Search notes:

include/generated/utsversion.h

The content of include/generated/utsversion.h looks like 
#define UTS_VERSION "#20 SMP PREEMPT_DYNAMIC Sat Sep 16 21:22:20 CEST 2023"
uts_version.h is for example included from arch/x86/boot/version.c.
A comment in kernel/gen_kheaders says that utsversion.h is generated after kernel/gen_kheaders.sh is executed.

Elements of UTS_VERSION

#20 The number after the # symbol (here 20) corresponds to the value found in .version. Can be overridden with KBUILD_BUILD_VERSION.
SMP $(smp-flag-y). (CONFIG_SMP)
PREEMPT_DYNAMIC $(prempt-flag-y). (Can alternatively be PREEMPT or PREEMPT_RT, depending on value of CONFIG_PREEMPT_BUILD, CONFIG_PREEMPT_DYNAMIC and CONFIG_PREEMPT_RT)
Sat Sep 16 21:22:20 CEST 2023 Timestamp of the build (LC_ALL=C date). Can be overridden with KBUILD_BUILD_TIMESTAMP.
These elements are determined in the section UTS_VERSION of init/Makefile.

See also

include/generated/

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/ke...', 1788510312, '216.73.217.21', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/kernel/source/include/generated/utsversion_h(57): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78