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Merge branch 'svn-trunk'

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This commit is contained in:
Bart Van Assche
2019-03-09 21:22:39 -08:00
parent 56e98a2deb c03a6ffd5e
commit 0eacad533b
1 changed files with 68 additions and 0 deletions
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68
scst/include/backport.h
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@@ -30,6 +30,9 @@
#endif
#include <linux/eventpoll.h>
#include <linux/iocontext.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
#include <linux/percpu-refcount.h>
#endif
#include <linux/scatterlist.h> /* struct scatterlist */
#include <linux/slab.h> /* kmalloc() */
#include <linux/stddef.h> /* sizeof_field() */
@@ -871,6 +874,71 @@ static inline struct ib_pd *ib_alloc_pd_backport(struct ib_device *device)
#define set_cpus_allowed_ptr(p, new_mask) set_cpus_allowed((p), *(new_mask))
#endif
/* <linux/percpu-refcount.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0) && RHEL_MAJOR -0 <= 6
struct percpu_ref;
typedef void (percpu_ref_func_t)(struct percpu_ref *);
struct percpu_ref {
atomic_long_t count;
percpu_ref_func_t *release;
};
/* @flags for percpu_ref_init() */
enum {
PERCPU_REF_INIT_ATOMIC = 1 << 0,
PERCPU_REF_INIT_DEAD = 1 << 1,
};
static inline int __must_check percpu_ref_init(struct percpu_ref *ref,
percpu_ref_func_t *release, unsigned int flags,
gfp_t gfp)
{
WARN_ON_ONCE(flags != PERCPU_REF_INIT_ATOMIC);
atomic_long_set(&ref->count, 1);
ref->release = release;
return 0;
}
static inline void percpu_ref_exit(struct percpu_ref *ref)
{
}
static inline void percpu_ref_switch_to_atomic(struct percpu_ref *ref,
percpu_ref_func_t *confirm_switch)
{
}
static inline void percpu_ref_switch_to_atomic_sync(struct percpu_ref *ref)
{
}
static inline void percpu_ref_switch_to_percpu(struct percpu_ref *ref)
{
}
static inline void percpu_ref_get(struct percpu_ref *ref)
{
atomic_long_inc(&ref->count);
}
static inline void percpu_ref_put(struct percpu_ref *ref)
{
if (unlikely(atomic_long_dec_and_test(&ref->count)))
ref->release(ref);
}
static inline void percpu_ref_kill(struct percpu_ref *ref)
{
percpu_ref_put(ref);
}
static inline bool percpu_ref_is_zero(struct percpu_ref *ref)
{
return !atomic_long_read(&ref->count);
}
#endif
/* <linux/scatterlist.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)