diff --git a/libfuse/lib/fuse.cpp b/libfuse/lib/fuse.cpp
index 1c5b15b8..f4b6c6e2 100644
--- a/libfuse/lib/fuse.cpp
+++ b/libfuse/lib/fuse.cpp
@@ -177,48 +177,6 @@ fuse_hdr_arg(const struct fuse_in_header *hdr_)
   return (void*)&hdr_[1];
 }
 
-static
-void
-list_add(struct list_head *new_,
-         struct list_head *prev_,
-         struct list_head *next_)
-{
-  next_->prev = new_;
-  new_->next  = next_;
-  new_->prev  = prev_;
-  prev_->next = new_;
-}
-
-static
-inline
-void
-list_add_head(struct list_head *new_,
-              struct list_head *head_)
-{
-  list_add(new_,head_,head_->next);
-}
-
-static
-inline
-void
-list_add_tail(struct list_head *new_,
-              struct list_head *head_)
-{
-  list_add(new_,head_->prev,head_);
-}
-
-static
-inline
-void
-list_del(struct list_head *entry)
-{
-  struct list_head *prev = entry->prev;
-  struct list_head *next = entry->next;
-
-  next->prev = prev;
-  prev->next = next;
-}
-
 static
 size_t
 id_hash(uint64_t ino)
diff --git a/libfuse/lib/helper.c b/libfuse/lib/helper.c
index 892e0650..6f19a48a 100644
--- a/libfuse/lib/helper.c
+++ b/libfuse/lib/helper.c
@@ -282,7 +282,7 @@ fuse_setup_common(int argc,
   if (res == -1)
     goto err_unmount;
 
-  res = fuse_set_signal_handlers(fuse_get_session(fuse));
+  res = fuse_set_signal_handlers(fuse_get_session());
   if (res == -1)
     goto err_unmount;
 
diff --git a/libfuse/lib/mount_bsd.c b/libfuse/lib/mount_bsd.c
index a9cdf576..d4c4111f 100644
--- a/libfuse/lib/mount_bsd.c
+++ b/libfuse/lib/mount_bsd.c
@@ -184,13 +184,16 @@ void fuse_kern_unmount(const char *mountpoint, int fd)
 }
 
 /* Check if kernel is doing init in background */
-static int init_backgrounded(void)
+static
+int
+init_backgrounded(void)
 {
-  unsigned ibg, len;
+  unsigned ibg;
+  size_t len;
 
   len = sizeof(ibg);
 
-  if (sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
+  if(sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
     return 0;
 
   return ibg;
@@ -298,10 +301,12 @@ static int fuse_mount_core(const char *mountpoint, const char *opts)
   return fd;
 }
 
-int fuse_kern_mount(const char *mountpoint, struct fuse_args *args)
+int
+fuse_kern_mount(const char       *mountpoint,
+                struct fuse_args *args)
 {
-  struct mount_opts mo;
   int res = -1;
+  struct mount_opts mo;
 
   memset(&mo, 0, sizeof(mo));
   /* mount util should not try to spawn the daemon */
@@ -317,7 +322,6 @@ int fuse_kern_mount(const char *mountpoint, struct fuse_args *args)
     return 0;
 
   res = fuse_mount_core(mountpoint, mo.kernel_opts);
- out:
   free(mo.kernel_opts);
   return res;
 }
diff --git a/libfuse/lib/mount_generic.c b/libfuse/lib/mount_generic.c
index 79459a77..ece542e2 100644
--- a/libfuse/lib/mount_generic.c
+++ b/libfuse/lib/mount_generic.c
@@ -17,7 +17,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <sys/poll.h>
+#include <poll.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/wait.h>
diff --git a/src/branch.hpp b/src/branch.hpp
index 4d314302..f0d07110 100644
--- a/src/branch.hpp
+++ b/src/branch.hpp
@@ -52,6 +52,9 @@ public:
   Branch(const Branch&);
   Branch(const u64 &default_minfreespace);
 
+public:
+  Branch& operator=(const Branch&) = default;
+
 public:
   bool ro(void) const;
   bool nc(void) const;
diff --git a/src/ioprio.cpp b/src/ioprio.cpp
index 80daf5a4..04106a25 100644
--- a/src/ioprio.cpp
+++ b/src/ioprio.cpp
@@ -6,7 +6,7 @@
 # include <sys/syscall.h>
 # include <unistd.h>
 #else
-#warning "ioprio not supported on this platform"
+#pragma message "ioprio not supported on this platform"
 #endif
 
 enum
diff --git a/src/procfs.cpp b/src/procfs.cpp
index 52a9a4c2..68d89dec 100644
--- a/src/procfs.cpp
+++ b/src/procfs.cpp
@@ -20,17 +20,6 @@
 static int g_PROCFS_DIR_FD = -1;
 namespace procfs { int PROC_SELF_FD_FD = -1; }
 static constexpr const char PROCFS_PATH[] = "/proc";
-static constexpr const char PROC_SELF_FD[] = "/proc/self/fd";
-
-// This is critical to the function of the app. abort if failed to
-// open.
-static
-void
-_open_proc_self_fd()
-{
-  procfs::PROC_SELF_FD_FD = fs::open(PROC_SELF_FD,O_PATH|O_DIRECTORY);
-  assert(procfs::PROC_SELF_FD_FD >= 0);
-}
 
 int
 procfs::init()
@@ -47,7 +36,12 @@ procfs::init()
   g_PROCFS_DIR_FD = rv;
 
 #if defined(__linux__)
-  ::_open_proc_self_fd();
+// This is critical to the function of the app. abort if failed to
+// open.
+  static constexpr const char PROC_SELF_FD[] = "/proc/self/fd";
+
+  procfs::PROC_SELF_FD_FD = fs::open(PROC_SELF_FD,O_PATH|O_DIRECTORY);
+  assert(procfs::PROC_SELF_FD_FD >= 0);
 #endif
 
   return 0;
diff --git a/src/ugid_rwlock.hpp b/src/ugid_rwlock.hpp
index a223614b..d0bf4fc5 100644
--- a/src/ugid_rwlock.hpp
+++ b/src/ugid_rwlock.hpp
@@ -16,6 +16,8 @@
 
 #pragma once
 
+#include "fuse_req_ctx.h"
+
 #include <pthread.h>
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/src/xattr.hpp b/src/xattr.hpp
index de760a0a..2d6b8212 100644
--- a/src/xattr.hpp
+++ b/src/xattr.hpp
@@ -30,7 +30,7 @@
 #  include <sys/xattr.h>
 # else
 #  undef USE_XATTR
-#  warning "USE_XATTR unset: xattrs disabled"
+#  pragma message "USE_XATTR unset: xattrs disabled"
 # endif
 #endif