diff --git a/PKGBUILD b/PKGBUILD
index f24764c..56e5458 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -2,7 +2,7 @@
 # copied from Jan Alexander Steffens (heftig) <heftig@archlinux.org>
 
 pkgbase=linux-tom
-pkgver=6.15.3.arch1
+pkgver=6.15.4.arch1
 pkgrel=1
 pkgdesc='Linux'
 url='https://github.com/archlinux/linux'
diff --git a/config b/config
index 81b5e3f..4d5a3de 100644
--- a/config
+++ b/config
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 6.15.3-arch1 Kernel Configuration
+# Linux/x86 6.15.4-arch1 Kernel Configuration
 #
 CONFIG_CC_VERSION_TEXT="gcc (GCC) 15.1.1 20250425"
 CONFIG_CC_IS_GCC=y
@@ -11,7 +11,7 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=108700
+CONFIG_RUSTC_VERSION=108800
 CONFIG_RUST_IS_AVAILABLE=y
 CONFIG_RUSTC_LLVM_VERSION=200106
 CONFIG_CC_CAN_LINK=y
@@ -24,6 +24,7 @@ CONFIG_CC_HAS_COUNTED_BY=y
 CONFIG_CC_HAS_MULTIDIMENSIONAL_NONSTRING=y
 CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY=y
 CONFIG_RUSTC_HAS_COERCE_POINTEE=y
+CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES=y
 CONFIG_PAHOLE_VERSION=130
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
@@ -326,7 +327,7 @@ CONFIG_PERF_EVENTS=y
 CONFIG_SYSTEM_DATA_VERIFICATION=y
 CONFIG_PROFILING=y
 CONFIG_RUST=y
-CONFIG_RUSTC_VERSION_TEXT="rustc 1.87.0 (17067e9ac 2025-05-09) (Arch Linux rust 1:1.87.0-2)"
+CONFIG_RUSTC_VERSION_TEXT="rustc 1.88.0 (6b00bc388 2025-06-23) (Arch Linux rust 1:1.88.0-1)"
 CONFIG_BINDGEN_VERSION_TEXT="bindgen 0.72.0"
 CONFIG_TRACEPOINTS=y