Re: [PATCH] Staging: lustre: lustre: lmv: Compress return logic into one line.

From: Dilger, Andreas
Date: Mon Jan 09 2017 - 00:49:18 EST

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On Jan 4, 2017, at 22:14, Gustavo A. R. Silva <silvagustavosilva@xxxxxxxxx> wrote:
>
> Simplify return logic to avoid unnecessary variable assignments.
> These issues were detected using Coccinelle and the following semantic patch:
>
> @@
> local idexpression ret;
> expression e;
> @@
>
> -ret =
> +return
> e;
> -return ret;
>
> Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>

Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>

> ---
> drivers/staging/lustre/lustre/lmv/lmv_obd.c | 58 ++++++++---------------------
> 1 file changed, 16 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
> index f124f6c..76a0306 100644
> --- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
> +++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
> @@ -771,7 +771,6 @@ static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
> struct lustre_kernelcomm *lk,
> void __user *uarg)
> {
> - int rc = 0;
> __u32 i;
>
> /* unregister request (call from llapi_hsm_copytool_fini) */
> @@ -791,9 +790,7 @@ static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
> * Unreached coordinators will get EPIPE on next requests
> * and will unregister automatically.
> */
> - rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
> -
> - return rc;
> + return libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
> }
>
> static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
> @@ -1425,8 +1422,7 @@ static int lmv_getstatus(struct obd_export *exp,
> if (rc)
> return rc;
>
> - rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid);
> - return rc;
> + return md_getstatus(lmv->tgts[0]->ltd_exp, fid);
> }
>
> static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
> @@ -1447,10 +1443,8 @@ static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
> + return md_getxattr(tgt->ltd_exp, fid, valid, name, input,
> input_size, output_size, flags, request);
> -
> - return rc;
> }
>
> static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
> @@ -1472,11 +1466,9 @@ static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
> + return md_setxattr(tgt->ltd_exp, fid, valid, name, input,
> input_size, output_size, flags, suppgid,
> request);
> -
> - return rc;
> }
>
> static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
> @@ -1500,9 +1492,7 @@ static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
> return 0;
> }
>
> - rc = md_getattr(tgt->ltd_exp, op_data, request);
> -
> - return rc;
> + return md_getattr(tgt->ltd_exp, op_data, request);
> }
>
> static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
> @@ -1549,8 +1539,7 @@ static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
> return PTR_ERR(tgt);
>
> CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
> - rc = md_close(tgt->ltd_exp, op_data, mod, request);
> - return rc;
> + return md_close(tgt->ltd_exp, op_data, mod, request);
> }
>
> /**
> @@ -1743,10 +1732,8 @@ lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
> CDEBUG(D_INODE, "ENQUEUE '%s' on " DFID " -> mds #%u\n",
> LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
>
> - rc = md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
> + return md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
> extra_lock_flags);
> -
> - return rc;
> }
>
> static int
> @@ -1894,9 +1881,7 @@ static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
> if (rc != 0)
> return rc;
>
> - rc = md_link(tgt->ltd_exp, op_data, request);
> -
> - return rc;
> + return md_link(tgt->ltd_exp, op_data, request);
> }
>
> static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
> @@ -2109,8 +2094,7 @@ static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_sync(tgt->ltd_exp, fid, request);
> - return rc;
> + return md_sync(tgt->ltd_exp, fid, request);
> }
>
> /**
> @@ -2428,17 +2412,14 @@ static int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
> return rc;
>
> if (unlikely(lsm)) {
> - rc = lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
> - return rc;
> + return lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
> }
>
> tgt = lmv_find_target(lmv, &op_data->op_fid1);
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
> -
> - return rc;
> + return md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
> }
>
> /**
> @@ -2922,13 +2903,11 @@ static int lmv_set_lock_data(struct obd_export *exp,
> {
> struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
> struct lmv_tgt_desc *tgt = lmv->tgts[0];
> - int rc;
>
> if (!tgt || !tgt->ltd_exp)
> return -EINVAL;
>
> - rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
> - return rc;
> + return md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
> }
>
> static enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
> @@ -3050,8 +3029,7 @@ static int lmv_intent_getattr_async(struct obd_export *exp,
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
> - return rc;
> + return md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
> }
>
> static int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
> @@ -3070,8 +3048,7 @@ static int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
> if (IS_ERR(tgt))
> return PTR_ERR(tgt);
>
> - rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
> - return rc;
> + return md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
> }
>
> static int
> @@ -3113,8 +3090,7 @@ static int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
> }
>
> if (oqctl->qc_cmd != Q_GETOQUOTA) {
> - rc = obd_quotactl(tgt->ltd_exp, oqctl);
> - return rc;
> + return obd_quotactl(tgt->ltd_exp, oqctl);
> }
>
> for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
> @@ -3234,13 +3210,11 @@ static struct md_ops lmv_md_ops = {
> static int __init lmv_init(void)
> {
> struct lprocfs_static_vars lvars;
> - int rc;
>
> lprocfs_lmv_init_vars(&lvars);
>
> - rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
> + return class_register_type(&lmv_obd_ops, &lmv_md_ops,
> LUSTRE_LMV_NAME, NULL);
> - return rc;
> }
>
> static void lmv_exit(void)
> --
> 2.5.0
>

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