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libceph: introduce ceph_pagelist_alloc()

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struct ceph_pagelist cannot be embedded into anything else because it
has its own refcount.  Merge allocation and initialization together.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
2018-09-28 15:38:34 +02:00
parent 24639ce560
commit 33165d4723
6 changed files with 28 additions and 26 deletions
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11
include/linux/ceph/pagelist.h
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@@ -23,16 +23,7 @@ struct ceph_pagelist_cursor {
size_t room; /* room remaining to reset to */
};
static inline void ceph_pagelist_init(struct ceph_pagelist *pl)
{
INIT_LIST_HEAD(&pl->head);
pl->mapped_tail = NULL;
pl->length = 0;
pl->room = 0;
INIT_LIST_HEAD(&pl->free_list);
pl->num_pages_free = 0;
refcount_set(&pl->refcnt, 1);
}
struct ceph_pagelist *ceph_pagelist_alloc(gfp_t gfp_flags);
extern void ceph_pagelist_release(struct ceph_pagelist *pl);