diff --git a/syscare-build/src/package/rpm/tags/attr.rs b/syscare-build/src/package/rpm/tags/attr.rs
index ef226d77b29cbde804a34b32ee6e7e9a24b5cb1d..b836e0275aa0f1b100e55d71dbf1b2dc4f164e46 100644
--- a/syscare-build/src/package/rpm/tags/attr.rs
+++ b/syscare-build/src/package/rpm/tags/attr.rs
@@ -29,32 +29,8 @@ impl std::fmt::Display for RpmDefAttr {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
-pub struct RpmAttr {
-    pub mode: u32,
-    pub user: String,
-    pub group: String,
-}
-
-impl std::fmt::Display for RpmAttr {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_fmt(format_args!(
-            "%attr({:o},{},{})",
-            self.mode, self.user, self.group
-        ))
-    }
-}
-
 #[test]
 fn test() {
-    let attr = RpmAttr {
-        mode: 0o755,
-        user: String::from("root"),
-        group: String::from("nobody"),
-    };
-    println!("RpmAttr::new()\n{}\n", attr);
-    assert_eq!(attr.to_string(), "%attr(755,root,nobody)");
-
     let def_attr = RpmDefAttr {
         file_mode: 0o755,
         user: String::from("root"),
diff --git a/syscare-common/src/ffi/os_str.rs b/syscare-common/src/ffi/os_str.rs
index 0c414e1875f079ba05a496a34e8c67996764db47..1e61fe931372b14fab3ff8922ffedc3bfa420839 100644
--- a/syscare-common/src/ffi/os_str.rs
+++ b/syscare-common/src/ffi/os_str.rs
@@ -141,7 +141,7 @@ pub trait OsStrExt: AsRef<OsStr> {
         })
     }
 
-    fn split_whitespace(&self) -> Filter<Split<SplitFn>, FilterFn> {
+    fn split_whitespace(&self) -> Filter<Split<'_, SplitFn>, FilterFn> {
         self.split(SplitFn::from(char::is_whitespace))
             .filter(|s| !s.is_empty())
     }
diff --git a/syscared/src/patch/driver/upatch/target.rs b/syscared/src/patch/driver/upatch/target.rs
index be5aabcd11d938fa68e16290c5d0e6f96dcceedb..ff35d2fb7456c2075c75256093fa2a20c3162425 100644
--- a/syscared/src/patch/driver/upatch/target.rs
+++ b/syscared/src/patch/driver/upatch/target.rs
@@ -24,8 +24,8 @@ use crate::patch::entity::UserPatch;
 
 #[derive(Debug, Default)]
 pub struct PatchTarget {
-    process_map: HashMap<i32, HashSet<Uuid>>,    // pid -> patch list
-    patch_map: IndexMap<Uuid, PathBuf>,          // uuid -> patch file
+    process_map: HashMap<i32, HashSet<Uuid>>, // pid -> patch list
+    patch_map: IndexMap<Uuid, PathBuf>,       // uuid -> patch file
     collision_map: HashMap<u64, IndexSet<Uuid>>, // function old addr -> patch collision list
 }
 
diff --git a/upatch-build/src/dwarf.rs b/upatch-build/src/dwarf.rs
index fe0821c6b38b0c40ccc14771563279ee35e84481..a643556db3043707023bbaf2fdcfc1a675c41a1a 100644
--- a/upatch-build/src/dwarf.rs
+++ b/upatch-build/src/dwarf.rs
@@ -304,7 +304,7 @@ pub struct ProducerIterator<R: Reader> {
 }
 
 impl<R: Reader<Offset = usize>> ProducerIterator<R> {
-    fn current(&self) -> Result<Option<(&Unit<R>, DebuggingInformationEntry<R>)>> {
+    fn current(&self) -> Result<Option<(&Unit<R>, DebuggingInformationEntry<'_, '_, R>)>> {
         if let Some((unit, offsets)) = &self.state {
             if let Some(offset) = offsets.last() {
                 return Ok(Some((unit, unit.entry(*offset)?)));
diff --git a/upatch-build/src/elf/read/elfs.rs b/upatch-build/src/elf/read/elfs.rs
index 52c5e6b6168c81b82c52141a89adc53043b5bb35..e6c65bbda29247925a64b4417fd218aeab9624a2 100644
--- a/upatch-build/src/elf/read/elfs.rs
+++ b/upatch-build/src/elf/read/elfs.rs
@@ -41,11 +41,11 @@ impl Elf {
         Ok(Self { mmap, endian })
     }
 
-    pub fn header(&self) -> Result<Header> {
+    pub fn header(&self) -> Result<Header<'_>> {
         Ok(Header::from(&self.mmap, self.endian))
     }
 
-    pub fn sections(&self) -> Result<SectionHeaderTable> {
+    pub fn sections(&self) -> Result<SectionHeaderTable<'_>> {
         let header = self.header()?;
         let offset = header.get_e_shoff() as usize;
         let num = header.get_e_shnum() as usize;
@@ -59,7 +59,7 @@ impl Elf {
         ))
     }
 
-    pub fn symbols(&self) -> Result<SymbolHeaderTable> {
+    pub fn symbols(&self) -> Result<SymbolHeaderTable<'_>> {
         let sections = self.sections()?;
         for section in sections.clone() {
             if section.get_sh_type().eq(&SHT_SYMTAB) {
diff --git a/upatch-build/src/elf/write/elfs.rs b/upatch-build/src/elf/write/elfs.rs
index 9ce2847898bf4a221632a441fb252b887723ba25..c2ea121bd13a06cef41249793b5f183c2f595694 100644
--- a/upatch-build/src/elf/write/elfs.rs
+++ b/upatch-build/src/elf/write/elfs.rs
@@ -70,7 +70,7 @@ impl Elf {
         Ok(res)
     }
 
-    pub fn symbols(&mut self) -> Result<SymbolHeaderTable> {
+    pub fn symbols(&mut self) -> Result<SymbolHeaderTable<'_>> {
         let sections = &self.sections()?;
         for section in sections {
             if section.get_sh_type().eq(&SHT_SYMTAB) {
diff --git a/upatch-build/src/file_relation.rs b/upatch-build/src/file_relation.rs
index 677cb8bce04616b76e6dd74f30d0eb745bd7a9e6..c7d941e4520cf6d71ed3497ca3aecbf2abb6216b 100644
--- a/upatch-build/src/file_relation.rs
+++ b/upatch-build/src/file_relation.rs
@@ -32,12 +32,6 @@ const UPATCH_ID_PREFIX: &str = ".upatch_";
 
 const NON_EXIST_PATH: &str = "/dev/null";
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct ObjectRelation {
-    pub original_object: PathBuf,
-    pub patched_object: PathBuf,
-}
-
 /*
  * The task of this class is to find out:
  * 1. relationship between binary and debuginfo