Search notes:

include/generated/compile.h

include/generated/compile.h is generated by scripts/mkcompile_h and defines four macros:

#define UTS_MACHINE		"x86_64"
#define LINUX_COMPILE_BY	"rene"
#define LINUX_COMPILE_HOST	"appletree"
#define LINUX_COMPILER		"gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2"

The values of these macros are used for the string linux_banner (defined and/or declared in init/version-timestamp.c and init/version.c).

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