Search notes:

arch/x86/entry/syscall_64.c

System call table for x86-64
This file includes arch/x86/include/generated/asm/syscalls_64.h twice, with different definitions for __SYSCALL: 
#define __SYSCALL(nr, sym) extern long __x64_##sym(const struct pt_regs *);
#include <asm/syscalls_64.h>
#undef __SYSCALL

#define __SYSCALL(nr, sym) __x64_##sym,
asmlinkage const sys_call_ptr_t sys_call_table[] = {
#include <asm/syscalls_64.h>
}

x64_sys_call

x64_sys_call(struct pt_regs, int nr) is called from do_syscall_x64

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...', 1759398182, '216.73.216.42', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/kernel/source/arch/x86/entry/syscall_64_c(49): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78