[PATCH 24/45] staging/lustre/obdecho: Adjust NULL comparison codestyle

green
2016-02-16T05:48:39Z

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
.../staging/lustre/lustre/obdecho/echo_client.c | 61 ++++++++++------------
1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdecho/echo_client.c b/drivers/staging/lustre/lustre/obdecho/echo_client.c
index 4ca82af..ca87cc2 100644
--- a/drivers/staging/lustre/lustre/obdecho/echo_client.c
+++ b/drivers/staging/lustre/lustre/obdecho/echo_client.c
@@ -146,7 +146,7 @@ static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
struct echo_thread_info *info;

info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
- LASSERT(info != NULL);
+ LASSERT(info);
return info;
}

@@ -267,7 +267,7 @@ static void echo_page_completion(const struct lu_env *env,
const struct cl_page_slice *slice,
int ioret)
{
- LASSERT(slice->cpl_page->cp_sync_io != NULL);
+ LASSERT(slice->cpl_page->cp_sync_io);
}

static void echo_page_fini(const struct lu_env *env,
@@ -393,13 +393,13 @@ static int echo_lock_init(const struct lu_env *env,
struct echo_lock *el;

el = kmem_cache_alloc(echo_lock_kmem, GFP_NOFS | __GFP_ZERO);
- if (el != NULL) {
+ if (el) {
cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
el->el_object = cl2echo_obj(obj);
INIT_LIST_HEAD(&el->el_chain);
atomic_set(&el->el_refcount, 0);
}
- return el == NULL ? -ENOMEM : 0;
+ return !el ? -ENOMEM : 0;
}

static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
@@ -439,7 +439,7 @@ static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
under = ed->ed_next;
below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
under);
- if (below == NULL)
+ if (!below)
return -ENOMEM;
lu_object_add(obj, below);
}
@@ -470,12 +470,12 @@ static int echo_alloc_memmd(struct echo_device *ed,
int lsm_size;

/* If export is lov/osc then use their obd method */
- if (ed->ed_next != NULL)
+ if (ed->ed_next)
return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp);
/* OFD has no unpackmd method, do everything here */
lsm_size = lov_stripe_md_size(1);

- LASSERT(*lsmp == NULL);
+ LASSERT(!*lsmp);
*lsmp = kzalloc(lsm_size, GFP_NOFS);
if (!*lsmp)
return -ENOMEM;
@@ -498,12 +498,11 @@ static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
int lsm_size;

/* If export is lov/osc then use their obd method */
- if (ed->ed_next != NULL)
+ if (ed->ed_next)
return obd_free_memmd(ed->ed_ec->ec_exp, lsmp);
/* OFD has no unpackmd method, do everything here */
lsm_size = lov_stripe_md_size(1);

- LASSERT(*lsmp != NULL);
kfree((*lsmp)->lsm_oinfo[0]);
kfree(*lsmp);
*lsmp = NULL;
@@ -562,9 +561,9 @@ static struct lu_object *echo_object_alloc(const struct lu_env *env,
struct lu_object *obj = NULL;

/* we're the top dev. */
- LASSERT(hdr == NULL);
+ LASSERT(!hdr);
eco = kmem_cache_alloc(echo_object_kmem, GFP_NOFS | __GFP_ZERO);
- if (eco != NULL) {
+ if (eco) {
struct cl_object_header *hdr = &eco->eo_hdr;

obj = &echo_obj2cl(eco)->co_lu;
@@ -627,7 +626,7 @@ static void *echo_thread_key_init(const struct lu_context *ctx,
struct echo_thread_info *info;

info = kmem_cache_alloc(echo_thread_kmem, GFP_NOFS | __GFP_ZERO);
- if (info == NULL)
+ if (!info)
info = ERR_PTR(-ENOMEM);
return info;
}
@@ -658,7 +657,7 @@ static void *echo_session_key_init(const struct lu_context *ctx,
struct echo_session_info *session;

