From ddb4e08c76afcae5e40e0bcb418683dfb2a22aa8 Mon Sep 17 00:00:00 2001
From: Minep <zelong56@gmail.com>
Date: Mon, 3 Oct 2022 22:11:00 +0100
Subject: [PATCH 1/1] fix: remove unnecessary backtracing in mnt_mkbusy/chillax
 fix: no need to do subtree reposition after symlink is resolved (for now).

---
 lunaix-os/kernel/fs/mount.c     | 20 ++++++--------------
 lunaix-os/kernel/fs/path_walk.c |  2 +-
 2 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/lunaix-os/kernel/fs/mount.c b/lunaix-os/kernel/fs/mount.c
index ff8d46b..c1e9784 100644
--- a/lunaix-os/kernel/fs/mount.c
+++ b/lunaix-os/kernel/fs/mount.c
@@ -68,25 +68,17 @@ __vfs_do_unmount(struct v_mount* mnt)
 void
 mnt_mkbusy(struct v_mount* mnt)
 {
-    while (mnt) {
-        mutex_lock(&mnt->lock);
-        mnt->busy_counter++;
-        mutex_unlock(&mnt->lock);
-
-        mnt = mnt->parent;
-    }
+    mutex_lock(&mnt->lock);
+    mnt->busy_counter++;
+    mutex_unlock(&mnt->lock);
 }
 
 void
 mnt_chillax(struct v_mount* mnt)
 {
-    while (mnt) {
-        mutex_lock(&mnt->lock);
-        mnt->busy_counter--;
-        mutex_unlock(&mnt->lock);
-
-        mnt = mnt->parent;
-    }
+    mutex_lock(&mnt->lock);
+    mnt->busy_counter--;
+    mutex_unlock(&mnt->lock);
 }
 
 int
diff --git a/lunaix-os/kernel/fs/path_walk.c b/lunaix-os/kernel/fs/path_walk.c
index c80d713..a0331e7 100644
--- a/lunaix-os/kernel/fs/path_walk.c
+++ b/lunaix-os/kernel/fs/path_walk.c
@@ -106,7 +106,7 @@ __vfs_walk(struct v_dnode* start,
             }
 
             // reposition the resolved subtree pointed by symlink
-            vfs_dcache_rehash(current_level->parent, dnode);
+            // vfs_dcache_rehash(current_level->parent, dnode);
             current_level = dnode;
             current_inode = dnode->inode;
         }
-- 
2.27.0