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locks: add a dedicated spinlock to protect i_flctx lists

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We can now add a dedicated spinlock without expanding struct inode.
Change to using that to protect the various i_flctx lists.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Jeff Layton
2015-01-16 15:05:57 -05:00
committed by Jeff Layton
parent a7231a9746
commit 6109c85037
9 changed files with 71 additions and 69 deletions
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4
fs/nfsd/nfs4state.c
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@@ -5572,14 +5572,14 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
flctx = inode->i_flctx;
if (flctx && !list_empty_careful(&flctx->flc_posix)) {
spin_lock(&inode->i_lock);
spin_lock(&flctx->flc_lock);
list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
if (fl->fl_owner == (fl_owner_t)lowner) {
status = true;
break;
}
}
spin_unlock(&inode->i_lock);
spin_unlock(&flctx->flc_lock);
}
fput(filp);
return status;