Build with -O2 compiler options

Author: fatalcoder524

.github/actions/action.yml

@@ -461,10 +461,13 @@ runs:
         MAKE_ARGS="LLVM=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
           RUSTC=$KERNEL_PATH/prebuilts/rust/linux-x86/1.73.0b/bin/rustc \
           PAHOLE=$KERNEL_PATH/prebuilts/kernel-build-tools/linux-x86/bin/pahole \
-          LD=ld.lld HOSTLD=ld.lld KCFLAGS+=-Wno-error"
+          LD=ld.lld HOSTLD=ld.lld KCFLAGS+='-Wno-error -O2'"
         if [[ -v USE_LLVM_IAS ]]; then
           MAKE_ARGS="LLVM_IAS=1 $MAKE_ARGS"
         fi
+        
+        echo "CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y" >> ./arch/arm64/configs/gki_defconfig
+        
         make -j$(nproc --all) O=out $MAKE_ARGS gki_defconfig || exit 1
         make -j$(nproc --all) O=out $MAKE_ARGS || exit 1