LU-1729: lu_buf code cleaning

[fs/lustre-release.git] / lustre / mdd / mdd_object.c

diff --git a/lustre/mdd/mdd_object.c b/lustre/mdd/mdd_object.c
index 2851a70..e1b75af 100644 (file)
--- a/lustre/mdd/mdd_object.c
+++ b/lustre/mdd/mdd_object.c
@@ -119,11 +119,10 @@ struct lu_buf *mdd_buf_get(const struct lu_env *env, void *area, ssize_t len)
 
 void mdd_buf_put(struct lu_buf *buf)
 {
-        if (buf == NULL || buf->lb_buf == NULL)
-                return;
-        OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
-        buf->lb_buf = NULL;
-        buf->lb_len = 0;
+       if (buf == NULL || buf->lb_buf == NULL)
+               return;
+       OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
+       *buf = LU_BUF_NULL;
 }
 
 const struct lu_buf *mdd_buf_get_const(const struct lu_env *env,
@@ -139,19 +138,19 @@ const struct lu_buf *mdd_buf_get_const(const struct lu_env *env,
 
 struct lu_buf *mdd_buf_alloc(const struct lu_env *env, ssize_t len)
 {
-        struct lu_buf *buf = &mdd_env_info(env)->mti_big_buf;
+       struct lu_buf *buf = &mdd_env_info(env)->mti_big_buf;
 
-        if ((len > buf->lb_len) && (buf->lb_buf != NULL)) {
-                OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
-                buf->lb_buf = NULL;
-        }
-        if (buf->lb_buf == NULL) {
-                buf->lb_len = len;
-                OBD_ALLOC_LARGE(buf->lb_buf, buf->lb_len);
-                if (buf->lb_buf == NULL)
-                        buf->lb_len = 0;
-        }
-        return buf;
+       if ((len > buf->lb_len) && (buf->lb_buf != NULL)) {
+               OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
+               *buf = LU_BUF_NULL;
+       }
+       if (memcmp(buf, &LU_BUF_NULL, sizeof(*buf)) == 0) {
+               buf->lb_len = len;
+               OBD_ALLOC_LARGE(buf->lb_buf, buf->lb_len);
+               if (buf->lb_buf == NULL)
+                       *buf = LU_BUF_NULL;
+       }
+       return buf;
 }
 
 /** Increase the size of the \a mti_big_buf.