Fix unused variable warning

The variable cur_time in inode.c is now conditionally declared and
used only when the kernel version is 6.6.0. Therefore, another
condition needs to be added to check for its declaration, or it
should be only declared when used.

Author: HotMercury

inode.c

@@ -192,7 +192,9 @@ static struct inode *simplefs_new_inode(struct inode *dir, mode_t mode)
     int ret;
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(6, 7, 0)
     struct timespec64 cur_time;
+#endif
 #endif
 
     /* Check mode before doing anything to avoid undoing everything */
@@ -328,9 +330,10 @@ static int simplefs_create(struct inode *dir,
     struct buffer_head *bh, *bh2;
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(6, 7, 0)
     struct timespec64 cur_time;
 #endif
-
+#endif
     int ret = 0, alloc = false, bno = 0;
     int ei = 0, bi = 0, fi = 0;
 
@@ -538,7 +541,9 @@ static int simplefs_unlink(struct inode *dir, struct dentry *dentry)
     struct buffer_head *bh = NULL, *bh2 = NULL;
     struct simplefs_file_ei_block *file_block = NULL;
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(6, 7, 0)
     struct timespec64 cur_time;
+#endif
 #endif
     int ei = 0, bi = 0;
     int ret = 0;
@@ -677,7 +682,9 @@ static int simplefs_rename(struct inode *old_dir,
     struct simplefs_dir_block *dblock = NULL;
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(6, 7, 0)
     struct timespec64 cur_time;
+#endif
 #endif
 
     int new_pos = -1, ret = 0;