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* [PATCH] fs: nfsd: nfs4state.c: Use built-in RCU list checking
@ 2020-02-13 15:03 ` madhuparnabhowmik10
  0 siblings, 0 replies; 4+ messages in thread
From: madhuparnabhowmik10 @ 2020-02-13 15:03 UTC (permalink / raw)
  To: bfields, chuck.lever
  Cc: linux-nfs, linux-kernel, joel, frextrite, linux-kernel-mentees,
	paulmck, Madhuparna Bhowmik

From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>

list_for_each_entry_rcu() has built-in RCU and lock checking.

Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when  CONFIG_PROVE_RCU_LIST is enabled
by default.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
---
 fs/nfsd/nfs4state.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 369e574c5092..3a80721fe53d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4295,7 +4295,8 @@ find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
 {
 	struct nfs4_file *fp;
 
-	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
+	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
+				lockdep_is_held(&state_lock)) {
 		if (fh_match(&fp->fi_fhandle, fh)) {
 			if (refcount_inc_not_zero(&fp->fi_ref))
 				return fp;
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [Linux-kernel-mentees] [PATCH] fs: nfsd: nfs4state.c: Use built-in RCU list checking
@ 2020-02-13 15:03 ` madhuparnabhowmik10
  0 siblings, 0 replies; 4+ messages in thread
From: madhuparnabhowmik10 @ 2020-02-13 15:03 UTC (permalink / raw)
  To: bfields, chuck.lever
  Cc: linux-nfs, paulmck, linux-kernel, Madhuparna Bhowmik, joel,
	linux-kernel-mentees

From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>

list_for_each_entry_rcu() has built-in RCU and lock checking.

Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when  CONFIG_PROVE_RCU_LIST is enabled
by default.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
---
 fs/nfsd/nfs4state.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 369e574c5092..3a80721fe53d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4295,7 +4295,8 @@ find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
 {
 	struct nfs4_file *fp;
 
-	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
+	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
+				lockdep_is_held(&state_lock)) {
 		if (fh_match(&fp->fi_fhandle, fh)) {
 			if (refcount_inc_not_zero(&fp->fi_ref))
 				return fp;
-- 
2.17.1

_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

^ permalink raw reply related	[flat|nested] 4+ messages in thread
* Re: [PATCH] fs: nfsd: nfs4state.c: Use built-in RCU list checking
  2020-02-13 15:03 ` [Linux-kernel-mentees] " madhuparnabhowmik10
@ 2020-03-03 16:54   ` J. Bruce Fields
  -1 siblings, 0 replies; 4+ messages in thread
From: J. Bruce Fields @ 2020-03-03 16:54 UTC (permalink / raw)
  To: madhuparnabhowmik10
  Cc: chuck.lever, linux-nfs, linux-kernel, joel, frextrite,
	linux-kernel-mentees, paulmck

Applying for 5.7, thanks.--b.

On Thu, Feb 13, 2020 at 08:33:31PM +0530, madhuparnabhowmik10@gmail.com wrote:
> From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
> 
> list_for_each_entry_rcu() has built-in RCU and lock checking.
> 
> Pass cond argument to list_for_each_entry_rcu() to silence
> false lockdep warning when  CONFIG_PROVE_RCU_LIST is enabled
> by default.
> 
> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
> ---
>  fs/nfsd/nfs4state.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 369e574c5092..3a80721fe53d 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4295,7 +4295,8 @@ find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
>  {
>  	struct nfs4_file *fp;
>  
> -	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
> +	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
> +				lockdep_is_held(&state_lock)) {
>  		if (fh_match(&fp->fi_fhandle, fh)) {
>  			if (refcount_inc_not_zero(&fp->fi_ref))
>  				return fp;
> -- 
> 2.17.1

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH] fs: nfsd: nfs4state.c: Use built-in RCU list checking
@ 2020-03-03 16:54   ` J. Bruce Fields
  0 siblings, 0 replies; 4+ messages in thread
From: J. Bruce Fields @ 2020-03-03 16:54 UTC (permalink / raw)
  To: madhuparnabhowmik10
  Cc: linux-nfs, paulmck, linux-kernel, chuck.lever, joel,
	linux-kernel-mentees

Applying for 5.7, thanks.--b.

On Thu, Feb 13, 2020 at 08:33:31PM +0530, madhuparnabhowmik10@gmail.com wrote:
> From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
> 
> list_for_each_entry_rcu() has built-in RCU and lock checking.
> 
> Pass cond argument to list_for_each_entry_rcu() to silence
> false lockdep warning when  CONFIG_PROVE_RCU_LIST is enabled
> by default.
> 
> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
> ---
>  fs/nfsd/nfs4state.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 369e574c5092..3a80721fe53d 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4295,7 +4295,8 @@ find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
>  {
>  	struct nfs4_file *fp;
>  
> -	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
> +	hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
> +				lockdep_is_held(&state_lock)) {
>  		if (fh_match(&fp->fi_fhandle, fh)) {
>  			if (refcount_inc_not_zero(&fp->fi_ref))
>  				return fp;
> -- 
> 2.17.1
_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-03-03 16:54 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-13 15:03 [PATCH] fs: nfsd: nfs4state.c: Use built-in RCU list checking madhuparnabhowmik10
2020-02-13 15:03 ` [Linux-kernel-mentees] " madhuparnabhowmik10
2020-03-03 16:54 ` J. Bruce Fields
2020-03-03 16:54   ` [Linux-kernel-mentees] " J. Bruce Fields

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