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staging: erofs: fold in `__update_workgrp_llen' 

There is the only one user to use `__update_workgrp_llen'.
Fold it in `z_erofs_vle_work_iter_begin' and cleanup related code.

Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2018-09-19 13:49:06 +08:00 committed by Greg Kroah-Hartman
parent 83a3b2fffb
commit b27661cf99
1 changed files with 7 additions and 13 deletions
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20
drivers/staging/erofs/unzip_vle.c
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@ -422,18 +422,6 @@ z_erofs_vle_work_register(const struct z_erofs_vle_work_finder *f,
return work;
}
static inline void __update_workgrp_llen(struct z_erofs_vle_workgroup *grp,
unsigned int llen)
{
while (1) {
unsigned int orig_llen = grp->llen;
if (orig_llen >= llen || orig_llen ==
cmpxchg(&grp->llen, orig_llen, llen))
break;
}
}
#define builder_is_followed(builder) \
((builder)->role >= Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED)
@ -466,7 +454,13 @@ static int z_erofs_vle_work_iter_begin(struct z_erofs_vle_work_builder *builder,
repeat:
work = z_erofs_vle_work_lookup(&finder);
if (work != NULL) {
__update_workgrp_llen(grp, map->m_llen);
unsigned int orig_llen;
/* increase workgroup `llen' if needed */
while ((orig_llen = READ_ONCE(grp->llen)) < map->m_llen &&
orig_llen != cmpxchg_relaxed(&grp->llen,
orig_llen, map->m_llen))
cpu_relax();
goto got_it;
}