session = kmem_cache_alloc(echo_session_kmem, GFP_NOFS | __GFP_ZERO);
- if (session == NULL)
+ if (!session)
session = ERR_PTR(-ENOMEM);
return session;
}
@@ -715,11 +714,11 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,

cleanup = 2;
obd = class_name2obd(lustre_cfg_string(cfg, 0));
- LASSERT(obd != NULL);
- LASSERT(env != NULL);
+ LASSERT(obd);
+ LASSERT(env);

tgt = class_name2obd(lustre_cfg_string(cfg, 1));
- if (tgt == NULL) {
+ if (!tgt) {
CERROR("Can not find tgt device %s\n",
lustre_cfg_string(cfg, 1));
rc = -ENODEV;
@@ -748,13 +747,12 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,

/* if echo client is to be stacked upon ost device, the next is
* NULL since ost is not a clio device so far */
- if (next != NULL && !lu_device_is_cl(next))
+ if (next && !lu_device_is_cl(next))
next = NULL;

tgt_type_name = tgt->obd_type->typ_name;
- if (next != NULL) {
- LASSERT(next != NULL);
- if (next->ld_site != NULL) {
+ if (next) {
+ if (next->ld_site) {
rc = -EBUSY;
goto out;
}
@@ -1063,7 +1061,6 @@ static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
struct list_head *el;
int found = 0, still_used = 0;

- LASSERT(ec != NULL);
spin_lock(&ec->ec_lock);
list_for_each(el, &ec->ec_locks) {
ecl = list_entry(el, struct echo_lock, el_chain);
@@ -1121,7 +1118,7 @@ static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset,
int i;

LASSERT((offset & ~CFS_PAGE_MASK) == 0);
- LASSERT(ed->ed_next != NULL);
+ LASSERT(ed->ed_next);
env = cl_env_get(&refcheck);
if (IS_ERR(env))
return PTR_ERR(env);
@@ -1393,11 +1390,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
brw_flags = OBD_BRW_ASYNC;

pga = kcalloc(npages, sizeof(*pga), GFP_NOFS);
- if (pga == NULL)
+ if (!pga)
return -ENOMEM;

pages = kcalloc(npages, sizeof(*pages), GFP_NOFS);
- if (pages == NULL) {
+ if (!pages) {
kfree(pga);
return -ENOMEM;
}
@@ -1406,11 +1403,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
i < npages;
i++, pgp++, off += PAGE_CACHE_SIZE) {

- LASSERT(pgp->pg == NULL); /* for cleanup */
+ LASSERT(!pgp->pg); /* for cleanup */

rc = -ENOMEM;
pgp->pg = alloc_page(gfp_mask);
- if (pgp->pg == NULL)
+ if (!pgp->pg)
goto out;

pages[i] = pgp->pg;
@@ -1425,7 +1422,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
}

/* brw mode can only be used at client */
- LASSERT(ed->ed_next != NULL);
+ LASSERT(ed->ed_next);
rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);

out:
@@ -1433,7 +1430,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
verify = 0;

for (i = 0, pgp = pga; i < npages; i++, pgp++) {
- if (pgp->pg == NULL)
+ if (!pgp->pg)
continue;

if (verify) {
@@ -1475,7 +1472,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS);
rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS);

- if (lnb == NULL || rnb == NULL) {
+ if (!lnb || !rnb) {
ret = -ENOMEM;
goto out;
}
@@ -1513,7 +1510,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
struct page *page = lnb[i].page;

/* read past eof? */
- if (page == NULL && lnb[i].rc == 0)
+ if (!page && lnb[i].rc == 0)
continue;

if (async)
@@ -1582,7 +1579,7 @@ static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
if (test_mode == 1)
async = 0;

- if (ed->ed_next == NULL && test_mode != 3) {
+ if (!ed->ed_next && test_mode != 3) {
test_mode = 3;
data->ioc_plen1 = data->ioc_count;
}
@@ -1834,7 +1831,7 @@ static int echo_client_disconnect(struct obd_export *exp)
{
int rc;

- if (exp == NULL) {
+ if (!exp) {
rc = -EINVAL;
goto out;
}
--
2.1.0