Upgrade objtool warnings to errors

configname: CONFIG_OBJTOOL_WERROR

Linux Kernel Configuration
└─>Kernel hacking
└─>Compile-time checks and compiler options
└─>Upgrade objtool warnings to errors
In linux kernel since version 6.6.86 (release Date: 2025-04-07)
Fail the build on objtool warnings.

Objtool warnings can indicate kernel instability, including boot
failures. This option is highly recommended.

If unsure, say Y.
depends
CONFIG_OBJTOOL
NOT CONFIG_COMPILE_TEST