[PATCH] Fix various coding style problem

[PATCH] Fix various coding style problem

[Swee Hua Law]

1) do not initialise globals to NULL
2) improve readability of hlist_for_each_entry_safe()
3) move */ to a separate line
4) change symbol == NULL to !symbol

Signed-off-by: Swee Hua Law <sweehua81@gmail.com>
---
 drivers/staging/lustre/lustre/llite/remote_perm.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
index a581826..39022ea 100644
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ b/drivers/staging/lustre/lustre/llite/remote_perm.c
@@ -54,8 +54,8 @@
 #include "../include/lustre_param.h"
 #include "llite_internal.h"
 
-struct kmem_cache *ll_remote_perm_cachep = NULL;
-struct kmem_cache *ll_rmtperm_hash_cachep = NULL;
+struct kmem_cache *ll_remote_perm_cachep;
+struct kmem_cache *ll_rmtperm_hash_cachep;
 
 static inline struct ll_remote_perm *alloc_ll_remote_perm(void)
 {
@@ -104,8 +104,7 @@ void free_rmtperm_hash(struct hlist_head *hash)
 		return;
 
 	for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
-		hlist_for_each_entry_safe(lrp, next, hash + i,
-					      lrp_list)
+		hlist_for_each_entry_safe(lrp, next, hash + i, lrp_list)
 			free_ll_remote_perm(lrp);
 	OBD_SLAB_FREE(hash, ll_rmtperm_hash_cachep,
 		      REMOTE_PERM_HASHSIZE * sizeof(*hash));
@@ -117,7 +116,8 @@ static inline int remote_perm_hashfunc(uid_t uid)
 }
 
 /* NB: setxid permission is not checked here, instead it's done on
- * MDT when client get remote permission. */
+ * MDT when client get remote permission.
+ */
 static int do_check_remote_perm(struct ll_inode_info *lli, int mask)
 {
 	struct hlist_head *head;
@@ -184,7 +184,7 @@ int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm)
 
 	if (!lli->lli_remote_perms) {
 		perm_hash = alloc_rmtperm_hash();
-		if (perm_hash == NULL) {
+		if (!perm_hash) {
 			CERROR("alloc lli_remote_perms failed!\n");
 			return -ENOMEM;
 		}
@@ -287,7 +287,7 @@ int lustre_check_remote_perm(struct inode *inode, int mask)
 
 		perm = req_capsule_server_swab_get(&req->rq_pill, &RMF_ACL,
 						   lustre_swab_mdt_remote_perm);
-		if (unlikely(perm == NULL)) {
+		if (unlikely(!perm)) {
 			mutex_unlock(&lli->lli_rmtperm_mutex);
 			rc = -EPROTO;
 			break;
@@ -321,8 +321,7 @@ void ll_free_remote_perms(struct inode *inode)
 	spin_lock(&lli->lli_lock);
 
 	for (i = 0; i < REMOTE_PERM_HASHSIZE; i++) {
-		hlist_for_each_entry_safe(lrp, node, next, hash + i,
-					      lrp_list)
+		hlist_for_each_entry_safe(lrp, node, next, hash + i, lrp_list)
 			free_ll_remote_perm(lrp);
 	}
 
-- 
2.1.4

Re: [PATCH] Fix various coding style problem

[Sudip Mukherjee]

On Sun, Aug 09, 2015 at 11:48:34PM +0800, Swee Hua Law wrote:
> 1) do not initialise globals to NULL
> 2) improve readability of hlist_for_each_entry_safe()
> 3) move */ to a separate line
> 4) change symbol == NULL to !symbol

These were many different changes in a single patch. Please break them
into separate patches and send it in a series.

regards
sudip

[PATCH V2 0/4] staging: lustre: split checkpatch fix for remote_perm.c into series

[Swee Hua Law]

Split patch into series. 
Fix various coding style issue in remote_perm.c:
[PATCH V2 1/4] staging: lustre: checkpatch: do not init global to NULL
[PATCH V2 2/4] staging: lustre: checkpatch: symbol == NULL should be !symbol
[PATCH V2 3/4] staging: lustre: checkpatch: move */ block comment to next line
[PATCH V2 4/4] staging: lustre: checkpatch: argument alignment for readability

[PATCH V2 1/4] staging: lustre: checkpatch: do not init global to NULL

[Swee Hua Law]

