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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 <[email protected]>
Acked-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Jeff Layton 2015-01-16 15:05:57 -05:00 • committed by Jeff Layton
commit 6109c85037
9 changed files with 71 additions and 69 deletions
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12
fs/lockd/svcsubs.c
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@ -171,7 +171,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
return 0;
again:
file->f_locks = 0;
spin_lock(&inode->i_lock);
spin_lock(&flctx->flc_lock);
list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
if (fl->fl_lmops != &nlmsvc_lock_operations)
continue;
@ -183,7 +183,7 @@ again:
if (match(lockhost, host)) {
struct file_lock lock = *fl;
spin_unlock(&inode->i_lock);
spin_unlock(&flctx->flc_lock);
lock.fl_type = F_UNLCK;
lock.fl_start = 0;
lock.fl_end = OFFSET_MAX;
@ -195,7 +195,7 @@ again:
goto again;
}
}
spin_unlock(&inode->i_lock);
spin_unlock(&flctx->flc_lock);
return 0;
}
@ -232,14 +232,14 @@ nlm_file_inuse(struct nlm_file *file)
return 1;
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_lmops == &nlmsvc_lock_operations) {
spin_unlock(&inode->i_lock);
spin_unlock(&flctx->flc_lock);
return 1;
}
}
spin_unlock(&inode->i_lock);
spin_unlock(&flctx->flc_lock);
}
file->f_locks = 0;
return 0;