LU-4423 lustre: convert rsi_sem to a spinlock.

[fs/lustre-release.git] / lustre / mdt / mdt_lib.c

diff --git a/lustre/mdt/mdt_lib.c b/lustre/mdt/mdt_lib.c
index 020ff59..a970511 100644 (file)
--- a/lustre/mdt/mdt_lib.c
+++ b/lustre/mdt/mdt_lib.c
@@ -84,15 +84,15 @@ void mdt_exit_ucred(struct mdt_thread_info *info)
        }
 }
 
-static int match_nosquash_list(struct rw_semaphore *sem,
+static int match_nosquash_list(struct spinlock *rsi_lock,
                               struct list_head *nidlist,
                               lnet_nid_t peernid)
 {
        int rc;
        ENTRY;
-       down_read(sem);
+       spin_lock(rsi_lock);
        rc = cfs_match_nid(peernid, nidlist);
-       up_read(sem);
+       spin_unlock(rsi_lock);
        RETURN(rc);
 }
 
@@ -107,7 +107,7 @@ static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
        if (!squash->rsi_uid || ucred->uc_fsuid)
                RETURN(0);
 
-       if (match_nosquash_list(&squash->rsi_sem,
+       if (match_nosquash_list(&squash->rsi_lock,
                                &squash->rsi_nosquash_nids,
                                peernid)) {
                CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",