* [PATCH] fs: nfsd: fileache.c: Use built-in RCU list checking
@ 2020-02-13 15:03 madhuparnabhowmik10
2020-03-03 16:54 ` J. Bruce Fields
0 siblings, 1 reply; 2+ 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/filecache.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 32a9bf22ac08..547d2d8bde62 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -736,7 +736,7 @@ nfsd_file_find_locked(struct inode *inode, unsigned int may_flags,
unsigned char need = may_flags & NFSD_FILE_MAY_MASK;
hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head,
- nf_node) {
+ nf_node, lockdep_is_held(&nfsd_file_hashtbl[hashval].nfb_lock)) {
if ((need & nf->nf_may) != need)
continue;
if (nf->nf_inode != inode)
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] fs: nfsd: fileache.c: Use built-in RCU list checking
2020-02-13 15:03 [PATCH] fs: nfsd: fileache.c: Use built-in RCU list checking madhuparnabhowmik10
@ 2020-03-03 16:54 ` J. Bruce Fields
0 siblings, 0 replies; 2+ 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 08:33:59PM +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/filecache.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
> index 32a9bf22ac08..547d2d8bde62 100644
> --- a/fs/nfsd/filecache.c
> +++ b/fs/nfsd/filecache.c
> @@ -736,7 +736,7 @@ nfsd_file_find_locked(struct inode *inode, unsigned int may_flags,
> unsigned char need = may_flags & NFSD_FILE_MAY_MASK;
>
> hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head,
> - nf_node) {
> + nf_node, lockdep_is_held(&nfsd_file_hashtbl[hashval].nfb_lock)) {
> if ((need & nf->nf_may) != need)
> continue;
> if (nf->nf_inode != inode)
> --
> 2.17.1
^ permalink raw reply [flat|nested] 2+ messages in thread
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