (pgoffset << PAGE_SHIFT) - miter->__offset;
-               miter->__remaining = min_t(unsigned long, miter->__remaining,
-                                          PAGE_SIZE - miter->__offset);
-       }
-
-       return true;
-}
-
-static inline bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset)
-{
-       sg_miter_stop(miter);
-
-       while (offset) {
-               off_t consumed;
-
-               if (!sg_miter_get_next_page(miter))
-                       return false;
-
-               consumed = min_t(off_t, offset, miter->__remaining);
-               miter->__offset += consumed;
-               miter->__remaining -= consumed;
-               offset -= consumed;
-       }
-
-       return true;
-}
-
-static inline size_t _sg_copy_buffer(struct scatterlist *sgl,
-                                    unsigned int nents, void *buf,
-                                    size_t buflen, off_t skip,
-                                    bool to_buffer)
-{
-       unsigned int offset = 0;
-       struct sg_mapping_iter miter;
-       unsigned long flags;
-       unsigned int sg_flags = SG_MITER_ATOMIC;
-
-       if (to_buffer)
-               sg_flags |= SG_MITER_FROM_SG;
-       else
-               sg_flags |= SG_MITER_TO_SG;
-
-       sg_miter_start(&miter, sgl, nents, sg_flags);
-
-       if (!sg_miter_skip(&miter, skip))
-               return false;
-
-       local_irq_save(flags);
-
-       while (sg_miter_next(&miter) && offset < buflen) {
-               unsigned int len;
-
-               len = min(miter.length, buflen - offset);
-
-               if (to_buffer)
-                       memcpy(buf + offset, miter.addr, len);
-               else
-                       memcpy(miter.addr, buf + offset, len);
-
-               offset += len;
-       }
-
-       sg_miter_stop(&miter);
-
-       local_irq_restore(flags);
-       return offset;
-}
-
-static inline size_t sg_pcopy_to_buffer(struct scatterlist *sgl,
-                                       unsigned int nents, void *buf,
-                                       size_t buflen, off_t skip)
-{
-       return _sg_copy_buffer(sgl, nents, buf, buflen, skip, true);
-}
-
-static inline size_t sg_pcopy_from_buffer(struct scatterlist *sgl,
-                                         unsigned int nents, void *buf,
-                                         size_t buflen, off_t skip)
-{
-       return _sg_copy_buffer(sgl, nents, buf, buflen, skip, false);
-}
-#endif
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-#define list_last_entry(ptr, type, member) \
-       list_entry((ptr)->prev, type, member)
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
 /*
  * At this time the internal API for the set brightness was changed to the async
@@ -273,19 +78,6 @@ static inline size_t sg_pcopy_from_buffer(struct scatterlist *sgl,
 #define LED_HAVE_SET_BLOCKING
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0)
-/*
- * From this version upper it was introduced the possibility to disable led
- * sysfs entries to handle control of the led device to v4l2, which was
- * implemented later. So, before that this should return false.
- */
-#include <linux/leds.h>
-static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
-{
-       return false;
-}
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
 /*
  * New helper functions for registering/unregistering flash led devices as v4l2
@@ -329,82 +121,6 @@ static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
 #define SPI_CORE_SUPPORT_PM
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-/**
- * reinit_completion - reinitialize a completion structure
- * @x:  pointer to completion structure that is to be reinitialized
- *
- * This inline function should be used to reinitialize a completion structure
- * so it can be reused. This is especially important after complete_all() is
- * used.
- */
-static inline void reinit_completion(struct completion *x)
-{
-       x->done = 0;
-}
-#endif
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
-#include <linux/pwm.h>
-/*
- * pwm_is_enabled() was first defined in 4.3.
- * PWMF_ENABLED was first defined in 3.5-rc2, but our code is
- * always newer than that.
-*/
-static inline bool pwm_is_enabled(const struct pwm_device *pwm)
-{
-       return test_bit(PWMF_ENABLED, &pwm->flags);
-}
-#endif
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
-/**
- * kstrtobool - convert common user inputs into boolean values
- * @s: input string
- * @res: result
- *
- * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
- * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL.  Value
- * pointed to by res is updated upon finding a match.
- */
-static inline int kstrtobool(const char *s, bool *res)
-{
-       if (!s)
-               return -EINVAL;
-
-       switch (s[0]) {
-       case 'y':
-       case 'Y':
-       case '1':
-               *res = true;
-               return 0;
-       case 'n':
-       case 'N':
-       case '0':
-               *res = false;
-               return 0;
-       case 'o':
-       case 'O':
-               switch (s[1]) {
-               case 'n':
-               case 'N':
-                       *res = true;
-                       return 0;
-               case 'f':
-               case 'F':
-                       *res = false;
-                       return 0;
-               default:
-                       break;
-               }
-       default:
-               break;
-       }
-
-       return -EINVAL;
-}
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
 /*
  * After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is