diff --git a/components/fs/vfs/vfs_files.c b/components/fs/vfs/vfs_files.c
index f05bee1a..d62ed9df 100644
--- a/components/fs/vfs/vfs_files.c
+++ b/components/fs/vfs/vfs_files.c
@@ -39,7 +39,7 @@
 
 static struct File g_files[NR_OPEN_DEFAULT];
 
-int FileToFd(struct File *file)
+int FileToFd(const struct File *file)
 {
     if (file == NULL) {
         return (int)LOS_NOK;
diff --git a/components/fs/vfs/vfs_files.h b/components/fs/vfs/vfs_files.h
index ac7b7ff0..180aedbf 100644
--- a/components/fs/vfs/vfs_files.h
+++ b/components/fs/vfs/vfs_files.h
@@ -89,7 +89,7 @@ struct Dir {
     void              *dData;
 };
 
-int FileToFd(struct File *file);
+int FileToFd(const struct File *file);
 struct File *FdToFile(int fd);
 struct File *VfsFileGet(void);
 struct File *VfsFileGetSpec(int fd);
diff --git a/components/fs/vfs/vfs_mount.c b/components/fs/vfs/vfs_mount.c
index 3bb2a327..b92792ad 100644
--- a/components/fs/vfs/vfs_mount.c
+++ b/components/fs/vfs/vfs_mount.c
@@ -251,7 +251,7 @@ errout:
     return (int)LOS_NOK;
 }
 
-static void CloseFdsInMp(struct MountPoint *mp)
+static void CloseFdsInMp(const struct MountPoint *mp)
 {
     for (int fd = 0; fd < NR_OPEN_DEFAULT; fd++) {
         struct File *f = FdToFile(fd);
diff --git a/kal/posix/src/poll.c b/kal/posix/src/poll.c
index 2bf82e08..1a25e86c 100644
--- a/kal/posix/src/poll.c
+++ b/kal/posix/src/poll.c
@@ -175,7 +175,7 @@ STATIC INLINE INT32 PollTimedWait(struct pollfd *fds, nfds_t nfds, struct PollTa
             }
         } else if (left <= 0) {
             break;
-        } else if (left > 0) {
+        } else {
             clock_gettime(CLOCK_REALTIME, &curTime);
             last = (INT32)((curTime.tv_sec - startTime.tv_sec) * OS_SYS_MS_PER_SECOND +
                    (curTime.tv_nsec - startTime.tv_nsec) / (OS_SYS_NS_PER_SECOND / OS_SYS_MS_PER_SECOND));
diff --git a/kal/posix/src/pthread_cond.c b/kal/posix/src/pthread_cond.c
index b5a230b0..fde08678 100644
--- a/kal/posix/src/pthread_cond.c
+++ b/kal/posix/src/pthread_cond.c
@@ -42,12 +42,6 @@
 #include "los_event.h"
 #include "los_mux.h"
 
-typedef struct {
-    volatile INT32 *realValue;
-    INT32 value;
-    UINT32 clearEvent;
-} EventCond;
-
 #define INLINE inline
 
 #define BROADCAST_EVENT     1