sys_fsync 250 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_fsync, sys_fsync) sys_fsync 524 include/linux/syscalls.h asmlinkage long sys_fsync(unsigned int fd); sys_fsync 260 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_fsync, sys_fsync) sys_fsync 1894 tools/include/nolibc/nolibc.h int ret = sys_fsync(fd); sys_fsync 260 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_fsync, sys_fsync)