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/*
* Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* Copyright (c) 2012 Intel Corporation. All rights reserved.
*/
#include "drm_linux.h"
void
kref_init(struct kref *kref)
{
atomic_set(&kref->refcount, 1);
}
void
kref_get(struct kref *kref)
{
atomic_inc(&kref->refcount);
}
void
kref_put(struct kref *kref, void (*release)(struct kref *kref))
{
if (!atomic_dec_uint_nv(&kref->refcount))
release(kref);
}
unsigned int
hweight16(unsigned int w)
{
w = (w & 0x5555) + ((w >> 1) & 0x5555);
w = (w & 0x3333) + ((w >> 2) & 0x3333);
w = (w & 0x0F0F) + ((w >> 4) & 0x0F0F);
w = (w & 0x00FF) + ((w >> 8) & 0x00FF);
return (w);
}
long
IS_ERR(const void *ptr)
{
return ((unsigned long)ptr >= (unsigned long)-255);
}
#ifdef NEVER
/*
* kfree wrapper to Solaris VM.
*/
void
kfree(void *buf, size_t size) {
}
#endif
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