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Add more comment for yaffs_PruneWorker function.
author
charles
<charles>
Wed, 30 Dec 2009 22:30:12 +0000
(22:30 +0000)
committer
charles
<charles>
Wed, 30 Dec 2009 22:30:12 +0000
(22:30 +0000)
yaffs_guts.c
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diff --git
a/yaffs_guts.c
b/yaffs_guts.c
index d6e4b11a90acff73824a5a2c94c42707b2884b01..d3539a019d52a8cea9f2fc073665a55cb395f6c7 100644
(file)
--- a/
yaffs_guts.c
+++ b/
yaffs_guts.c
@@
-12,7
+12,7
@@
*/
const char *yaffs_guts_c_version =
*/
const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.10
1 2009-12-25 01:53:05
charles Exp $";
+ "$Id: yaffs_guts.c,v 1.10
2 2009-12-30 22:30:12
charles Exp $";
#include "yportenv.h"
#include "yportenv.h"
@@
-1807,6
+1807,10
@@
static void yaffs_SoftDeleteFile(yaffs_Object *obj)
* level 0 tnode entries must be zeroed out.
* Could also use this for file deletion, but that's probably better handled
* by a special case.
* level 0 tnode entries must be zeroed out.
* Could also use this for file deletion, but that's probably better handled
* by a special case.
+ *
+ * This function is recursive. For levels > 0 the function is called again on
+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
+ * If there is no data in a subtree then it is pruned.
*/
static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
*/
static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
@@
-1819,25
+1823,25
@@
static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
hasData = 0;
if(level > 0){
hasData = 0;
if(level > 0){
- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i]) {
- tn->internal[i] =
- yaffs_PruneWorker(dev, tn->internal[i],
- level - 1,
- (i == 0) ? del0 : 1);
- }
-
- if (tn->internal[i])
- hasData++;
-
}
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i]) {
+ tn->internal[i] =
+ yaffs_PruneWorker(dev, tn->internal[i],
+ level - 1,
+ (i == 0) ? del0 : 1);
+ }
+
+ if (tn->internal[i])
+ hasData++;
+ }
} else {
} else {
- int tnodeSize;
- __u32 *map = (__u32 *)tn;
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ int tnodeSize;
+ __u32 *map = (__u32 *)tn;
+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
tnodeSize /= sizeof(__u32);
+ if (tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
+ tnodeSize /= sizeof(__u32);
for(i = 0; !hasData && i < tnodeSize; i++){
if(map[i])
for(i = 0; !hasData && i < tnodeSize; i++){
if(map[i])