LU-4423 lustre: convert rsi_sem to a spinlock.

[fs/lustre-release.git] / lustre / obdclass / lprocfs_status.c

diff --git a/lustre/obdclass/lprocfs_status.c b/lustre/obdclass/lprocfs_status.c
index 63b28a8..2035fb7 100644 (file)
--- a/lustre/obdclass/lprocfs_status.c
+++ b/lustre/obdclass/lprocfs_status.c
@@ -2415,10 +2415,10 @@ int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
        if ((len == 4 && strncmp(kernbuf, "NONE", len) == 0) ||
            (len == 5 && strncmp(kernbuf, "clear", len) == 0)) {
                /* empty string is special case */
-               down_write(&squash->rsi_sem);
+               spin_lock(&squash->rsi_lock);
                if (!list_empty(&squash->rsi_nosquash_nids))
                        cfs_free_nidlist(&squash->rsi_nosquash_nids);
-               up_write(&squash->rsi_sem);
+               spin_unlock(&squash->rsi_lock);
                LCONSOLE_INFO("%s: nosquash_nids is cleared\n", name);
                OBD_FREE(kernbuf, count + 1);
                RETURN(count);
@@ -2434,11 +2434,11 @@ int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
        OBD_FREE(kernbuf, count + 1);
        kernbuf = NULL;
 
-       down_write(&squash->rsi_sem);
+       spin_lock(&squash->rsi_lock);
        if (!list_empty(&squash->rsi_nosquash_nids))
                cfs_free_nidlist(&squash->rsi_nosquash_nids);
        list_splice(&tmp, &squash->rsi_nosquash_nids);
-       up_write(&squash->rsi_sem);
+       spin_unlock(&squash->rsi_lock);
 
        RETURN(count);