Fix checkpatch problem: remove NULL assignment fro global variable 

Signed-off-by: Swee Hua Law <sweehua81@gmail.com>
---
 drivers/staging/lustre/lustre/llite/remote_perm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
index a581826..c9a7816 100644
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ b/drivers/staging/lustre/lustre/llite/remote_perm.c
@@ -54,8 +54,8 @@
 #include "../include/lustre_param.h"
 #include "llite_internal.h"
 
-struct kmem_cache *ll_remote_perm_cachep = NULL;
-struct kmem_cache *ll_rmtperm_hash_cachep = NULL;
+struct kmem_cache *ll_remote_perm_cachep;
+struct kmem_cache *ll_rmtperm_hash_cachep;
 
 static inline struct ll_remote_perm *alloc_ll_remote_perm(void)
 {
-- 
2.1.4

[PATCH V2 2/4] staging: lustre: checkpatch: symbol == NULL should be !symbol

[Swee Hua Law]

Fix checkpatch problem: change == NULL comparison to !symbol

Signed-off-by: Swee Hua Law <sweehua81@gmail.com>
---
 drivers/staging/lustre/lustre/llite/remote_perm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
index c9a7816..aeda91a 100644
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ b/drivers/staging/lustre/lustre/llite/remote_perm.c
@@ -184,7 +184,7 @@ int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm)
 
 	if (!lli->lli_remote_perms) {
 		perm_hash = alloc_rmtperm_hash();
-		if (perm_hash == NULL) {
+		if (!perm_hash) {
 			CERROR("alloc lli_remote_perms failed!\n");
 			return -ENOMEM;
 		}
@@ -287,7 +287,7 @@ int lustre_check_remote_perm(struct inode *inode, int mask)
 
 		perm = req_capsule_server_swab_get(&req->rq_pill, &RMF_ACL,
 						   lustre_swab_mdt_remote_perm);
-		if (unlikely(perm == NULL)) {
+		if (unlikely(!perm)) {
 			mutex_unlock(&lli->lli_rmtperm_mutex);
 			rc = -EPROTO;
 			break;
-- 
2.1.4

[PATCH V2 3/4] staging: lustre: checkpatch: move */ block comment to next line

[Swee Hua Law]

Fix checkpatch problem: move */ from end of line to new line

Signed-off-by: Swee Hua Law <sweehua81@gmail.com>
---
 drivers/staging/lustre/lustre/llite/remote_perm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
index aeda91a..49d78a3 100644
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ b/drivers/staging/lustre/lustre/llite/remote_perm.c
@@ -117,7 +117,8 @@ static inline int remote_perm_hashfunc(uid_t uid)
 }
 
 /* NB: setxid permission is not checked here, instead it's done on
- * MDT when client get remote permission. */
+ * MDT when client get remote permission.
+ */
 static int do_check_remote_perm(struct ll_inode_info *lli, int mask)
 {
 	struct hlist_head *head;
-- 
2.1.4

[PATCH V2 4/4] staging: lustre: checkpatch: argument alignment for readability

[Swee Hua Law]

Fix checkpatch problem: move last argument of the hlist..() back to same line

Signed-off-by: Swee Hua Law <sweehua81@gmail.com>
---
 drivers/staging/lustre/lustre/llite/remote_perm.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
index 49d78a3..39022ea 100644
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ b/drivers/staging/lustre/lustre/llite/remote_perm.c
@@ -104,8 +104,7 @@ void free_rmtperm_hash(struct hlist_head *hash)
 		return;
 
 	for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
-		hlist_for_each_entry_safe(lrp, next, hash + i,
-					      lrp_list)
+		hlist_for_each_entry_safe(lrp, next, hash + i, lrp_list)
 			free_ll_remote_perm(lrp);
 	OBD_SLAB_FREE(hash, ll_rmtperm_hash_cachep,
 		      REMOTE_PERM_HASHSIZE * sizeof(*hash));
@@ -322,8 +321,7 @@ void ll_free_remote_perms(struct inode *inode)
 	spin_lock(&lli->lli_lock);
 
 	for (i = 0; i < REMOTE_PERM_HASHSIZE; i++) {
-		hlist_for_each_entry_safe(lrp, node, next, hash + i,
-					      lrp_list)
+		hlist_for_each_entry_safe(lrp, node, next, hash + i, lrp_list)
 			free_ll_remote_perm(lrp);
 	}
 
-- 
2.1.4